WO2015135217A1

WO2015135217A1 - Pilot processing method and device for wireless local area network, and communication system

Info

Publication number: WO2015135217A1
Application number: PCT/CN2014/073476
Authority: WO
Inventors: 刘亚林; 朱俊; 张佳胤
Original assignee: 华为技术有限公司
Priority date: 2014-03-14
Filing date: 2014-03-14
Publication date: 2015-09-17
Also published as: CN106105375A; CN106105375B

Abstract

Provided are a pilot processing method and device for a wireless local area network, and a communication system. A sending end device of the present invention comprises: a pilot number determination module used for determining the total number of pilot subcarriers in a wireless local area network (WLAN) in a frequency domain; a frequency domain deployment module used for determining the serial number of subcarriers bearing pilot frequencies in the WLAN according to the total number of the pilot subcarriers in the frequency domain; a time domain deployment module used for uniformly bearing the pilot frequencies in a symbol of the WLAN in a time domain; and a signal sending module used for sending a signal to the receiving end device according to the serial number of the subcarriers bearing the pilot frequencies and the symbol, so that the receiving end device acquires phase tracking information according to the pilot frequencies in the signal, and thereby conducting phase compensation and demodulation on the data in the signal. The present invention eliminates the influence of residual frequency offset and phase noise generated by a system, thereby effectively reducing the packet error rate.

Description

Wireless local area network pilot processing method, device and communication system

The present invention relates to communication technologies, and in particular, to a pilot processing method, apparatus, and communication system for a wireless local area network. Background technique

In order to meet the increasing application needs of users, Wireless Local Area Networks (WLAN) standards have evolved rapidly over the past few years, from the Institute of Electrical and Electronics Engineers (IEEE) IEEE 802.11a/ g, developed to IEEE 802.11η, then to IEEE 802.11ac. In order to further improve the throughput, the IEEE 802.11 working group established the High Efficiency WLAN (HEW) learning group in 2013 to introduce Orthogonal Frequency Division Multiple Access (OFDM) in the WLAN. A), scheduling and other technologies. Existing WLAN systems include IEEE 802.1 la-based legacy systems, IEEE 802.11η-based High Throughput (HT) systems, and IEEE 802.1 lac-based Very High Throughput (VHT). The system has a subcarrier spacing of 312.5 kHz (kiloHertz, kHz for short). That is, when the legacy system, the HT system, and the VHT system use a 20 MHz (MHz) bandwidth, the number of subcarriers is 64. When using 40MHz bandwidth, the number of subcarriers is 128. When using 80MHz and 160MHz bandwidth, the number of subcarriers is 256 and 512 respectively.

The IEEE 802.il series of standards specifies the usage and distribution of the subcarriers of the above WLAN system. For example, in a WLAN system based on the IEEE 802.11a standard, the 20 MHz bandwidth has a total of 64 subcarriers, including 4 pilot subcarriers and 48 data sub-carriers. Carrier and 1 DC subcarrier, the remaining 11 subcarriers are used as protection bandwidth non-transmission information, and 4 pilot subcarriers are located at subcarriers-21, -7, 7 and 21, respectively. The pilot symbols are continuous in the time domain. Placed, each symbol on the immediate domain has a pilot subcarrier.

However, in order to improve throughput, the HEW learning group hopes to reduce the subcarrier spacing and increase the number of subcarriers based on the existing WLAN system, for example, the number of subcarriers in the 20 MHz bandwidth. The number is increased to 128, 256, 512, or even 1024. In this case, the number and distribution of pilots specified by the IEEE 802.11a or IEEE 802.11ac standard cannot be applied after the number of subcarriers is increased. The WLAN system cannot eliminate the effects of residual frequency offset and phase noise generated by the system, and the placement of pilots in the time domain specified in IEEE 802.11ac/lla/llg/lln can make the system overhead too large, which is not conducive to improving the system. Throughput. Summary of the invention

The invention provides a pilot processing method, device and communication system for a wireless local area network, which can eliminate the influence of residual frequency offset and phase noise generated by the system, and effectively reduce the error packet rate.

In a first aspect, the present invention provides a transmitting device, including:

a pilot number determining module, configured to determine, in a frequency domain, a total number of pilot subcarriers in a WLAN WLAN;

a frequency domain deployment module, configured to determine, according to the total number of the pilot subcarriers, a subcarrier number of the pilot that carries the pilot in the frequency domain;

a time domain deployment module, configured to uniformly carry the pilot in a symbol of the WLAN in a time domain;

a signal sending module, configured to send a signal to the receiving end device according to the subcarrier serial number carrying the pilot and the symbol, so that the receiving end device acquires phase tracking information according to the pilot in the signal, The data in the signal is then phase compensated and demodulated.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the frequency domain deployment module is specifically configured to: according to the total number of the pilot subcarriers, in the frequency domain, Frequency-symmetric and evenly distributed on both sides of the DC subcarrier of the WLAN to determine the subcarrier number of the bearer carrying pilot; or

And in the frequency domain, the pilot is uniformly deployed on the entire bandwidth of the WLAN according to the total number of the pilot subcarriers to determine the subcarrier number of the bearer.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the frequency domain deployment module is specifically configured to obtain the number of subcarriers of the WLAN compared to the Institute of Electrical and Electronics Engineers IEEE802.11ac/l a multiple of the number of subcarriers of the system having the same WLAN bandwidth as specified in la/llg/l ln; in the frequency domain, the IEEE 802.1 lac/ according to the total number of pilot subcarriers The system specified in 1 la/1 lg/1 In is the same as the WLAN bandwidth The subcarrier number of the pilot is increased by the multiple, and the subcarrier number carrying the pilot in the WLAN is obtained.

With reference to the first aspect, in a third possible implementation manner of the first aspect, if the bandwidth of the WLAN is 40 MHz, and the pilot number determining module is specifically configured to determine in the frequency domain, The total number of pilot subcarriers in the WLAN is eight, and the frequency domain deployment module is specifically configured to acquire, according to the total number of the pilot subcarriers, a 20 MHz bandwidth and the sub a system in which the number of carriers is half of the number of subcarriers of the WLAN, and the subcarrier number of the pilot is carried, and the subcarrier number of the pilot is expanded to obtain the half of the bandwidth of the WLAN. The subcarrier number of the pilot is determined according to the subcarrier number of the pilot carrying the pilot according to the half bandwidth of the WLAN, and the subcarrier number carrying the pilot on the symmetric half bandwidth of the WLAN is determined.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the frequency domain deployment module is specifically configured to use, in the frequency domain, the IEEE 802 according to the total number of the pilot subcarriers. The number of the subcarriers carrying the pilot in the WLAN, the number of the subcarrier numbers and the pilot in the number of 16 pilot subcarriers in the 160 MHz bandwidth system specified in .11ac The total number of subcarriers is equal, and the subcarrier numbers are evenly distributed over the entire bandwidth of the WLAN.

With reference to the first aspect, any one of the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the time domain deployment module is specifically configured to be used in In the time domain, the pilot is carried on every at least one of the symbols on the symbol of the WLAN.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the time domain deployment module is specifically configured to use, in a time domain, on a symbol of the WLAN The pilot is carried by one or three of the symbols.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilots determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -42, -14, 14, 42.

In combination with the first aspect, any one of the first to sixth possible implementations of the first aspect, In an eighth possible implementation manner of the first aspect, if the WLAN bandwidth is 20 MHz, and the number of subcarriers is 256, the pilot number determining module is specifically configured to be in the frequency domain. Determining that the total number of pilot subcarriers in the WLAN is four;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier numbers of the pilots carrying the pilots in the WLAN as -84, -28, 28, 84.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the ninth possible implementation manner of the first aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilots is 512, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier numbers of the pilots carrying the pilots in the WLAN as -168, -56, 56, 168.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the tenth possible implementation manner of the first aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilots is 1024, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, a subcarrier number of the pilot that carries the pilot in the WLAN as -336, -112, 112, 336.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the eleventh possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilots is 256, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN to be -106, -50, -22 , 22, 50, 106.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the twelfth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilots is 256, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to, according to the total frequency of the pilot subcarriers, in the frequency domain The number determines that the subcarrier numbers carrying the pilots in the WLAN are -106, -78, -50, -22, 22, 50, 78, 106.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the thirteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilots is 512, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN to be -212, -100, -44. , 44, 100, 212.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the fourteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilots is 512, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -212, -156, -100. , —44, 44, 100, 156, 212.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in the fifteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilots is 1024, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -424, -200, -88. , 88, 200, 424.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the sixteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilot sub-determination modules is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -424, -312, -200. , -88, 88, 200, 312, 424. With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the seventeenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilot sub-determination modules is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -848, -400, -176. , 176, 400, 848.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the eighteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 40 MHz, the subcarrier The number of pilot sub-determination modules is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -848, -624, -400. , -176, 176, 400, 624, 848.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the nineteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 80 MHz, the subcarrier The number of pilots is 512, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, a subcarrier number of the pilot that carries the pilot in the WLAN as -206, -150, -78. , -22, 22, 78, 150, 206.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the twentieth possible implementation manner of the first aspect, if the WLAN bandwidth is 80 MHz, the subcarrier The number of pilot sub-determination modules is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -412, -300, -156. , —44, 44, 156, 300, 412.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in the twenty-first possible implementation manner of the first aspect, if the WLAN bandwidth is 80MHz, the number of subcarriers is 2048, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier numbers of the pilots carrying the pilots in the WLAN as -824, -600, -312. , -88, 88, 312, 600, 824.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the twenty-second possible implementation manner of the first aspect, if the WLAN bandwidth is 80 MHz, The number of carriers is 4096, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN to be -1648, -1200, -624. , -176, 176, 624, 1200, 1648.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in the second thirteenth possible implementation manner of the first aspect, if the WLAN bandwidth is 160 MHz, The number of carriers is 1024, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is 16;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN to be -462, -406, -334. , -278, -234, -178, -106, -50, 50, 106, 178, 234, 278, 334, 406, 462.

With reference to the first aspect, any one of the first to sixth possible implementations of the first aspect, in the twenty-fourth possible implementation manner of the first aspect, if the WLAN bandwidth is 160 MHz, The number of carriers is 2048, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is 16;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -924, -812, -668. , -556, -468, -356, -212, -100, 100, 212, 356, 468, 556, 668, 812, 924.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in the twenty-fifth possible implementation manner of the first aspect, if the WLAN bandwidth is 160 MHz, The number of carriers is 4096, and the pilot number determining module is specifically used in Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is 16; the frequency domain deployment module is specifically configured to determine, according to the total number of pilot subcarriers, in the frequency domain. The subcarrier numbers carrying the pilots in the WLAN are -1848, -1624, -1336, -1112, -936, -712, -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848.

With reference to the first aspect, any one of the first to the sixth possible implementation manners of the first aspect, in the twenty-sixth possible implementation manner of the first aspect, if the WLAN bandwidth is 160 MHz, The number of carriers is 8192, and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is 16;

The frequency domain deployment module is specifically configured to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the WLAN as -3696, -3248, -2672 , -2224, -1872, -1424, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696.

In a second aspect, the present invention provides a receiving end device, including:

a signal receiving module, configured to receive a signal sent by the sending end device over the entire bandwidth of the WLAN of the wireless local area network;

a pilot processing module, configured to demodulate all the pilots from the received signal according to a subcarrier number carrying a pilot in the WLAN and a symbol of the WLAN, and acquire a phase according to the pilot tracking information;

And a data demodulation module, configured to perform phase compensation on the data in the signal according to the phase tracking information and demodulate the data.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the pilot processing module is specifically configured to: on a first symbol of the WLAN that carries the pilot, according to the bearer The pilot calculation carried on the resource element RE corresponding to the subcarrier number of the pilot acquires a first phase offset on the RE; and calculates, according to the first phase offset, a linear interpolation method a second phase offset phase offset on the frequency RE; determining a phase offset caused by residual frequency offset and phase noise based on the first phase offset and the second phase offset, and calculating the phase tracking information.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the pilot processing module is specifically configured to not carry the pilot Calculating, on the second symbol of the WLAN, a third phase offset on the RE in the same frequency band as the RE carrying the pilot by using a linear interpolation method according to the first phase offset; The phase offset uses a linear interpolation method to calculate a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot; determining the residual frequency offset according to the third phase offset and the fourth phase offset The phase deviation caused by the phase noise and the phase tracking information is calculated.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the pilot processing module is specifically configured to be used in the WLAN that does not carry the pilot Calculating, on the second symbol, the third phase offset on the second symbol by using a linear interpolation method according to the first phase offset on the first symbol before the second symbol; The third phase offset calculates a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot by using a linear interpolation method; determining according to the third phase offset and the fourth phase offset The phase deviation caused by the residual frequency offset and phase noise, and the phase tracking information is calculated.

