WO2018045490A1 - Pilot symbol sending method and apparatus - Google Patents

Abstract

The present invention relates to the technical field of computing. Disclosed are a pilot symbol sending method and apparatus. The method comprises: first, a sending end can determine a value of signal interference of multiple interference resource blocks to a target resource block according to a carrier function in the target resource block for sending a pilot symbol and a data symbol and a carrier function in the multiple interference resource blocks corresponding to the target resource block, then can remove a component corresponding to the value of the signal interference from an initial pilot symbol so as to obtain a new pilot symbol, and then sends the new pilot symbol by means of the target resource block. By using the present disclosure, less time-frequency resources are consumed in a process of sending a pilot symbol.

Description

Method and device for transmitting pilot symbols Technical field

The present disclosure relates to the field of wireless communications, and in particular, to a method and apparatus for transmitting pilot symbols.

Background technique

During the transmission process of the signal from the transmitting end to the receiving end, due to the influence of terrain or obstacles, reflection, diffraction, diffraction, etc. may occur, and the signals received by the receiving end are superposed by signals that have undergone different transmission paths. The difference in phase and delay of the signals of different transmission paths will cause the amplitude and phase fluctuation of the superposed signals, and the above process is the channel fading phenomenon.

In the process of transmitting data using the filter bank multi-carrier technique, the transmitting end generally uses shift quadrature amplitude modulation to modulate the data so that the data symbols and other resource blocks on each resource block in the time-frequency two-dimensional grid The interference caused by the data symbols on them is orthogonal in phase, so that the receiving end can obtain data symbols that are unaffected by the interference.

However, the channel fading existing in the actual channel will destroy the phase orthogonality between the data symbols and the interference. In order to restore the interference and the orthogonality of the data symbols, the receiving end needs to according to the channel fading value experienced by the data symbols during transmission. Design a suitable equalizer to compensate for the effects of channel fading. In the process of determining the channel fading value, the receiving end and the transmitting end may agree on the pilot symbol first, and then the transmitting end modulates and transmits the pilot symbol, and the receiving end may according to the received pilot symbol and the pre-agreed agreement. The pilot symbols estimate the channel fading value of the channel. However, in the process of transmitting the pilot symbols, the pilot symbols are affected by the channel fading, and are also interfered by the data symbols on the adjacent resource blocks, so that accurate channel fading values cannot be obtained.

In order to avoid the influence of the foregoing interference on the pilot symbols, when transmitting the pilot symbols, the transmitting end may first determine a resource block other than the resource block in which the pilot symbols are located to transmit the auxiliary pilot symbols, and determine the auxiliary pilot symbols. And the interference of the data symbols on the other resource blocks outside the resource block where the pilot symbols are located on the pilot symbols, and then design the auxiliary pilot symbols, so that the auxiliary pilot symbols interfere with the pilot symbols, and other resource blocks The interference of the data symbols to the pilot symbols cancels each other out. In this way, the receiving end can receive the pilot symbols that are not affected by the interference, so that the received pilot symbols can be determined according to the received pilot symbols. Channel fading value.

In carrying out the process of the present disclosure, the inventors found that at least the following problems exist in the above processing:

The auxiliary pilot symbols will occupy additional time-frequency resource blocks, so that more time-frequency resources are consumed in the process of transmitting pilot symbols.

Summary of the invention

In order to solve the above problem, the embodiments of the present disclosure provide a method and apparatus for transmitting pilot symbols. The technical solution is as follows:

In a first aspect, a method of transmitting a pilot symbol is provided, the method comprising:

The transmitting end may first determine, according to the data symbols and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block, the signals of the multiple interference resource blocks corresponding to the target resource block to the target resource block. Interference value; the transmitting end may determine the pilot symbol to be transmitted of the target resource block according to the initial pilot symbol of the target resource block and the foregoing signal interference value; then the transmitting end may send the foregoing to the receiving end through the target resource block. The determined pilot symbol.

In the solution shown in the embodiment of the present disclosure, the transmitting end may first determine the signal interference value of the pilot symbol according to the data symbol and the carrier function in each resource block, and then add the initial pilot symbol before transmitting the pilot symbol. The offset amount used to cancel the signal interference, so that the purpose of eliminating the signal interference can be achieved without using other resource blocks, and therefore, the time-frequency resources consumed in the process of transmitting the pilot symbols are less.