With reference to the second possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the pilot processing module is specifically configured to be used in the WLAN that does not carry the pilot Calculating, on the second symbol, the third phase offset on the second symbol by linear interpolation according to the first phase offset on the first symbol before and after the second symbol Calculating a fourth phase offset on the RE of the different frequency band from the RE carrying the pilot according to the third phase offset by using a linear interpolation method; according to the third phase offset and the fourth phase offset The phase deviation determined by the residual frequency offset and the phase noise is determined, and the phase tracking information is calculated.

In a third aspect, the present invention provides a method for processing a pilot of a wireless local area network, including: determining, in a frequency domain, a total number of pilot subcarriers in a WLAN of a wireless local area network;

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of the pilot subcarriers;

In the time domain, the pilot is uniformly carried in the symbol of the WLAN;

And transmitting, by the receiving end device, a signal to the receiving end device according to the subcarrier serial number carrying the pilot and the symbol, so that the receiving end device acquires phase tracking information according to the pilot in the signal, and further, in the signal The data is phase compensated and demodulated.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the determining, in the frequency domain, determining, by using a total number of the pilot subcarriers, a subcarrier number of a pilot that carries a pilot in the WLAN. , including: Deploying, on the frequency domain, the pilots symmetrically and uniformly on both sides of the DC subcarriers of the WLAN according to the total number of the pilot subcarriers, to determine the subcarrier sequence number of the bearer pilot. Or,

With reference to the third aspect, in a second possible implementation manner of the third aspect, the determining, in the frequency domain, determining a subcarrier number of a pilot that carries a pilot in the WLAN according to the total number of the pilot subcarriers Previously, it also included:

Obtaining a multiple of the number of subcarriers of the WLAN compared to the number of subcarriers of the system having the same WLAN bandwidth as specified in the Institute of Electrical and Electronics Engineers IEEE 802.1 lac/1 la/1 lg/1 In;

Determining, in the frequency domain, the subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of the pilot subcarriers, including:

Carrying pilots in the same frequency system as the WLAN bandwidth specified in the IEEE 802.1 lac/1 la/1 lg/1 In according to the total number of pilot subcarriers in the frequency domain The subcarrier number is expanded by the multiple, and the subcarrier number carrying the pilot in the WLAN is obtained.

With reference to the third aspect, in a third possible implementation manner of the third aspect, if the bandwidth of the WLAN is 40 MHz MHz and the frequency domain is determined, the total number of pilot subcarriers in the WLAN is determined. The number of the subcarriers carrying the pilots in the WLAN is determined according to the total number of the pilot subcarriers in the frequency domain, including:

And in the frequency domain, a system that acquires a 20 MHz bandwidth according to the total number of the pilot subcarriers, and the number of the subcarriers is half of the number of subcarriers of the WLAN, and carries the pilot subcarrier sequence number. Encoding the subcarrier number of the pilot to obtain a subcarrier number carrying the pilot on a half of the bandwidth of the WLAN;

Determining a subcarrier number carrying the pilot on a symmetric half bandwidth of the WLAN according to a subcarrier number carrying the pilot on a bandwidth of one half of the WLAN.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the determining, in the frequency domain, determining a subcarrier number of a pilot that carries the pilot in the WLAN according to the total number of the pilot subcarriers , including: Selecting, in the frequency domain, a bearer in the WLAN from 16 pilot-bearing subcarrier numbers in a system of 160 MHz bandwidth specified in the IEEE802.11ac according to the total number of pilot subcarriers. The subcarrier number of the pilot, the number of the subcarrier numbers is equal to the total number of the pilot subcarriers, and the subcarrier numbers are evenly distributed over the entire bandwidth of the WLAN.

With reference to the third aspect, any one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, The frequency is uniformly carried in the symbols of the WLAN, including:

In the time domain, the pilot is carried every at least one of the symbols on the symbol of the WLAN.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the pilot is uniformly carried in a symbol of the WLAN in a time domain, Includes:

In the time domain, the pilot is carried every other or three of the symbols on the symbol of the WLAN.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a seventh possible implementation manner of the third aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilot subcarriers in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four; and determining, in the frequency domain, the bearer pilot in the WLAN according to the total number of the pilot subcarriers The subcarrier serial number, including:

And determining, in the frequency domain, that the subcarriers carrying the pilots in the WLAN are -42, -14, 14, 42 according to the total number of the pilot subcarriers.

With reference to the third aspect, the possible implementation manner of any one of the first to the sixth aspect, in the eighth possible implementation manner of the third aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilot subcarriers in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four; and determining, in the frequency domain, the bearer pilot in the WLAN according to the total number of the pilot subcarriers The subcarrier serial number, including: In the frequency domain, determining, according to the total number of the pilot subcarriers, the subcarrier numbers carrying the pilots in the WLAN are -84, -28, 28, 84.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a ninth possible implementation manner of the third aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilot subcarriers in the WLAN is determined in the frequency domain, including:

In the frequency domain, determining, according to the total number of the pilot subcarriers, that the subcarriers carrying the pilots in the WLAN are -168, -56, 56, 168.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a tenth possible implementation manner of the third aspect, if the WLAN bandwidth is 20 MHz, the subcarrier The number of pilot subcarriers in the WLAN is determined in the frequency domain, including:

In the frequency domain, determining, according to the total number of pilot subcarriers, that the subcarriers carrying the pilots in the WLAN are -336, -112, 112, 336.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the eleventh possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 256, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six; in the frequency domain, determining a bearer pilot in the WLAN according to a total number of the pilot subcarriers The subcarrier serial number, including:

In the frequency domain, determining, according to the total number of pilot subcarriers, the subcarrier numbers carrying the pilots in the WLAN are -106, -50, -22, 22, 50, 106.

Combining the third aspect, the first aspect to the sixth aspect, the possible implementation side In a twelfth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz and the number of subcarriers is 256, determining, in the frequency domain, a pilot in a wireless local area network WLAN The total number of carriers, including:

Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight; and determining, in the frequency domain, bearer pilots in the WLAN according to the total number of the pilot subcarriers. The subcarrier serial number, including:

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of pilot subcarriers is -106, -78, -50, -22, 22, 50, 78, 106.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the thirteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 512, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

In the frequency domain, determining, according to the total number of the pilot subcarriers, the subcarrier numbers carrying the pilots in the WLAN are -212, -100, -44, 44, 100, 212.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the fourteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 512, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of pilot subcarriers is -212, -156, -100, -44, 44, 100, 156, 212.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a fifteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 1024, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including: Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six; in the frequency domain, determining a bearer pilot in the WLAN according to a total number of the pilot subcarriers The subcarrier serial number, including:

In the frequency domain, determining, according to the total number of pilot subcarriers, that the subcarriers carrying the pilot in the WLAN are -424, -200, -88, 88, 200, 424.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a sixteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 1024, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of pilot subcarriers is -424, -312, -200, -88, 88, 200, 312, 424.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the seventeenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 2048, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

In the frequency domain, determining, according to the total number of the pilot subcarriers, that the subcarriers carrying the pilot in the WLAN are -848, -400, -176, 176, 400, 848.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the eighteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 40 MHz, The number of carriers is 2048, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight; and determining, in the frequency domain, bearer pilots in the WLAN according to the total number of the pilot subcarriers. The subcarrier serial number, including: Determining, in the frequency domain, that the subcarriers carrying the pilots in the WLAN are -848, -624, -400, -176, 176, 400, 624 according to the total number of pilot subcarriers. 848.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in a nineteenth possible implementation manner of the third aspect, if the WLAN bandwidth is 80 MHz, The number of carriers is 512, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of pilot subcarriers is -206, -150, -78, -22, 22, 78, 150, 206.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the twentieth possible implementation manner of the third aspect, if the WLAN bandwidth is 80 MHz, The number of carriers is 1024, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of pilot subcarriers is -412, -300, -156, -44, 44, 156, 300, 412.

With reference to the third aspect, the possible implementation of any one of the first to sixth aspects of the third aspect, in the twenty-first possible implementation manner of the third aspect, if the WLAN bandwidth is 80 MHz, The number of subcarriers is 2048, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the subcarriers carrying the pilots in the WLAN are -824, -600, -312, -88, 88, 312, 600 according to the total number of pilot subcarriers, 824.

Combining the third aspect, the first aspect to the sixth aspect, the possible implementation side In a twenty-second possible implementation manner of the third aspect, if the WLAN bandwidth is 80 MHz and the number of subcarriers is 4096, determining the pilot in the WLAN in the WLAN in the frequency domain The total number of subcarriers, including:

Determining, in the frequency domain, that the subcarrier numbers carrying the pilots in the WLAN are -1648, -1200, -624, -176, 176, 624, 1200 according to the total number of pilot subcarriers. 1648.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the twenty-third possible implementation manner of the third aspect, if the WLAN bandwidth is

160MHz, the number of subcarriers is 1024, then in the frequency domain, determine the wireless local area network

The total number of pilot subcarriers in the WLAN, including:

Determining, in the frequency domain, a total number of pilot subcarriers in the WLAN is 16; in the frequency domain, determining a bearer pilot in the WLAN according to a total number of the pilot subcarriers The subcarrier serial number, including:

Determining, in the frequency domain, that the subcarriers carrying the pilots in the WLAN are -462, -406, -334, -278, -234, -178 according to the total number of pilot subcarriers, -106, -50,

50, 106, 178, 234, 278, 334, 406, 462.

With reference to the third aspect, the possible implementation manner of any one of the first to sixth aspects of the third aspect, in the twenty-fourth possible implementation manner of the third aspect, if the WLAN bandwidth is

160MHz, the number of subcarriers is 2048, then in the frequency domain, determine the wireless local area network

The total number of pilot subcarriers in the WLAN, including:

Determining, in the frequency domain, that the subcarrier numbers carrying the pilots in the WLAN are -924, -812, -668, -556, -468, -356 according to the total number of pilot subcarriers, -212,

-100, 100, 212, 356, 468, 556, 668, 812, 924.

Combining the third aspect, the first aspect to the sixth aspect, the possible implementation side In a twenty-fifth possible implementation manner of the third aspect, if the WLAN bandwidth is 160 MHz and the number of subcarriers is 4096, determining the pilot in the WLAN in the WLAN in the frequency domain The total number of subcarriers, including:

Determining, in the frequency domain, that the subcarrier numbers carrying the pilots in the WLAN are -1848, -1624, -1336, -1112, -936, -712, according to the total number of pilot subcarriers. -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848.

With reference to the third aspect, the possible implementation of any one of the first to sixth aspects of the third aspect, in the twenty-sixth possible implementation manner of the third aspect, if the WLAN bandwidth is 160 MHz, The number of subcarriers is 8192, and the total number of pilot subcarriers in the WLAN in the WLAN is determined in the frequency domain, including:

Determining, in the frequency domain, that the subcarrier numbers carrying the pilots in the WLAN are -3696, -3248, -2672, -2224, -1872, -1424, according to the total number of the pilot subcarriers, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696.

A fourth aspect of the present invention provides a method for processing a pilot of a wireless local area network, including: receiving a signal sent by a transmitting end device over an entire bandwidth of a WLAN; and determining, according to the subcarrier number of the pilot in the WLAN, a symbol of the WLAN, demodulating all of the pilots from the received signal, and acquiring phase tracking information according to the pilot; phase compensating and demodulating data in the signal according to the phase tracking information The data.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the demodulating from the received signal according to a subcarrier number carrying a pilot in the WLAN and a symbol of the WLAN All the pilots, and acquiring phase tracking information according to the pilot, including:

Obtaining, on the first symbol of the WLAN that carries the pilot, the first on the RE according to the pilot calculation carried on the resource element RE corresponding to the subcarrier number carrying the pilot. Phase offset

Calculating, according to the first phase offset, a method of linear interpolation that does not carry the pilot

a second phase offset phase offset on the RE;

A phase deviation caused by residual frequency offset and phase noise is determined based on the first phase offset and the second phase offset, and the phase tracking information is calculated.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the subcarrier serial number carrying the pilot in the WLAN and the WLAN a symbol, demodulating all of the pilots from the received signal, and acquiring phase tracking information according to the pilot, including:

Calculating, on the second symbol of the WLAN that does not carry the pilot, a third phase offset on the RE in the same frequency band as the RE carrying the pilot by using a linear interpolation method according to the first phase offset ;

Calculating, according to the third phase offset, a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot by using a linear interpolation method;

A phase deviation caused by residual frequency offset and phase noise is determined based on the third phase offset and the fourth phase offset, and the phase tracking information is calculated.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the second symbol of the WLAN that does not carry the pilot, according to the foregoing A phase offset uses a linear interpolation method to calculate a third phase offset on the RE in the same frequency band as the RE carrying the pilot, including:

Calculating the first symbol by a linear interpolation method according to the first phase offset on the first symbol before the second symbol on the second symbol of the WLAN that does not carry the pilot The third phase offset on the two symbols.

With reference to the second or third possible implementation of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the second symbol of the WLAN that does not carry the pilot, Calculating, according to the first phase offset, a third phase offset on the RE in the same frequency band as the RE carrying the pilot by using a linear interpolation method, including:

Calculating the method by linear interpolation based on the first phase offset on the first symbol before and after the second symbol on the second symbol of the WLAN that does not carry the pilot Said third phase offset on the second symbol. According to a fifth aspect, the present invention provides a communication system, including: a transmitting end device and a receiving end device, wherein the transmitting end device adopts the first aspect, the first to the twenty-sixth of the first aspect The apparatus described in the possible implementation manners; the receiving end apparatus adopts the apparatus described in the second aspect, the possible implementation manner of any one of the first to fourth aspects of the second aspect.

The pilot processing method, device and communication system of the wireless local area network of the present invention, by redeploying pilot frequency distribution in the frequency domain and the time domain in a WLAN system with improved number of subcarriers, thereby improving system performance and throughput, and eliminating the system The effects of residual frequency offset and phase noise are generated, which effectively reduces the packet error rate. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic structural diagram of an embodiment of a transmitting end device according to the present invention;

2 is a schematic diagram of a subcarrier pattern;

3 is a schematic diagram of a subcarrier pattern of a WLAN with a number of subcarriers of 20 MHz bandwidth;

4A is a schematic diagram of a subcarrier pattern of a WLAN with a number of 256 20MHz bandwidth subcarriers;

4B is a schematic diagram of a subcarrier pattern of a WLAN with a number of 256 MIMO subcarriers;

5 is a schematic diagram of a subcarrier pattern of a WLAN with a number of sub-carriers of 20 MHz bandwidth;

6 is a schematic diagram of a subcarrier pattern of a WLAN with a number of 1024 20MHz bandwidth subcarriers;

FIG. 7 is a schematic diagram of a subcarrier pattern of a WLAN with a number of sub-carriers of 40 MHz bandwidth; FIG.

8 is a schematic diagram 2 of a subcarrier pattern of a WLAN with a number of 256 40MHz bandwidth subcarriers; 9 is a flowchart of an embodiment of a receiving end device according to the present invention;

FIG. 10 is a schematic diagram of a method for processing a pilot of a wireless local area network according to the present invention;

11 is a schematic diagram of a method for processing a pilot of a wireless local area network according to the present invention;

12 is a schematic structural diagram of an embodiment of a transmitting end device according to the present invention;

13 is a schematic structural diagram of an embodiment of a receiving end device according to the present invention;

14 is a schematic structural diagram of Embodiment 1 of a communication system according to the present invention;

FIG. 15 is a schematic structural diagram of Embodiment 2 of a communication system according to the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic structural diagram of an embodiment of a transmitting device according to the present invention. As shown in FIG. 1, the device in this embodiment may include: a pilot number determining module 11, a frequency domain deploying module 12, a time domain deploying module 13, and a signal sending module. The pilot number determining module 11 is configured to determine, in a frequency domain, a total number of pilot subcarriers in a WLAN, and a frequency domain deployment module 12, configured to: in the frequency domain, according to the guiding The total number of frequency subcarriers determines the subcarrier number of the pilot that carries the pilot in the WLAN; the time domain deployment module 13 is configured to uniformly carry the pilot in the symbol of the WLAN in the time domain; The module 14 is configured to send a signal to the receiving end device according to the subcarrier serial number carrying the pilot and the symbol, so that the receiving end device acquires phase tracking information according to the pilot in the signal, and further Phase compensation and demodulation of the data in the signal.

The transmitting device of this embodiment is suitable for comparison with the Institute of Electrical and Electronics Engineers (Institute of

Electrical and Electronics Engineers, IEEE 802.1 lac/1 la/llg/1 In specified standard, WLAN system with reduced subcarrier spacing and increased number of subcarriers. IEEE802.1 lac/1 la/l lg/1 In specifies that the subcarrier spacing of the WLAN system is 312.5 kHz, then the number of subcarriers in the 20 MHz bandwidth system is 64, and the number of subcarriers in the 40 MHz bandwidth system is 128, 80 MHz. Bandwidth system with 256 subcarriers, 160MHz bandwidth system The number of subcarriers is 512. IEEE802.11ac/lla/l lg/lln also specifies the usage and distribution of subcarriers of the WLAN system. For example, a system with 20 MHz bandwidth includes 4 pilot subcarriers and 48 data subcarriers. And one DC subcarrier, and the remaining 11 subcarriers are used as protection bandwidth non-transmission information, and the four pilot subcarriers are located at subcarrier numbers of -21, -7, 7, and 21, respectively, so the existing WLAN system The subcarrier spacing, the number of subcarriers, and the distribution and role of the subcarriers are all specified in the protocol. However, in order to improve throughput, we hope to reduce the subcarrier spacing and increase the number of subcarriers. For example, a 20MHz WLAN system can have 128, 256, 512, or even 1024 subcarriers. In this case, IEEE802 The four pilot subcarriers specified by .11ac/lla/llg/lln and their distribution are unable to meet the system's requirements for pilots. The device in this embodiment is applicable to the foregoing WLAN system with improved number of subcarriers. The WLAN system herein may be a 128 MHz WLAN system of 128, 256, 512, and 1024 subcarriers, or may be 256 or 512. A 1024, 2048 subcarrier 40 MHz WLAN system can also be an 80 MHz WLAN system of 512, 1024, 2048, 4096 subcarriers, or 160 MHz of 1024, 2048, 4096, 8192 subcarriers. WLAN system.

The transmitting end device of this embodiment considers two dimensions of a frequency division domain and a time domain when determining the deployment of the pilot. Firstly, the total number of pilot subcarriers in the WLAN system is determined in the frequency domain. This determination process can be determined by simulation results, which can not affect the performance of the system, and can effectively control the overhead of the system, so generally it can be Take the compromise between the two. For example, the WLAN with a bandwidth of 512 subcarriers of 20 MHz is simulated under the condition that the total number of pilot subcarriers is 4, 8, and 16. The simulation results show the pilot subcarriers. The higher the total number, the lower the packet error rate. In theory, the higher the total number of pilot subcarriers, the better the performance. Considering the overhead of the system on the pilot, the lower the overhead, the higher the throughput, 4 The error packet rate of the pilot subcarrier is very close to the packet error rate of the 16 pilot subcarriers, but the overhead of the pilot on the pilot is 1/4 of the 16 pilot subcarriers, which is the system performance and A good compromise of overhead, so the total number of pilot subcarriers is determined to be four in a WLAN system with a bandwidth of 512 subcarriers of 20 MHz. Secondly, in the frequency domain, the subcarrier number of the pilot bearer in the WLAN is determined according to the total number of pilot subcarriers, and the total number of pilot subcarriers has been determined, and these pilots need to be deployed in the subcarriers of the WLAN. In principle, it is desirable that the pilot subcarriers can be evenly distributed in the entire bandwidth of the WLAN, and the subcarrier numbers carrying the pilots are determined. The subcarriers in the middle of the WLAN subcarriers are DC subcarriers. Wave, the serial number of the DC subcarrier is 0, and the absolute value of the serial number on both sides gradually becomes symmetrically larger. The difference is that the serial number of one side is positive, and the serial number of one side is negative, so each subcarrier corresponds to a unique subcarrier serial number, and is determined. The subcarrier number carrying the pilot determines the position of the pilot in the frequency domain. Then, in the time domain, the pilot is uniformly carried in the symbol of the WLAN, and the WLAN can be divided into consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, which is in the prior art. On the subcarriers carrying the pilots, the pilot information is continuously carried on all the symbols, which also causes the system overhead to greatly affect the throughput. The present invention changes the deployment situation. In the time domain, the pilots are no longer continuous. Placement, only need to be evenly carried in the symbols of the WLAN, so-called uniform bearer can be placed on each of several symbols a pilot, in particular, several symbols must also consider system performance and system overhead, Take the compromise. Finally, according to the subcarrier number carrying the pilot and the symbol, sending a signal to the receiving device, so that the receiving device obtains phase tracking information according to the pilot in the signal, and then performs phase compensation on the data in the signal. And demodulation, through the deployment of the two dimensions of the frequency domain and the time domain, the transmitting device has uniformly mapped the pilot to the subcarriers and symbols of the system, and the WLAN system can use the frequency domain and the time domain to obtain the bandwidth resource. Divided into Resource Element (RE), Figure 2 is a schematic diagram of the subcarrier pattern. As shown in Figure 2, each small square represents an RE, which can be identified by the symbol and subcarrier number. The small square of black indicates the The RE carries the pilot, and the subcarrier number corresponding to the horizontal axis is obtained by the process of deploying the pilot in the frequency domain. How many black small squares in a column indicate the total number of pilot subcarriers, and The symbol corresponding to the axis is obtained by the foregoing process of deploying the pilot in the time domain, and the transmitting device sends a message to the receiving device according to the subcarrier pattern shown in FIG. The signal includes data carried on the pilot and other subcarriers, and the receiving device acquires phase tracking information according to the pilot in the signal, and then phase compensates the data according to the phase tracking information to accurately demodulate the data and reduce Packet error rate.

The apparatus of this embodiment improves system performance and throughput by redeploying pilot frequency distribution in the frequency domain and the time domain in a WLAN system with improved number of subcarriers, and eliminates residual frequency offset and phase noise generated by the system. Impact, effectively reducing the rate of packet errors.

Further, the frequency domain deployment module 12 is specifically configured to deploy the pilot symmetrically and uniformly on the DC subcarrier of the WLAN according to the total number of the pilot subcarriers in the frequency domain. Determining, by the side, the subcarrier number of the bearer; or, in the frequency domain, uniformly spreading the pilot to the entire bandwidth of the WLAN according to the total number of pilot subcarriers. The subcarrier number of the bearer pilot is determined.

Specifically, the apparatus of this embodiment has two methods for deploying pilots in the frequency domain, and one is

The WLAN DC subcarrier is an axis, and the pilot is symmetrically and uniformly deployed on the upper and lower sides, that is, the subcarrier carrying the pilot is on both sides of the subcarrier whose subcarrier number is 0, and the subcarrier numbers thereof are equal in absolute value, and one side is positive. The one side is negative, and the subcarrier number carrying the pilot can be obtained according to the result of the deployment; the other is to uniformly distribute the pilot in the entire bandwidth of the WLAN, that is, between the subcarriers adjacent to the pilot. If the intervals are equal or similar, the subcarrier number carrying the pilot can be obtained according to the result of the deployment.

Further, the frequency domain deployment module 12 is specifically configured to obtain the same number of subcarriers as the WLAN and the WLAN bandwidth specified in the IEEE 802.11ac/lla/llg/l ln of the WLAN. a multiple of the number of subcarriers to be expanded; in the frequency domain, the same as the WLAN bandwidth specified in the IEEE802.11ac/l la/llg/lln according to the total number of pilot subcarriers The subcarrier number carrying the pilot in the system is expanded by the multiple, and the subcarrier number carrying the pilot in the WLAN is obtained.