In a possible implementation, the transmitting end determines the pilot symbol to be sent of the target resource block according to the initial pilot symbol and the signal interference value of the target resource block, including: the initial pilot that the transmitting end can be in the target resource block. The determined signal interference value is subtracted from the symbol, and then the pilot symbol of the target resource block to be transmitted can be obtained.

In a possible implementation manner, the method further includes: receiving, by the transmitting end, a channel fading value of the plurality of target resource blocks sent by the receiving end; and determining, by the transmitting end, the pilot symbol to be transmitted according to the channel fading value of the multiple target resource blocks a channel fading value of the plurality of interfering resource blocks corresponding to the first target resource block; the transmitting end according to the data symbol and the carrier function in the plurality of interfering resource blocks corresponding to the first target resource block, and a carrier function in the first target resource block And a channel fading value corresponding to the plurality of interference resource blocks corresponding to the first target resource block, determining a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block; and the transmitting end is according to the first target Determining the first target resource by using an initial pilot symbol of the resource block and a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block a pilot symbol to be transmitted of the block; the transmitting end sends, by the first target resource block, a pilot symbol to be transmitted of the first target resource block to the receiving end.

In the solution shown in the embodiment of the present disclosure, the receiving end may return the determined channel fading value of each channel to the transmitting end, so that the transmitting end may correspond to each resource block when estimating the signal interference value received by the pilot symbol. The channel fading value is taken into consideration, so that the estimated signal interference value has high accuracy. Correspondingly, the pilot symbol received by the receiving end can accurately reflect the channel fading value of each channel.

In a second aspect, a method for transmitting a pilot symbol is provided, the method comprising:

The sending end acquires a preset second carrier function, and determines a first carrier function orthogonal to the second carrier function at the preset time-frequency position;

The transmitting end modulates the pilot symbols by using the first carrier function, transmits the modulated pilot symbols to the receiving end, and modulates the data symbols by the second carrier function, and transmits the modulated data symbols to the receiving end.

In the solution shown in the embodiment of the present disclosure, the transmitting end may determine a first carrier function that is orthogonal at a preset time-frequency position according to a preset second carrier function, and then separately use the two carrier functions to respectively perform data on the data. The symbol and the pilot symbol are modulated, so that the signal interference of the data symbol to the pilot symbol during signal transmission can be effectively avoided, and no other resource blocks are needed, so the time-frequency resource consumed in the process of transmitting the pilot symbol is avoided. less.

In a possible implementation manner, the spectral main lobe widths of the plurality of sub-functions of the first carrier function are all less than a preset threshold.

In a possible implementation, the sending end acquires a preset second carrier function, and determines a first carrier function that is orthogonal to the second carrier function at the preset time-frequency position, including: the sending end acquires the preset number The two carrier function is calculated such that the first formula of the first carrier function and the second carrier function has a value of zero at a preset time-frequency position, and a weighting coefficient corresponding to each sub-function of the first carrier function is required, wherein The first formula is a preset formula for reacting the correlation between the second carrier function and the first carrier function after shifting in the time-frequency domain; determining the first according to the weighting coefficient corresponding to each sub-function A carrier function.

In the solution shown in the embodiment of the present disclosure, the transmitting end first calculates an algorithm for calculating two function correlations, and calculates a first carrier function in a preset time-frequency position that is orthogonal to the preset second carrier function. , the weighting coefficient corresponding to each sub-function, and then determining the first load according to the weighting coefficient corresponding to each sub-function The wave function, so that the required first carrier function can be accurately obtained.

In one possible implementation, the first carrier function is an even function and/or a real function.

In the solution shown in the embodiment of the present disclosure, the correlation function property of the first carrier function may be first defined, so that the solution calculation of the first carrier function may be simplified.

In a third aspect, a transmitting end is provided, where the transmitting end includes a processor and a transceiver; and the processor implements the method for transmitting a pilot symbol provided by the foregoing first aspect by executing an instruction.

A fourth aspect provides a transmitting end, where the transmitting end includes a processor and a transceiver; and the processor implements the method for transmitting the pilot symbols provided by the foregoing second aspect by executing an instruction.

In a fifth aspect, an apparatus for transmitting pilot symbols is provided, the apparatus comprising at least one module, the at least one module for implementing the method of transmitting pilot symbols provided by the first aspect above.

In a sixth aspect, an apparatus for transmitting pilot symbols is provided, the apparatus comprising at least one module, the at least one module for implementing the method for transmitting pilot symbols provided by the second aspect above.

The technical effects obtained by the second to sixth aspects of the above-described embodiments of the present disclosure are similar to those obtained by the corresponding technical means in the first aspect and the second aspect, and are not described herein again.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure are:

In the embodiment of the present disclosure, the transmitting end determines, according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block, the multiple interference resource blocks corresponding to the target resource block to the target resource. The signal interference value of the block; the transmitting end determines the pilot symbol to be transmitted of the target resource block according to the initial pilot symbol and the signal interference value of the target resource block; the transmitting end sends the target resource block to the receiving end through the target resource block. The pilot symbol sent. In this way, the transmitting end can add an offset for canceling the signal interference in the pilot symbol before transmitting the pilot symbol, and the purpose of eliminating the signal interference can be achieved without using other resource blocks. Therefore, the pilot symbol is transmitted. There are fewer time-frequency resources in the process.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. For ordinary users in the art, other drawings can be obtained from these drawings without any creative work.

FIG. 1 is a schematic structural diagram of a transmitting end according to an embodiment of the present disclosure;

FIG. 2 is a flowchart of a method for transmitting a pilot symbol according to an embodiment of the present disclosure;

3 is a schematic diagram of a working principle of a transmitting end according to an embodiment of the present disclosure;

4 is a schematic diagram of a working principle of a receiving end according to an embodiment of the present disclosure;

FIG. 5 is a time-frequency location diagram of a target resource block and an interference resource block according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a transmitting end according to an embodiment of the present disclosure;

FIG. 7 is a flowchart of a method for transmitting a pilot symbol according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an apparatus for transmitting a pilot symbol according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an apparatus for transmitting a pilot symbol according to an embodiment of the present disclosure.

detailed description

The embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

As used herein, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, which may be hardware, firmware, a combination of hardware and software, software, or in operation. software. For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread in execution, a program, and/or a computer. As an example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution, and a component can be located in a computer and/or distributed between two or more computers. Moreover, these components can execute from various computer readable media having various data structures thereon. These components may be passed, for example, by having one or more data packets (eg, data from one component that interacts with the local system, another component of the distributed system, and/or signaled through, such as the Internet) The network interacts with other systems to communicate in a local and/or remote process.

Furthermore, the present application describes various aspects in connection with a wireless network device (which may be referred to as a receiving end and/or a transmitting end), which may be a base station that can be used with one or more user equipments. The communication may also be used for communication with one or more base stations having partial user equipment functions (such as communication between a macro base station and a micro base station, such as an access point); the wireless network device may also be a user equipment, user The device can be used for communication with one or more user devices (such as D2D communication), and can also be used to communicate with one or more base stations. User equipment may also be referred to as user terminals and may include systems, subscriber units, subscriber stations, mobile stations, mobile wireless terminals, mobile devices, nodes, devices, remote stations, remote terminals, terminals, wireless communication devices, wireless communication devices, or Some or all of the features of the user agent. User equipment can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, smart phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), laptop computers, handheld communication devices, handheld computing Devices, satellite wireless devices, wireless modem cards, and/or other processing devices for communicating over wireless systems. A base station may also be referred to as an access point, a node, a Node B, an evolved Node B (eNB), or some other network entity, and may include some or all of the functions of the above network entities. The base station can communicate with the wireless terminal over the air interface. This communication can be done by one or more sectors. The base station can act as a router between the wireless terminal and the rest of the access network by converting the received air interface frame to an IP packet, wherein the access network includes an Internet Protocol (IP) network. The base station can also coordinate the management of air interface attributes and can also be a gateway between the wired network and the wireless network. As shown in FIG. 1, the wireless network device can include a processor 110 and a transceiver 120, which can be coupled to the processor 110, respectively. The transceiver 120 can be divided into a receiver and a transmitter, and the hardware components included in each of them can be shared according to actual needs. The receiver can be used to receive signals, and the receiver can include, but is not limited to, an antenna, one or more oscillators, a coupler, an LNA (low noise amplifier), a duplexer, an analog to digital converter, a frequency converter, etc. One or more of the hardware. The transmitter can be used to transmit signals, and the transmitter can include, but is not limited to, an antenna, one or more oscillators, a coupler, a power amplifier (PA), a duplexer, a digital to analog converter, a frequency converter, etc. One or more. In the present application, the transceiver 120 can be used to receive or send related processing of a message, the processor 110 can include one or more processing units; the processor can be a general purpose processor, including a central processing unit (CPU) ), Network Processor (NP), etc.; can also be digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices. In particular, the program can include program code, the program code including computer operating instructions.