For example, IEEE802.11ac/lla/llg/l ln specifies a WLAN with a bandwidth of 20 MHz, with 64 subcarriers, and the subcarrier number carrying the pilot is -21, -7, 7, 21, and now the WLAN of 20 MHz bandwidth, The number of carriers is increased to 512. According to the simulation result, the total number of pilot subcarriers in the system is determined to be four, and the number of 512 subcarriers is eight times the number of 64 subcarriers. The subcarrier number of the pilot carrier defined by IEEE802.11ac is also Multiply by 8, ie (-21x8), (-7x8), (7x8), (21x8), get -84, -28, 28, 84, which is the WLAN system with 20MHz bandwidth 512 subcarriers determined in the frequency domain The subcarrier number of the bearer carrying the pilot.

For another example, the IEEE 802.1 lac specifies a WLAN with an 80 MHz bandwidth, and has 256 subcarriers. The subcarrier numbers carrying the pilots are -103, -75, -39, -11, 11, 39, 75, 103, and now 80 MHz bandwidth. WLAN, the number of subcarriers is increased to 1024. According to the simulation result, the total number of pilot subcarriers in the system is determined to be 8, and the number of 1024 subcarriers is 4 times the number of 256 subcarriers, and the bearer carrying the pilot defined by IEEE802.11ac is used. The carrier number is also multiplied by 4 to obtain -412, -300, - 156, -44, 44, 156, 300, 412. This is the bearer of the pilot that is determined in the frequency domain by the WLAN system with an bandwidth of 1024 subcarriers of 80 MHz bandwidth. Carrier number.

Further, if the bandwidth of the WLAN is 40 MHz and the pilot number determining module is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, the frequency domain is The deployment module 12 is specifically configured to, according to the total number of the pilot subcarriers, in the frequency domain Obtaining a sub-carrier number of the pilot that is obtained by acquiring a frequency of a sub-carrier number of the pilot by acquiring a sub-carrier number of the pilot, where the number of the sub-carriers is a half of the number of the sub-carriers of the WLAN. a subcarrier number carrying the pilot on a half of the bandwidth of the WLAN; determining, according to the subcarrier number carrying the pilot on the half of the bandwidth of the WLAN, the pilot carrying the pilot on the symmetric half of the bandwidth of the WLAN Carrier number.

Specifically, the WLAN system of 40 MHz bandwidth determines that the total number of pilot subcarriers of the system may be six or eight according to simulation results, and both cases are good discounts of packet error rate and throughput. Midpoint, if it is determined that the total number of pilot subcarriers is six, since the IEEE802.11ac/llg/lln specifies six subcarriers carrying pilots in a WLAN system with a bandwidth of 128 subcarriers of 40 MHz, the above expansion factor may be used. The method determines the subcarrier number of the bearer. If it is determined that the total number of pilot subcarriers is eight, the subcarrier number carrying the pilot may be determined in three steps, for example, a WLAN system with a bandwidth of 1024 subcarriers of 40 MHz, and a deployment of a WLAN system with a bandwidth of 512 subcarriers of 20 MHz bandwidth first. : IEEE802.11ac/lla/llg/l ln specifies that the subcarrier carrying the pilot in the WLAN system with a bandwidth of 64 subcarriers of 20 MHz bandwidth is A=[-21, -7, 7, 21], which is expanded by 8 times to obtain a bandwidth of 512 MHz. The subcarriers carrying the pilots in the WLAN system with subcarriers are B=Ax8=[-168, -56, 56, 168]; and the deployment of the WLAN system with a bandwidth of 1024 subcarriers of 40 MHz is obtained on half of the bandwidth: C=B +256=[88, 200, 312, 424]; Finally, the deployment of the other half of the WLAN system with a bandwidth of 1024 subcarriers of 40 MHz is obtained: D=-C=[-424, -312, -200, -88]. Therefore, it can be determined that the subcarrier numbers carrying the pilots in the WLAN system with a bandwidth of 1024 subcarriers of 40 MHz are -424, -312, -200, -88, 88, 200, 312, 424.

Further, the frequency domain deployment module 12 is specifically configured to: in the frequency domain, 16 bearer pilots in a system of 160 MHz bandwidth specified in the IEEE802.11ac according to the total number of the pilot subcarriers. The number of subcarriers carrying the pilot in the WLAN is selected from the subcarrier numbers, the number of the subcarrier numbers is equal to the total number of the pilot subcarriers, and the subcarrier number is in the The WLAN is evenly distributed over the entire bandwidth.

For example, IEEE 802.11ac specifies a 160 MHz bandwidth WLAN with 512 subcarriers, and 16 pilot-bearing subcarrier numbers are -231, -203, -167, -139, -117, -89, -53, - 25, 25, 53, 89, 117, 139, 167, 203, 231, four of the 16 subcarrier numbers can be uniformly extracted as the pilot subcarriers when the 512 subcarriers of the 20 MHz bandwidth are used. For example, it can be -231, -117, 25, 139, or -167, -53, 53, 167. There are many options, which are not listed here.

Further, the time domain deployment module 13 is specifically configured to carry the pilot every at least one of the symbols on the symbol of the WLAN in the time domain.

Preferably, the time domain deployment module 13 is specifically configured to carry the pilot every other one or three of the symbols on the symbol of the WLAN in the time domain.

Specifically, when the apparatus in this embodiment deploys the pilot in the time domain, the pilot is not deployed on each symbol, and may be deployed by one or more symbols. Preferably, the pilot may be carried by one symbol. The pilot can also be carried by three symbols, which can reduce the overhead of the system to carry the pilot and improve the system throughput.

The apparatus of the above embodiment can be separately deployed in the frequency domain and the time domain to determine the RE of the final bearer. The following describes several specific embodiments.

3 is a schematic diagram of a subcarrier pattern of a WLAN with a number of subcarriers of 20 MHz bandwidth. As shown in FIG. 3, the total number of pilot subcarriers determined in the WLAN is four, and the subcarrier number carrying the pilot is -42, -14, 14, 42, pilots are carried every other symbol. Optionally, the pilot is carried every three symbols in the time domain, and details are not described herein again.

4A is a schematic diagram of a subcarrier pattern of a 256 WLAN subcarrier with a number of 256 subcarriers. As shown in FIG. 4A, the total number of pilot subcarriers determined in the WLAN is four, and the pilot subcarrier number is carried. For -84, -28, 28, 84, pilots are carried every other symbol. 4B is a schematic diagram of a subcarrier pattern of a 256 WLAN subcarrier with a number of 256 subcarriers. As shown in FIG. 4B, the total number of pilot subcarriers determined in the WLAN is four, and the pilot subcarrier number is carried. For -84, -28, 28, 84, the pilot is carried every three symbols. Both of the above-mentioned two formats can realize the reasonable deployment of the entire bandwidth of the WLAN with the number of sub-carriers of 20 MHz bandwidth, which can not only reduce the packet error rate of the system, but also can not affect the throughput of the system. The deployment obtains accurate phase tracking information to demodulate the data.

5 is a schematic diagram of a subcarrier pattern of a 512 WLAN subcarrier with a number of 512 subcarriers. As shown in FIG. 5, the total number of pilot subcarriers determined in the WLAN is four, and the subcarrier number carrying the pilot is -168, -56, 56, 168, Pilots are carried every three symbols. Optionally, as shown in FIG. 4A, pilots are carried every other symbol in the time domain, and details are not described herein again.

FIG. 6 is a schematic diagram of a subcarrier pattern of a WLAN with a number of 1024 subcarriers of 20 MHz bandwidth. As shown in FIG. 6, the total number of pilot subcarriers determined in the WLAN is four, and the subcarriers carrying pilots are numbered -336, -112, 112, 336, and pilots are carried every three symbols. Optionally, as shown in FIG. 4A, the pilot is carried every other symbol in the time domain, and details are not described herein again.

FIG. 7 is a schematic diagram of a subcarrier pattern of a WLAN with a number of 256 subcarriers of 40 MHz bandwidth. As shown in FIG. 7, the total number of pilot subcarriers determined in the WLAN is six, and the subcarrier number carrying the pilot is used. For -106, -50, -22, 22, 50, 106, pilots are carried every other symbol. Alternatively, as shown in FIG. 4B, the pilot is carried every three symbols in the time domain, and details are not described herein again.

8 is a schematic diagram of a subcarrier pattern of a WLAN with a number of 256 subcarriers of 40 MHz bandwidth. As shown in FIG. 8, the total number of pilot subcarriers determined in the WLAN is eight, and the subcarrier number of the pilot is carried. The pilot is carried every three symbols for -106, -78, -50, -22, 22, 50, 78, 106. Optionally, as shown in FIG. 4A, the pilot is carried every other symbol in the time domain, and details are not described herein again.

Similarly, the total number of WLAN determined pilot subcarriers with a number of 512 40MHz bandwidth subcarriers is six, and the subcarrier numbers carrying the pilots are -212, -100, -44, 44, 100, 212, The pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of WLAN determined pilot subcarriers is 512, and the number of subcarriers carrying pilots is -212, -156, -100, -44, 44, 100, 156. 212, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of pilot subcarriers of the WLAN with a number of 1024 40MHz bandwidth subcarriers is six, and the subcarrier numbers carrying the pilots are -424, -200, -88, 88, 200, 424, as shown in the figure. Each of the symbols shown in FIG. 4A carries a pilot, and as shown in FIG. 4B, the pilot is carried every three symbols in the time domain, and details are not described herein again.

The total number of WLAN determined pilot subcarriers with 1024 OFDM subcarriers is 8 and the subcarriers carrying pilots are -424, -312, -200, -88, 88, 200, 312. 424, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of pilot subcarriers determined by the WLAN of 4048 bandwidth subcarriers is 2048. For six, the subcarriers carrying the pilots are numbered -848, -400, -176, 176, 400, 848. The pilots may be carried every other symbol as shown in FIG. 4A, or as shown in FIG. 4B. The pilot is carried every three symbols in the time domain, and will not be described in detail here.

The total number of WLAN determined pilot subcarriers with 2040 bandwidth subcarriers is 2048, and the subcarriers carrying pilots are -848, -624, -400, -176, 176, 400, 624. 848, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of WLAN determining pilot subcarriers with 512 802 WLAN subcarriers is 8 and the subcarriers carrying pilots are -206, -150, -78, -22, 22, 78, 150. 206, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of WLAN determined pilot subcarriers with 1024 802 WLAN subcarriers is 8, and the subcarriers carrying pilots are -412, -300, -156, -44, 44, 156, 300. 412, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of WLAN determined pilot subcarriers with 2048 bandwidth subcarriers is 2048, and the subcarriers carrying pilots are -824, -600, -312, -88, 88, 312, 600, 824, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of WLAN determined pilot subcarriers with 4096 802 WLAN subcarriers is 8 and the subcarriers carrying pilots are -1648, -1200, -624, -176, 176, 624, 1200. 1648, the pilot may be carried every other symbol as shown in FIG. 4A, or may be carried every three symbols in the time domain as shown in FIG. 4B, and details are not described herein again.

The total number of pilot subcarriers of the WLAN with 160 Mbps bandwidth subcarriers is 164, and the subcarriers carrying the pilots are -462, -406, -334, -278, -234, -178, -106, -50, 50, 106, 178, 234, 278, 334, 406, 462, the pilot may be carried every other symbol as shown in FIG. 4A, or as shown in FIG. 4B, every time in the time domain. The three symbols carry pilots, which are not described in detail here.

The total number of WLAN determined pilot subcarriers with a number of 16048 bandwidth subcarriers is 1648, and the subcarrier numbers carrying the pilots are -924, -812, -668, -556, -468, -356, -212, -100, 100, 212, 356, 468, 556, 668, 812, 924, can be as shown

Each of the symbols shown in FIG. 4A carries a pilot, and as shown in FIG. 4B, the pilot is carried every three symbols in the time domain, and details are not described herein again.

The total number of pilot subcarriers for WLANs with 4096 CDMA subcarriers is 16, and the subcarriers carrying pilots are -1848, -1624, -1336, -1112, -936, -712, -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848, the pilot may be carried every other symbol as shown in FIG. 4A, or as shown in FIG. 4B, every time in the time domain. The three symbols carry pilots, which are not described in detail here.

The total number of WLAN determining pilot subcarriers with the number of 160MHz bandwidth subcarriers is 8192, and the subcarrier numbers carrying pilots are -3696, -3248, -2672, -2224, -1872, -1424, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696, the pilot may be carried every other symbol as shown in FIG. 4A, or as shown in FIG. 4B, every time in the time domain. The three symbols carry pilots, which are not described in detail here.

FIG. 9 is a flowchart of an embodiment of a receiving device according to the present invention. As shown in FIG. 9, the device in this embodiment may include: a signal receiving module 11, a pilot processing module 12, and a data demodulating module 13, wherein the signal receiving module 11. The signal is sent by the sending end device on the entire bandwidth of the WLAN WLAN. The pilot processing module 12 is configured to receive, according to the subcarrier serial number carrying the pilot in the WLAN and the WLAN symbol. Demodulating all the pilots in the signal, and acquiring phase tracking information according to the pilot; the data demodulating module 13 is configured to perform phase compensation and solution on the data in the signal according to the phase tracking information. Tune the data.

The apparatus of the present embodiment is suitable for a wireless local area network (WLAN) WLAN system in which the subcarrier spacing is reduced and the number of subcarriers is increased as compared with the standard specified by IEEE 802.11ac/lla/l lg/lln of the Institute of Electrical and Electronics Engineers. Corresponding to the illustrated device embodiment, the device in this embodiment receives the signal sent by the transmitting device, and according to the deployment of the pilot in the frequency domain and the time domain, that is, according to the subcarrier pattern diagrams described in the foregoing embodiments, which REs are learned. The pilot is carried, the pilots are demodulated, and the phase tracking information of the received signal is obtained according to the pilot. The phase tracking information includes information such as the phase offset of the signal, and the receiving device compares the data in the signal according to the phase tracking information. This phase can be accurately demodulated after phase compensation.

The device in this embodiment obtains signal phase tracking information according to the deployment situation of the pilot in the frequency domain and the time domain, and accurately demodulates the data in the signal, thereby realizing system performance and throughput. High, eliminating the effects of residual frequency offset and phase noise generated by the system, effectively reducing the packet error rate. Further, the pilot processing module 12 is specifically configured to: according to the first symbol of the WLAN that carries the pilot, according to the resource element RE corresponding to the subcarrier number of the bearer carrying pilot Calculating a first phase offset on the RE according to a frequency calculation; calculating, by using a linear interpolation method, a second phase offset phase offset on an RE that does not carry the pilot according to the first phase offset; The first phase offset and the second phase offset determine a phase deviation caused by residual frequency offset and phase noise, and calculate the phase tracking information.

Specifically, since the pilot is not deployed on consecutive symbols, the symbol of the signal received by the receiving device may be a symbol carrying a pilot, or may be a symbol without a pilot, if the pilot is carried. The first symbol, the device first calculates a first phase offset of the RE carrying the pilot according to the pilot, and then calculates the first symbol by using a linear interpolation method according to the calculated first phase offset. There is no second phase offset on the RE carrying the pilot. For example, as shown in the subcarrier pattern shown in FIG. 4A, the receiving device first carries the guidance carried on RE ( 1, -84), RE ( 1, -28 ), RE ( 1, 28) , RE ( 1, 84). Calculating a first phase offset on the REs, and calculating a second phase offset of the other REs on the symbol 1 that do not carry the pilot according to the first phase offset by linear interpolation, according to the first phase offset and The second phase offset determines the phase deviation caused by the residual frequency offset and phase noise on symbol 1, and calculates the phase tracking information of all REs on symbol 1.

Further, the pilot processing module 12 is specifically configured to calculate, according to the first phase offset, a linear interpolation method according to the first phase offset on the second symbol of the WLAN that does not carry the pilot. a third phase offset on the RE of the frequency RE of the same frequency band; calculating, according to the third phase offset, a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot by linear interpolation And determining a phase deviation caused by residual frequency offset and phase noise according to the third phase offset and the fourth phase offset, and calculating the phase tracking information.

Specifically, if the second symbol is not carrying the pilot, the apparatus first calculates a third phase offset on the RE in the same frequency band as the RE carrying the pilot by linear interpolation according to the first phase offset. And calculating a fourth phase offset on the other REs on the second symbol by linear interpolation according to the third phase offset. For example, as shown in the subcarrier pattern shown in FIG. 4A, RE (1, -84), RE (1, -28), RE (1, 28), RE (1, 84), RE (3, - 84), RE (3, -28), RE (3, 28), RE (3, 84) after the first phase offset, can be based on The first phase offset of RE ( 1, -84) and RE (3, -84) is calculated by linear interpolation

The third phase offset of (4, -84), and so on, can calculate the third phase offset on RE (4, -28), RE (4, 28), RE (4, 84), and then Calculating a fourth phase offset on the other REs on the symbol 4 by linear interpolation according to the third phase offsets, and determining the residual frequency offset on the symbol 4 according to the third phase offset and the fourth phase offset. Phase deviation caused by phase noise, and phase tracking information of all REs on symbol 4 is calculated.

Further, the pilot processing module 12 may calculate the third phase offset by using a method of linear interpolation according to the first phase offset on the first symbol before the second symbol. The third phase offset on the symbol may further be that the second symbol is calculated by linear interpolation according to the first phase offset on the first symbol before and after the second symbol The third phase offset.

Specifically, if it is on the second symbol that does not carry the pilot, the receiving end device may calculate the pilot on the symbol 4 by using the pilots on the symbols 1 and 3 as in the above embodiment, or may adopt The pilot on symbol 3 and symbol 5 calculates the pilot on symbol 4, which is not specifically limited herein. It should be noted that the first method is slightly better than the second method, because according to the actual situation of the next generation WLAN, each frame has a long training sequence in front, and the first symbol of each resource block is set to be carried. Pilot information, so any one of the symbols without pilot information can find the two pilot information in front of it, and not every symbol without pilot information, after which the pilot information can be found.

FIG. 10 is a flowchart of Embodiment 1 of a method for processing a pilot of a wireless local area network according to the present invention. As shown in FIG. 10, the method in this embodiment may include:

Step 101: Determine a total number of pilot subcarriers in the WLAN in the frequency domain. The executor of this embodiment may be a transmitting device. The method in this embodiment is applicable to the IEEE 802. 1 lac/1 la/1 lg/1 In The standard specified, the WLAN system with reduced subcarrier spacing and increased number of subcarriers.

Step 102: Determine, in the frequency domain, a sequence number of a subcarrier carrying a pilot in the WLAN according to a total number of the pilot subcarriers;

In this embodiment, the source device has determined the total number of pilot subcarriers, and the pilots need to be deployed in the subcarriers of the WLAN. In principle, it is desirable that the pilot subcarriers can be uniformly distributed throughout the WLAN. In the bandwidth, that is, the interval between adjacent subcarriers carrying pilots is equal Or, the subcarrier numbers carrying the pilots are determined. The subcarriers in the middle of the subcarriers of the WLAN are DC subcarriers, and the sequence number of the DC subcarriers is 0, and the absolute values of the two sides are gradually symmetrically increased. The difference is that the sequence number of one side is positive, and the sequence number of one side is negative. Therefore, each subcarrier corresponds to a unique subcarrier sequence number, and the subcarrier number carrying the pilot is determined, that is, the position of the pilot in the frequency domain is determined.

Step 103: In the time domain, the pilot is uniformly carried in the symbol of the WLAN. In this embodiment, the transmitting device uniformly carries the pilot in the symbol of the WLAN, and the WLAN is in the time domain. The OFDM symbol is divided into consecutive OFDM symbols. In the prior art, the pilots are continuously carried on all the symbols, which also causes the system overhead to greatly affect the throughput. The present invention changes the deployment situation. In the time domain, the pilots are no longer used. It is a continuous placement, and it only needs to be uniformly carried in the symbols of the WLAN. The so-called uniform bearer can place one pilot for each several symbols, and the system performance and system overhead should also be considered in several symbols. In terms of aspect, take the compromise.

Step 104: Send a signal to the receiving end device according to the subcarrier serial number carrying the pilot and the symbol, so that the receiving end device acquires phase tracking information according to the pilot in the signal, and further The data in the signal is phase compensated and demodulated.

In this embodiment, the transmitting device has uniformly mapped the pilot to the subcarriers and symbols of the system by using the two dimensions of the frequency domain and the time domain, for example, according to the subcarrier pattern shown in FIG. 2 to the receiving device. Transmitting a signal, the signal includes data carried on the pilot and other subcarriers, and the receiving device acquires phase tracking information according to the pilot in the signal, and then phase compensates the data according to the phase tracking information to accurately demodulate the data. , reduce the packet error rate.

In this embodiment, by re-deploying the pilot distribution in the frequency domain and the time domain in the WLAN system with the increased number of subcarriers, system performance and throughput are improved, and the residual frequency offset and phase noise generated by the system are eliminated. Effectively reduce the packet error rate.

Further, the step 102 of the foregoing method embodiment is to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the frequency domain, and the specific implementation method may be: Configuring, in the frequency domain, the pilots are symmetrically and uniformly distributed on both sides of the DC subcarriers of the WLAN according to the total number of the pilot subcarriers, to determine the subcarrier sequence number of the pilot bearer; or And in the frequency domain, the pilot is uniformly deployed on the entire bandwidth of the WLAN according to the total number of the pilot subcarriers to determine the subcarrier number of the bearer. Specifically, in this embodiment, there are two methods for deploying pilots in the frequency domain, one is that the WLAN DC subcarriers are used as the axis, and the pilots are symmetrically and uniformly deployed on the upper and lower sides, that is, the subcarriers carrying the pilots are in the sub-carriers. On both sides of the subcarrier with the carrier number 0, the subcarrier numbers have the same absolute value, one side is positive and one side is negative. The other is to uniformly distribute the pilots in the entire bandwidth of the WLAN, that is, adjacent bearers. The spacing between the subcarriers of the pilot is equal or close.

Further, before step 102 of the foregoing method embodiment, the method further includes: acquiring the number of subcarriers of the WLAN is the same as the WLAN bandwidth specified in the Institute of Electrical and Electronics Engineers IEEE802.11ac/lla/l lg/lln a multiple of the number of subcarriers of the system is expanded; Step 102: In the frequency domain, determining a subcarrier number of the pilot that carries the pilot in the WLAN according to the total number of the pilot subcarriers, and the specific implementation method may be: And in the frequency domain, the subcarrier number carrying the pilot in the system with the same bandwidth as the WLAN specified in the IEEE802.11ac/lla/l lg/lln according to the total number of the pilot subcarriers The multiple is expanded to obtain a subcarrier number carrying the pilot in the WLAN.

Further, if the bandwidth of the WLAN is 40 MHz and in the frequency domain, determining that the total number of pilot subcarriers in the WLAN is eight, step 102 of the foregoing method embodiment is at the frequency. Determining, according to the total number of the pilot subcarriers, the subcarrier number of the pilot in the WLAN, the specific implementation method may be: in the frequency domain, according to the total number of the pilot subcarriers Obtaining a sub-carrier number of the pilot that carries a 20 MHz bandwidth and the number of the sub-carriers is half of the number of sub-carriers of the WLAN, and performing an expansion process on the sub-carrier number of the pilot to obtain the WLAN The subcarrier number carrying the pilot on the half of the bandwidth; determining the subcarrier carrying the pilot on the symmetric half of the bandwidth of the WLAN according to the subcarrier number carrying the pilot on the half bandwidth of the WLAN Serial number.

Further, the step 102 of the foregoing method embodiment is to determine, according to the total number of the pilot subcarriers, the subcarrier number of the pilot that carries the pilot in the frequency domain, and the specific implementation method may be: Selecting, in the frequency domain, the pilot in the WLAN from the number of 16 pilot-bearing subcarriers in the 160 MHz bandwidth system specified in the IEEE802.11ac according to the total number of pilot subcarriers. The subcarrier number, the number of the subcarrier numbers is equal to the total number of the pilot subcarriers, and the subcarrier numbers are evenly distributed over the entire bandwidth of the WLAN.

Further, in step 103 of the foregoing method embodiment, the pilot is uniformly received in the time domain. The specific implementation method may be: carrying the pilot on the symbol of the WLAN every at least one of the symbols on the symbol of the WLAN. Preferably, the pilot may be carried on every one or three of the symbols on the symbol of the WLAN on the time domain.

Specifically, when the apparatus in this embodiment deploys a pilot in the time domain, it is no longer a symbol, and may be at least one symbol-bearing pilot. Preferably, the pilot may be carried every other symbol. The pilot is carried every three symbols, which can reduce the overhead of the system carrying pilots and improve system throughput.

The principle of the foregoing method embodiment is similar to the principle of any device embodiment in FIG. 1 to FIG. 8, and details are not described herein again.

The method of the foregoing embodiment is separately deployed in the frequency domain and the time domain to determine the RE of the final bearer. The following describes several specific embodiments.

If the WLAN bandwidth is 20 MHz and the number of subcarriers is 128, in the frequency domain, determining that the total number of pilot subcarriers in the WLAN is four, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier number of the pilot in the WLAN is -42, -14, 14, 42, and the specific pilot distribution can be seen in FIG.

If the WLAN bandwidth is 20 MHz and the number of subcarriers is 256, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four, and in the frequency domain, according to The total number of the pilot subcarriers determines that the subcarriers carrying the pilots in the WLAN are -84, -28, 28, 84. The specific pilot distribution can be seen in FIG. 4A and FIG. 4B.

If the WLAN bandwidth is 20 MHz and the number of subcarriers is 512, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four, and in the frequency domain, according to The total number of the pilot subcarriers determines that the subcarriers carrying the pilots in the WLAN are -168, -56, 56, 168, and the specific pilot distribution can be seen in FIG.

If the WLAN bandwidth is 20 MHz and the number of subcarriers is 1024, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is four, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier number of the pilot in the WLAN is -336, -112, 112, 336, and the specific pilot distribution can be seen in FIG. 6.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 256, the total number of pilot subcarriers in the WLAN is determined to be six in the frequency domain, and in the frequency domain, according to The total number of the pilot subcarriers determines that the subcarriers carrying the pilots in the WLAN are -106, -50, -22, 22, 50, 106. The specific pilot distribution can be seen in FIG.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 256, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers of the pilots in the WLAN are -106, -78, -50, -22, 22, 50, 78, 106, and the specific pilot distribution may be See Figure 8.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 512, the total number of pilot subcarriers in the WLAN is determined to be six in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -212, -100, -44, 44, 100, 212.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 512, the total number of pilot subcarriers in the WLAN is determined to be eight in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -212, -156, -100, -44, 44, 100, 156, 212.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 1024, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is six, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -424, -200, -88, 88, 200, 424.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 1024, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -424, -312, -200, -88, 88, 200, 312, 424.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 2048, the total number of pilot subcarriers in the WLAN is determined to be six in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -848, -400, -176, 176, 400, 848.

If the WLAN bandwidth is 40 MHz and the number of subcarriers is 2048, in the frequency domain, determining a total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -848, -624, -400, -176, 176, 400, 624, 848. If the WLAN bandwidth is 80 MHz and the number of subcarriers is 512, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -206, -150, -78, -22, 22, 78, 150, 206.

If the WLAN bandwidth is 80 MHz and the number of subcarriers is 1024, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -412, -300, -156, -44, 44, 156, 300, 412.

If the WLAN bandwidth is 80 MHz and the number of subcarriers is 2048, in the frequency domain, determining that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -824, -600, -312, -88, 88, 312, 600, 824.

If the WLAN bandwidth is 80 MHz and the number of subcarriers is 4096, determining, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -1648, -1200, -624, -176, 176, 624, 1200, 1648.

If the WLAN bandwidth is 160 MHz and the number of subcarriers is 1024, the total number of pilot subcarriers in the WLAN is determined to be 16 in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -462, -406, -334, -278, -234, -178, -106, -50, 50, 106, 178, 234, 278, 334, 406, 462.

If the WLAN bandwidth is 160 MHz and the number of subcarriers is 2048, the total number of pilot subcarriers in the WLAN is determined to be 16 in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -924, -812, -668, -556, -468, -356, -212, -100, 100, 212, 356, 468, 556, 668, 812, 924.

If the WLAN bandwidth is 160 MHz and the number of subcarriers is 4096, the total number of pilot subcarriers in the WLAN is determined to be 16 in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -1848, -1624, -1336, -1112, -936, -712, -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848.

If the WLAN bandwidth is 160 MHz and the number of subcarriers is 8192, the total number of pilot subcarriers in the WLAN is determined to be 16 in the frequency domain, and in the frequency domain, according to The total number of pilot subcarriers determines that the subcarrier numbers carrying the pilots in the WLAN are -3696, -3248, -2672, -2224, -1872, -1424, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696.

FIG. 11 is a flowchart of Embodiment 2 of a method for processing a pilot of a wireless local area network according to the present invention. As shown in FIG. 11, the method in this embodiment may include:

Step 201: Receive a signal sent by the sending end device over the entire bandwidth of the WLAN of the wireless local area network;

The execution body of this embodiment may be a receiving end device, and the method of the embodiment is suitable for reducing the subcarrier spacing compared to the standard specified by the Institute of Electrical and Electronics Engineers IEEE 802.1 lac/1 la/1 lg/1 In, A wireless local area network WLAN system with increased number of subcarriers.

Step 202: Demodulate all the pilots from the received signal according to the subcarrier number carrying the pilot in the WLAN and the symbol of the WLAN, and acquire a phase according to the pilot.

^艮宗目息;

In this embodiment, after receiving the signal sent by the transmitting device, the receiving device demodulates the pilot according to the deployment of the pilot in the frequency domain and the time domain, and calculates the phase offset of the RE on the received symbol according to the pilot. The phase tracking information is determined, and the process is similar to the foregoing device embodiment, and details are not described herein again.

Step 203: Perform phase compensation on the data in the signal according to the phase tracking information and demodulate the data.

In this embodiment, the signal phase tracking information is obtained according to the deployment situation of the pilot in the frequency domain and the time domain, and the data in the signal is accurately demodulated, thereby improving system performance and throughput, and eliminating residual frequency generated by the system. The effects of bias and phase noise effectively reduce the packet error rate.

Further, step 202 of the foregoing method embodiment demodulates all the pilots from the received signal according to the subcarrier number carrying the pilot in the WLAN and the symbol of the WLAN, and according to the guide Obtaining phase tracking information, the specific implementation method may be: performing, according to the resource element RE corresponding to the subcarrier number of the bearer carrying pilot, on the first symbol of the WLAN that carries the pilot Pilot calculation to obtain a first phase offset on the RE; Calculating, according to the first phase offset, a second phase offset phase offset on the RE that does not carry the pilot by using a linear interpolation method; determining, by the residual according to the first phase offset and the second phase offset The phase deviation caused by the frequency offset and phase noise, and the phase tracking information is calculated.

Further, step 202 of the foregoing method embodiment demodulates all the pilots from the received signal according to the subcarrier number carrying the pilot in the WLAN and the symbol of the WLAN, and according to the guide Obtaining phase tracking information, the specific implementation method may be: calculating, according to the first phase offset, a linear interpolation method according to the first phase offset on the second symbol of the WLAN that does not carry the pilot a third phase offset on the RE of the same frequency band of the RE of the pilot; calculating a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot by linear interpolation according to the third phase offset Shifting; determining a phase deviation caused by residual frequency offset and phase noise based on the third phase offset and the fourth phase offset, and calculating the phase tracking information. The method of calculating the third phase offset may be, according to the second symbol of the WLAN that does not carry the pilot, according to the first phase offset on the first symbol before the second symbol Calculating the third phase offset on the second symbol by using a method of linear interpolation, and may also be on the second symbol of the WLAN that does not carry the pilot, according to the second symbol The first phase offset on the first symbol before and after is calculated using a linear interpolation method to calculate the third phase offset on the second symbol.

The principle of the foregoing method embodiment is similar to the principle of the device embodiment shown in FIG. 9, and is not described here.

12 is a schematic structural diagram of an embodiment of a transmitting device according to the present invention. As shown in FIG. 12, the device in this embodiment is applicable to a standard specified by IEEE 802.11ac/l la/llg/lln of the Institute of Electrical and Electronics Engineers. The WLAN that reduces the subcarrier spacing and increases the number of subcarriers may include: a processor 11 and a transmitter 12, where the processor 11 is configured to determine, in the frequency domain, the total number of pilot subcarriers in the WLAN in the WLAN. Determining, in the frequency domain, a subcarrier number of a pilot that carries a pilot in the WLAN according to a total number of the pilot subcarriers; and, in the time domain, uniformly transmitting the pilot to a symbol of the WLAN The transmitter 12 is configured to send a signal to the receiving end device according to the subcarrier serial number carrying the pilot and the symbol, so that the receiving end device acquires phase tracking according to the pilot in the signal. The information, in turn, phase compensates and demodulates the data in the signal.

The device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 10, The implementation principle is similar to the technical effect, and will not be described here.

Further, the processor 11 is specifically configured to, in the frequency domain, deploy the pilot symmetrically and uniformly on both sides of the DC subcarrier of the WLAN according to the total number of the pilot subcarriers, to Determining the subcarrier number of the pilot bearer; or, in the frequency domain, uniformly deploying the pilot on the entire bandwidth of the WLAN according to the total number of the pilot subcarriers, to determine The subcarrier number carrying the pilot.

Further, the processor 11 is specifically configured to acquire the subcarriers of the WLAN with the same number of subcarriers as the WLAN bandwidth specified in the Institute of Electrical and Electronics Engineers IEEE802.11ac/lla/llg/l a multiple of the number of expansions; in the frequency domain, the same as the WLAN bandwidth specified in the IEEE 802.1 lac/1 la/1 lg/1 In according to the total number of pilot subcarriers The subcarrier number carrying the pilot in the system is expanded by the multiple, and the subcarrier number carrying the pilot in the WLAN is obtained.

Further, if the bandwidth of the WLAN is 40 MHz, the processor 11 is specifically configured to determine, in the frequency domain, that the total number of pilot subcarriers in the WLAN is eight; The subcarrier number of the pilot that acquires the 20 MHz bandwidth according to the total number of the pilot subcarriers and the number of the subcarriers is half of the number of subcarriers of the WLAN, and the pilot The frequency subcarrier sequence number is expanded to obtain a subcarrier number carrying the pilot on a half of the bandwidth of the WLAN; determining a symmetry of the WLAN according to a subcarrier number carrying the pilot on a half bandwidth of the WLAN The other half of the bandwidth carries the subcarrier number of the pilot.

Further, the processor 11 is specifically configured to, in the frequency domain, 16 pilot-bearing subcarriers in a 160 MHz bandwidth system specified in the IEEE802.11ac according to the total number of the pilot subcarriers. The number of the subcarriers carrying the pilots in the WLAN is selected, the number of the subcarrier numbers is equal to the total number of the pilot subcarriers, and the subcarrier number is in the entire bandwidth of the WLAN. Evenly distributed.

Further, the processor 11 is specifically configured to carry the pilot every at least one of the symbols on the symbol of the WLAN in the time domain. Preferably, the processor 11 is specifically configured to carry the pilot every other one or three of the symbols on the symbol of the WLAN in the time domain.

FIG. 13 is a schematic structural diagram of an embodiment of a receiving end device according to the present invention. As shown in FIG. 13, the device in this embodiment is applicable to an IEEE802.11ac/l la/llg/l ln specification of the Institute of Electrical and Electronics Engineers. The predetermined standard, the WLAN with reduced subcarrier spacing and the number of subcarriers is increased, and may include: a receiver 11 and a processor 12, where the receiver 11 is configured to receive the transmitting device and send the entire bandwidth of the WLAN over the WLAN. The processor 12 is configured to demodulate all the pilots from the received signal according to the subcarrier sequence number carrying the pilot in the WLAN and the symbol of the WLAN, and according to the pilot Acquiring phase tracking information; phase compensating data in the signal according to the phase tracking information and demodulating the data.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 11. The implementation principle and technical effects are similar, and details are not described herein again.

Further, the processor 12 is specifically configured to calculate, according to the pilot element carried on the resource element RE corresponding to the subcarrier number of the bearer pilot, on the first symbol of the WLAN that carries the pilot Obtaining a first phase offset on the RE; calculating, by using a linear interpolation method, a second phase offset phase offset on an RE that does not carry the pilot according to the first phase offset; The phase offset and the second phase offset determine a phase deviation caused by residual frequency offset and phase noise, and calculate the phase tracking information.

Further, the processor 12 is specifically configured to calculate, by using a linear interpolation method, the method for performing the pilot according to the first phase offset on a second symbol of the WLAN that does not carry the pilot. a third phase offset on the RE of the same frequency band; calculating, according to the third phase offset, a fourth phase offset on the RE of the different frequency band of the RE carrying the pilot by using a linear interpolation method; The third phase offset and the fourth phase offset determine a phase deviation caused by residual frequency offset and phase noise, and calculate the phase tracking information.

Further, the processor 12 is specifically configured to, according to the second symbol of the WLAN that does not carry the pilot, according to the first phase offset on the first symbol before the second symbol Calculating the third phase offset on the second symbol by using a method of linear interpolation; calculating, by using a linear interpolation method, a RE of a different frequency band from the RE carrying the pilot according to the third phase offset a fourth phase offset; determining a phase deviation caused by residual frequency offset and phase noise based on the third phase offset and the fourth phase offset, and calculating the phase tracking information.

Further, the processor 12 is specifically configured to: according to the second symbol of the WLAN that does not carry the pilot, according to the first symbol on the first symbol before and after the second symbol Phase offset using a method of linear interpolation to calculate the third phase offset on the second symbol; calculating, by the method of linear interpolation, the RE carrying the pilot according to the third phase offset a fourth phase offset on the RE of the different frequency bands; determining a phase deviation caused by the residual frequency offset and the phase noise based on the third phase offset and the fourth phase offset, and calculating the phase tracking information.

14 is a schematic structural diagram of Embodiment 1 of a communication system according to the present invention. As shown in FIG. 14, the system of this embodiment is applicable to the IEEE 802.1 lac/1 la/1 lg/1 In specified by the Institute of Electrical and Electronics Engineers. The standard, the sub-carrier spacing is reduced, and the number of sub-carriers is increased. The WLAN includes: a transmitting device 11 and a receiving device 12, wherein the transmitting device 11 can adopt the structure of any device embodiment of FIG. 1 to FIG. Correspondingly, the technical solution of the method embodiment shown in FIG. 10 can be performed, and the implementation principle and technical effects are similar, and details are not described herein. The receiving end device 12 can adopt the structure of the device embodiment shown in FIG. The technical solution of the method embodiment shown in FIG. 11 can be performed, and the implementation principle and the technical effect are similar, and details are not described herein again.

15 is a schematic structural diagram of Embodiment 2 of a communication system according to the present invention. As shown in FIG. 15, the system of this embodiment is applicable to a standard specified by IEEE 802.11ac/l la/llg/lln of the Institute of Electrical and Electronics Engineers. The WLAN that reduces the number of subcarriers and the number of subcarriers is reduced, and includes: a transmitting device 21 and a receiving device 22, wherein the transmitting device 21 can adopt the structure of the device embodiment shown in FIG. 12, which can be executed correspondingly. The technical solution of the method embodiment shown in FIG. 10 is similar to the technical effect, and is not described here. The receiving device 22 can adopt the structure of the device embodiment shown in FIG. 13 , and correspondingly, FIG. 11 can be executed. The technical solution of the method embodiment is similar, and the implementation principle and the technical effect are similar, and details are not described herein again.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in various embodiments of the present invention may be integrated into one processing unit In addition, each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the method of various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A sending end device, characterized in that it includes:

The pilot number determination module is used to determine the total number of pilot subcarriers in the wireless local area network WLAN in the frequency domain;

A frequency domain deployment module, configured to determine, in the frequency domain, the subcarrier serial number that carries the pilot in the WLAN according to the total number of the pilot subcarriers;

A time domain deployment module, configured to carry the pilot evenly in the WLAN symbols in the time domain;

A signal sending module, configured to send a signal to the receiving end device according to the subcarrier serial number and the symbol carrying the pilot, so that the receiving end device obtains phase tracking information according to the pilot in the signal, Then, the data in the signal is phase compensated and demodulated.

2. The device according to claim 1, wherein the frequency domain deployment module is specifically configured to symmetrically and uniformly arrange the pilots in the frequency domain according to the total number of pilot subcarriers. be deployed on both sides of the DC subcarrier of the WLAN to determine the subcarrier serial number carrying the pilot; or,

In the frequency domain, the pilots are evenly deployed over the entire bandwidth of the WLAN according to the total number of pilot subcarriers to determine the subcarrier serial number carrying the pilots.

3. The device according to claim 1, characterized in that the frequency domain deployment module is specifically used to obtain the number of subcarriers of the WLAN compared with the Institute of Electrical and Electronics Engineers IEEE802.1 lac/1 la/1 The multiple of the expansion of the number of subcarriers of the system with the same bandwidth as the WLAN specified in lg/1 In; In the frequency domain, the IEEE802.1 lac/1 la is expanded according to the total number of pilot subcarriers. The subcarrier serial number carrying the pilot in the system with the same bandwidth as the WLAN specified in /1 lg/1 In is expanded by the multiple to obtain the subcarrier serial number carrying the pilot in the WLAN.

4. The device according to claim 1, wherein if the bandwidth of the WLAN is

40 MHz and the pilot number determination module is specifically used to determine the total number of pilot subcarriers in the WLAN to be 8 in the frequency domain, then the frequency domain deployment module is specifically used to In the frequency domain, a system with a bandwidth of 20MHz is obtained based on the total number of pilot subcarriers and the number of subcarriers is half of the number of subcarriers of the WLAN to carry the subcarrier serial number of the pilot. , expand the subcarrier number of the pilot to obtain half the bandwidth of the WLAN The subcarrier serial number carrying the pilot is determined according to the subcarrier serial number carrying the pilot in half the bandwidth of the WLAN to determine the subcarrier serial number carrying the pilot in the other symmetrical half bandwidth of the WLAN.

5. The device according to claim 1, wherein the frequency domain deployment module is specifically configured to specify in the frequency domain according to the total number of pilot subcarriers specified in the IEEE802.11ac The subcarrier serial number carrying the pilot in the WLAN is selected from the 16 subcarrier serial numbers carrying the pilot in the 160MHz bandwidth system. The number of the subcarrier serial numbers is equal to the total number of the pilot subcarriers. are equal, and the subcarrier serial numbers are evenly distributed over the entire bandwidth of the WLAN.

6. The device according to any one of claims 1 to 5, characterized in that the time domain deployment module is specifically configured to place at least every other symbol on the WLAN symbol in the time domain. The symbol carries the pilot.

7. The device according to claim 6, characterized in that the time domain deployment module is specifically configured to carry every one or three symbols on the WLAN symbols in the time domain. Describe the pilot.

8. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 20MHz and the number of subcarriers is 128, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -42, -14, 14, and 42.

9. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 20MHz and the number of subcarriers is 256, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -84, -28, 28, and 84.

10. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 20MHz and the number of subcarriers is 512, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -168, -56, 56, and 168.

11. The device according to any one of claims 1 to 7, characterized in that if the WLAN bandwidth is 20MHz and the number of subcarriers is 1024, the pilot number determination module is specifically used In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -336, -112, 112, 336.

12. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 256, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 6; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -106, -50, -22, 22, 50, and 106.

13. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 256, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -106, -78, -50, -22, 22, 50, 78, and 106.

14. The device according to any one of claims 1 to 7, characterized in that, if the

The WLAN bandwidth is 40MHz and the number of subcarriers is 512. Then the pilot number determination module is specifically used to determine the total number of pilot subcarriers in the WLAN to be 6 in the frequency domain; so The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers as -212, -100, -44, 44, 100, 212.

15. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 512, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8; the frequency domain deployment module is specifically used in the frequency domain, according to the total number of pilot subcarriers It is determined that the subcarrier serial numbers carrying the pilot in the WLAN are -212, -156, -100, —44, 44, 100, 156, 212.

16. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 1024, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 6;

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -424, -200, -88. , 88, 200, 424.

17. The device according to any one of claims 1 to 7, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 1024, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -424, -312, -200. , -88, 88, 200, 312, 424.

18. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 2048, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 6.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -848, -400, -176. , 176, 400, 848.

19. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 40MHz and the number of subcarriers is 2048, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -848, -624, -400. , -176, 176, 400, 624, 848.

20. The device according to any one of claims 1 to 7, characterized in that, if the The WLAN bandwidth is 80MHz and the number of subcarriers is 512. Then the pilot number determination module is specifically used to determine the total number of pilot subcarriers in the WLAN to be 8 in the frequency domain; so The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -206, -150, -78, -22, 22, 78, 150, 206.

21. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 80MHz and the number of subcarriers is 1024, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -412, -300, -156. , —44, 44, 156, 300, 412.

22. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 80MHz and the number of subcarriers is 2048, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -824, -600, -312. , -88, 88, 312, 600, 824.

23. The device according to any one of claims 1 to 7, characterized in that, if the

The WLAN bandwidth is 80MHz and the number of subcarriers is 4096. The pilot number determination module is specifically used to determine the total number of pilot subcarriers in the WLAN to be 8 in the frequency domain.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -1648, -1200, -624. , -176, 176, 624, 1200, 1648.

24. The device according to any one of claims 1 to 7, characterized in that if the WLAN bandwidth is 160MHz and the number of subcarriers is 1024, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 16; The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -462, -406, -334. , -278, -234, -178, -106, -50, 50, 106, 178, 234, 278, 334, 406, 462.

25. The device according to any one of claims 1 to 7, characterized in that if the WLAN bandwidth is 160MHz and the number of subcarriers is 2048, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 16.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -924, -812, -668. , -556, -468, -356, -212, -100, 100, 212, 356, 468, 556, 668, 812, 924.

26. The device according to any one of claims 1 to 7, characterized in that, if the WLAN bandwidth is 160MHz and the number of subcarriers is 4096, the pilot number determination module is specifically used for In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 16;

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -1848, -1624, -1336. , -1112, -936, -712, -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848.

27. The device according to any one of claims 1 to 7, characterized in that, if the

The WLAN bandwidth is 160MHz and the number of subcarriers is 8192. The pilot number determination module is specifically used to determine the total number of pilot subcarriers in the WLAN to 16 in the frequency domain.

The frequency domain deployment module is specifically configured to determine, in the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN according to the total number of the pilot subcarriers to be -3696, -3248, -2672. , -2224, -1872, -1424, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696.

28. A receiving end device, characterized in that it includes:

The signal receiving module is used to receive signals sent by the sending device over the entire bandwidth of the wireless local area network WLAN; A pilot processing module, configured to demodulate all the pilots from the received signal according to the subcarrier number carrying the pilot in the WLAN and the symbol of the WLAN, and obtain the phase according to the pilot tracking information;

A data demodulation module, configured to perform phase compensation on the data in the signal according to the phase tracking information and demodulate the data.

29. The device according to claim 28, characterized in that the pilot processing module is specifically configured to, on the first symbol of the WLAN carrying the pilot, according to the sub-symbol carrying the pilot. Calculate the pilot carried on the resource element RE corresponding to the carrier number to obtain the first phase offset on the RE; use the linear interpolation method to calculate the first phase offset on the RE that does not carry the pilot based on the first phase offset. a second phase offset of a phase offset; determining a phase deviation caused by residual frequency offset and phase noise according to the first phase offset and the second phase offset, and calculating the phase tracking information.

30. The device according to claim 28 or 29, characterized in that, the pilot processing module is specifically configured to, on the second symbol of the WLAN that does not carry the pilot, according to the first phase The offset uses a linear interpolation method to calculate the third phase offset on the RE in the same frequency band as the RE carrying the pilot; according to the third phase offset, the linear interpolation method is used to calculate the third phase offset related to the RE carrying the pilot. A fourth phase offset on REs in different frequency bands of REs of the pilot; determining the phase deviation caused by residual frequency offset and phase noise according to the third phase offset and the fourth phase offset, and calculating the phase tracking information .

31. The device according to claim 30, wherein the pilot processing module is specifically configured to: on the second symbol of the WLAN that does not carry the pilot, according to the second symbol The first phase offset on the previous first symbol is calculated using a linear interpolation method to calculate the third phase offset on the second symbol; and a linear interpolation method is used based on the third phase offset. Calculate the fourth phase offset on the RE in a different frequency band from the RE carrying the pilot; determine the phase deviation caused by the residual frequency offset and phase noise according to the third phase offset and the fourth phase offset, and calculate the phase tracking information.

32. The device according to claim 30, wherein the pilot processing module is specifically configured to: on the second symbol of the WLAN that does not carry the pilot, according to the second symbol The first phase offset on the first symbol before and after is calculated using a linear interpolation method to calculate the third phase offset on the second symbol; according to the third phase offset, Calculate the fourth phase offset on the RE in a different frequency band from the RE carrying the pilot using a linear interpolation method; determine based on the third phase offset and the fourth phase offset caused by the residual frequency offset and phase noise phase deviation, and calculate the phase tracking information.

33. A pilot processing method for a wireless local area network, characterized by including:

In the frequency domain, determine the total number of pilot subcarriers in the wireless local area network WLAN;

In the frequency domain, determine the subcarrier serial number that carries the pilot in the WLAN according to the total number of the pilot subcarriers;

In the time domain, the pilot is evenly carried in the WLAN symbols;

Send a signal to the receiving end device according to the subcarrier serial number and the symbol carrying the pilot, so that the receiving end device obtains phase tracking information according to the pilot in the signal, and then performs phase tracking in the signal The data is phase compensated and demodulated.

34. The method according to claim 33, characterized in that, in the frequency domain, determining the subcarrier serial number carrying the pilot in the WLAN according to the total number of the pilot subcarriers includes:

In the frequency domain, the pilots are symmetrically and evenly deployed on both sides of the DC subcarriers of the WLAN according to the total number of pilot subcarriers to determine the subcarrier serial number carrying the pilot. ; or,

35. The method according to claim 33, characterized in that, in the frequency domain, before determining the subcarrier serial number carrying pilot in the WLAN according to the total number of pilot subcarriers, further comprising: Γ

Obtain the multiple of the expansion of the number of subcarriers of the WLAN compared to the number of subcarriers of a system with the same bandwidth as the WLAN specified in the Institute of Electrical and Electronics Engineers IEEE802.11ac/lla/l lg/lln;

Determining the subcarrier serial number carrying pilot in the WLAN according to the total number of pilot subcarriers in the frequency domain includes:

In the frequency domain, the pilot subcarriers are carried in the system with the same bandwidth as the WLAN specified in the IEEE802.1 lac/1 la/1 lg/1 In according to the total number of the pilot subcarriers. The subcarrier serial number of is expanded by the multiple to obtain the subcarrier carrying the pilot in the WLAN Carrier serial number.

36. The method according to claim 33, wherein if the bandwidth of the WLAN is 40 MHz and in the frequency domain, the total number of pilot subcarriers in the WLAN is determined to be 8, Then, in the frequency domain, determining the subcarrier serial number carrying the pilot in the WLAN according to the total number of the pilot subcarriers includes:

In the frequency domain, a system with a 20MHz bandwidth is obtained based on the total number of pilot subcarriers and the number of subcarriers is half of the number of subcarriers of the WLAN to carry the subcarrier serial number of the pilot. , perform an expansion process on the subcarrier number of the pilot to obtain the subcarrier number that carries the pilot on half the bandwidth of the WLAN;

Determine the subcarrier number based on the subcarrier number carrying the pilot on half the bandwidth of the WLAN

The subcarrier sequence number of the pilot is carried on the other half of the symmetrical bandwidth of the WLAN.

37. The method according to claim 33, characterized in that, in the frequency domain, determining the subcarrier serial number carrying pilots in the WLAN according to the total number of pilot subcarriers includes:

In the frequency domain, according to the total number of the pilot subcarriers, the WLAN carrying pilot subcarriers are selected from the 16 pilot subcarrier serial numbers in the 160MHz bandwidth system specified in the IEEE802.11ac. The sub-carrier serial number of the pilot, the number of the sub-carrier serial numbers is equal to the total number of the pilot sub-carriers, and the sub-carrier serial numbers are evenly distributed over the entire bandwidth of the WLAN.

38. The method according to any one of claims 33 to 37, characterized in that, in the time domain, the pilot is evenly carried in the WLAN symbols, including:

In the time domain, the pilot is carried on at least every other symbol of the WLAN.

39. The method according to claim 38, characterized in that, in the time domain, carrying the pilot evenly in the WLAN symbols includes:

In the time domain, the pilot is carried on every one or three symbols of the WLAN.

40. The method according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 20 MHz and the number of subcarriers is 128, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4; In the frequency domain, determining the subcarrier serial number that carries the pilot in the WLAN according to the total number of the pilot subcarriers includes:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -42, -14, 14, and 42 based on the total number of the pilot subcarriers.

41. The device according to any one of claims 33 to 39, characterized in that if the

The WLAN bandwidth is 20MHz and the number of subcarriers is 256. Then in the frequency domain, the total number of pilot subcarriers in the wireless local area network WLAN is determined, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 4; and in the frequency domain, it is determined that the number of pilot subcarriers in the WLAN is carried according to the total number of pilot subcarriers. subcarrier serial number, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -84, -28, 28, and 84 based on the total number of the pilot subcarriers.

42. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 20 MHz and the number of subcarriers is 512, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -168, -56, 56, and 168 based on the total number of the pilot subcarriers.

43. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 20 MHz and the number of subcarriers is 1024, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -336, -112, 112, and 336 based on the total number of the pilot subcarriers.

44. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 256, then in the frequency domain, it is determined that the wireless The total number of pilot subcarriers in the local area network WLAN, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 6; and in the frequency domain, it is determined that the number of pilot subcarriers carried in the WLAN is 6. subcarrier serial number, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -106, -50, -22, 22, 50, and 106 based on the total number of the pilot subcarriers.

45. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 256, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8; and in the frequency domain, it is determined that the number of pilot subcarriers in the WLAN is carried according to the total number of pilot subcarriers. subcarrier serial number, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -106, -78, -50, -22, 22, 50, 78, based on the total number of the pilot subcarriers. 106.

46. The device according to any one of claims 33 to 39, characterized in that, if the

The WLAN bandwidth is 40MHz and the number of subcarriers is 512. Then in the frequency domain, the total number of pilot subcarriers in the wireless local area network WLAN is determined, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -212, -100, -44, 44, 100, and 212 based on the total number of the pilot subcarriers.

47. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 512, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -212, -156, -100, -44, 44, 100, 156, based on the total number of the pilot subcarriers. 212.

48. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 1024, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -424, -200, -88, 88, 200, and 424 based on the total number of the pilot subcarriers.

49. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 1024, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -424, -312, -200, -88, 88, 200, 312, based on the total number of the pilot subcarriers. 424.

50. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 40MHz and the number of subcarriers is 2048, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -848, -400, -176, 176, 400, 848 based on the total number of the pilot subcarriers.

51. The device according to any one of claims 33 to 39, characterized in that if the

The WLAN bandwidth is 40MHz and the number of subcarriers is 2048. Then in the frequency domain, the total number of pilot subcarriers in the wireless local area network WLAN is determined, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8; and in the frequency domain, it is determined that the number of pilot subcarriers carried in the WLAN is 8. subcarrier serial number, including: In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -848, -624, -400, -176, 176, 400, 624, based on the total number of the pilot subcarriers. 848.

52. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 80MHz and the number of subcarriers is 512, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -206, -150, -78, -22, 22, 78, 150, based on the total number of the pilot subcarriers. 206.

53. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 80MHz and the number of subcarriers is 1024, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -412, -300, -156, -44, 44, 156, 300, based on the total number of the pilot subcarriers. 412.

54. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 80MHz and the number of subcarriers is 2048, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -824, -600, -312, -88, 88, 312, 600, based on the total number of the pilot subcarriers. 824.

55. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 80MHz and the number of subcarriers is 4096, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 8; In the frequency domain, determining the subcarrier serial number that carries the pilot in the WLAN according to the total number of the pilot subcarriers includes:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined according to the total number of the pilot subcarriers to be -1648, -1200, -624, -176, 176, 624, 1200, 1648.

56. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 160MHz and the number of subcarriers is 1024, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, it is determined that the total number of pilot subcarriers in the WLAN is 16; and in the frequency domain, it is determined that the number of pilot subcarriers carried in the WLAN is 16. subcarrier serial number, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -462, -406, -334, -278, -234, -178, based on the total number of the pilot subcarriers. -106, -50, 50, 106, 178, 234, 278, 334, 406, 462.

57. The device according to any one of claims 33 to 39, characterized in that, if the

The WLAN bandwidth is 160MHz and the number of subcarriers is 2048. Then in the frequency domain, the total number of pilot subcarriers in the wireless local area network WLAN is determined, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined to be -924, -812, -668, -556, -468, -356, based on the total number of the pilot subcarriers. -212, -100, 100, 212, 356, 468, 556, 668, 812, 924.

58. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 160MHz and the number of subcarriers is 4096, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, determine the number of carriers in the WLAN according to the total number of pilot subcarriers. The subcarrier serial numbers of the pilot are -1848, -1624, -1336, -1112, -936, -712, -424, -200, 200, 424, 712, 936, 1112, 1336, 1624, 1848.

59. The device according to any one of claims 33 to 39, characterized in that if the WLAN bandwidth is 160MHz and the number of subcarriers is 8192, then in the frequency domain, the wireless local area network WLAN is determined The total number of mid-pilot subcarriers, including:

In the frequency domain, the subcarrier serial numbers carrying the pilot in the WLAN are determined according to the total number of the pilot subcarriers to be -3696, -3248, -2672, -2224, -1872, -1424, -848, -400, 400, 848, 1424, 1872, 2224, 2672, 3248, 3696.

60. A pilot processing method for a wireless local area network, characterized by including:

Receive the signal sent by the sending end device over the entire bandwidth of the wireless local area network WLAN; demodulate all the pilots from the received signal according to the subcarrier serial number carrying the pilot in the WLAN and the symbol of the WLAN , and obtain phase tracking information according to the pilot; perform phase compensation on the data in the signal and demodulate the data according to the phase tracking information.

61. The method according to claim 60, characterized in that: demodulating all the pilots from the received signal based on the subcarrier serial number carrying the pilot in the WLAN and the symbol of the WLAN. frequency, and obtain phase tracking information based on the pilot frequency, including:

On the first symbol of the WLAN carrying the pilot, calculate and obtain the first phase offset on the RE based on the pilot carried on the resource element RE corresponding to the subcarrier number carrying the pilot. move;

Calculate the second phase offset phase offset on the RE that does not carry the pilot according to the first phase offset using a linear interpolation method;

Determine the phase deviation caused by the residual frequency deviation and the phase noise according to the first phase offset and the second phase offset, and calculate the phase tracking information.

62. The method according to claim 60 or 61, characterized in that, according to the subcarrier serial number carrying pilot in the WLAN and the symbol of the WLAN, all the signals are demodulated from the received signal. The pilot frequency is described, and phase tracking information is obtained according to the pilot frequency, including: On the second symbol of the WLAN that does not carry the pilot, use the linear interpolation method to calculate a third phase offset on the RE in the same frequency band as the RE carrying the pilot according to the first phase offset. ;

Calculate the fourth phase offset on the RE in a different frequency band from the RE carrying the pilot according to the third phase offset using a linear interpolation method;

Determine a phase deviation caused by residual frequency deviation and phase noise according to the third phase offset and the fourth phase offset, and calculate the phase tracking information.

63. The method according to claim 62, characterized in that, on the second symbol of the WLAN that does not carry the pilot, the linear interpolation method is used to calculate the relationship between the first phase offset and the second symbol of the WLAN that does not carry the pilot. The third phase offset on the RE carrying the pilot in the same frequency band includes: on the second symbol of the WLAN that does not carry the pilot, based on all the symbols before the second symbol. The first phase offset on the first symbol uses a linear interpolation method to calculate the third phase offset on the second symbol.

64. The method according to claim 62, characterized in that, on the second symbol of the WLAN that does not carry the pilot, the linear interpolation method is used to calculate the relationship between the first phase offset and the second symbol of the WLAN that does not carry the pilot. The third phase offset on the RE carrying the pilot in the same frequency band includes: on the second symbol of the WLAN that does not carry the pilot, according to before and after the second symbol The first phase offset on the first symbol uses a linear interpolation method to calculate the third phase offset on the second symbol.

65. A communication system, characterized in that it includes: a sending end device and a receiving end device, wherein the sending end device adopts the device according to any one of claims 1 to 27; the receiving end device adopts the right The device according to any one of requirements 28 to 32.