The present application will present various aspects and systems around a system that can include multiple devices, components, modules, and the like. Example or feature. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules, etc. discussed in connection with the figures. In addition, a combination of these schemes can also be used.

In addition, in the embodiments of the present application, the word "exemplary" is used to mean an example, an illustration, or a description. Any embodiment or design described as "example" in this application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the term use examples is intended to present concepts in a concrete manner.

In the embodiment of the present application, information, message, should indicate that the meaning to be expressed is consistent when the difference is not emphasized. "of", "corresponding (relevant)" and "corresponding" can sometimes be mixed. It should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.

The network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

The processing flow shown in FIG. 2 will be described in detail below with reference to specific implementations, and the content can be as follows:

Step 201: The transmitting end determines, according to the data symbols and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block, the signals of the multiple resource blocks corresponding to the target resource block to the target resource block. Interference value.

In the implementation, in the process of transmitting data by using the filter bank multi-carrier technology, as shown in FIG. 3, the transmitting end may first convert the data symbol stream to be transmitted into a stream of N data symbols by serial-to-sequence conversion, and then n data symbol streams using filters

Modulating data symbols, wherein

П _KT (t) represents a square wave function with a symbol period of KT, namely:

K is the overlap factor, which represents the number of symbol periods that the impulse response of the prototype filter continues, and the selection of the weighting coefficient H _k is shown in Table 1.

Table 1, weighting coefficients of the prototype filter of FBMC

T represents the symbol period. In this way, the signal sent by the final sender can be expressed as:

Where x _n,m is the mth data symbol of the nth data stream (each data stream can correspond to one subcarrier), m=0,1,...,n=0,1,...,N-1, N is the number of subcarriers,

The schematic diagram of the structure of the receiving end can be as shown in FIG. 4. In the additive white Gaussian noise channel, the signal received by the receiving end can be expressed as:

y(t)=x(t)+n(t),

Where n(t) is a Gaussian white noise with a unilateral power spectrum of N ₀ . For the data symbol x _k,l , the receiving end can filter y(t) using the matched filter f _k (t)=g _k (KT-t) and f _k at the time KT+lT/2 ( The output of t) is sampled so that the sample r _k,l can be obtained:

As an estimate of x _k,l , where

Convolution operation for both,

For the conjugate function of f _k (t), A _g (n, m) is the second formula of the original function of g ₀ (t), which can reflect the correlation between the function after shifting in the time-frequency domain and the original function. Therefore, it can be used to determine the signal interference value between resource blocks, n _{k, l} is the filtered noise:

The value of A _g (n, m) shown in Table _{2, A g (n, m} ) values are listed in the table but not both may be approximately zero.

Table 2, the value of g ₀ (t)

n\m	-4	-3	-2	-1	0	1	2	3	4
-1	0.005	0.043i	-0.125	-0.206i	0.239	0.206i	-0.125	-0.043i	0.005
0	0	-0.067	0	0.564	1	0.564	0	-0.067	0
1	0.005	-0.043i	-0.125	0.206i	0.239	-0.206i	-0.125	0.043i	0.005

Before the transmitting end sends the pilot symbol in the target resource block, the plurality of interference resource blocks corresponding to the target resource block may be determined according to the value of the above g ₀ (t). Specifically, the target resource block is in the time-frequency grid. The coordinates are (0, 0), and the coordinates of the corresponding multiple interference resource blocks may be (n, m), n = ±1, ±2, ..., m = ±1, ±2. Then, the transmitting end can acquire the data symbol x _n,m and the carrier function to be transmitted in the interference resource block _, and the carrier function in the target resource block, so that the carrier function and the target of the interference resource block can be determined by solving the second formula. The correlation of the carrier function of the resource block A _g (kn, lm), so that the signal interference value of the plurality of interference resource blocks corresponding to the target resource block to the target resource block can be determined:

Where (k, l) is the location where the target resource block is located, that is, on the kth subcarrier of the lth symbol, and

Representing a set of interference resource blocks, for example, as shown in FIG. 5, if only the interference caused by a resource block around the target resource block is considered, it is possible to:

Specifically, by choosing a different one

, a compromise between system performance and computational complexity can be considered. It is worth mentioning that the signal interference value determined here is only a rough estimate and is not an accurate signal interference value.

This step can be specifically implemented by the processor 110.

Step 202: The transmitting end determines, according to an initial pilot symbol and a signal interference value of the target resource block, a pilot symbol to be transmitted of the target resource block.

In an implementation, after determining, by the transmitting end, the signal interference value of the multiple resource blocks corresponding to the target resource block to the target resource block, the initial pilot symbol corresponding to the target resource block may be acquired first, and then the initial interference symbol is used according to the signal interference value. The pilot symbols are offset adjusted so that the pilot symbols to be transmitted of the target resource block can be determined. It should be noted that the initial pilot symbols may be considered as a sequence, that is, the initial pilot symbols transmitted in different resource blocks may be different, and the initial pilot signals may be pre-stored in the transmitting end and the receiving end. It can also be negotiated and temporarily generated by the sender and the receiver.

This step may be specifically implemented by the processor 110 and the memory 120 in common.

Optionally, the offset adjustment is specifically to remove the signal interference value in the initial pilot symbol. Correspondingly, the processing in step 202 may be as follows: the transmitting end subtracts the signal interference value from the initial pilot symbol of the target resource block, to obtain The pilot symbol of the target resource block to be transmitted.

In the implementation, the transmitting end determines the signal interference value of the plurality of interference resource blocks corresponding to the target resource block to the target resource block.

After that, the initial pilot symbol P corresponding to the target resource block may be obtained, so that the pilot symbol to be sent of the target resource block may be determined.

This step can be specifically implemented by the processor 110.

Step 203: The transmitting end sends, by using the target resource block, the pilot symbol to be sent of the target resource block to the receiving end.

In an implementation, after determining the pilot symbol to be transmitted of the target resource block, the transmitting end may modulate the pilot symbol to be transmitted by using the carrier function of the target resource block, and then send the pilot to the receiving end in the target resource block. symbol.

This step can be specifically implemented by the transceiver 120.

Optionally, after the step 203, the receiving end may receive the pilot symbol, and estimate the channel fading value according to the pilot symbol, and perform the equalization compensation process based on the channel fading value. For the corresponding process, refer to step 204 to step 206:

Step 204: The receiving end receives the pilot symbol sent by the transmitting end through the target resource block.

In an implementation, after the transmitting end sends the pilot symbol to the receiving end through the target resource block, the receiving end may receive the pilot symbol affected by channel fading, signal interference, noise interference, and the like.

Step 205: The receiving end determines a channel fading value of the target resource block according to the received pilot symbol and the initial pilot symbol of the target resource block.

In an implementation, after receiving the pilot symbol sent by the transmitting end through the target resource block, the receiving end may determine the channel fading value of the target resource block according to the initial pilot symbol of the target resource block and the received pilot symbol. Specifically, the initial pilot symbol of the target resource block is P, and the received pilot symbol is

among them,

It represents the superposition of residual signal interference value and noise after cancellation, and h _k is the channel fading value. In turn, the receiving end can determine the channel fading value of the target resource block.

Step 206: The receiving end performs equalization compensation processing according to the channel fading value of the target resource block.

In the implementation, after the receiving end determines the channel fading value of the target resource block, the received signal may be subjected to equalization compensation processing according to the channel fading value, that is, the interference between the resource blocks and the phase orthogonality of the data symbols are restored.

Optionally, the receiving end may determine a channel fading value of the other resource block according to the channel fading value of the target resource block. Correspondingly, the processing of step 206 may be as follows: the receiving end is based on the information of the multiple target resource blocks. The channel fading value determines a channel fading value of other resource blocks between the plurality of target resource blocks; the receiving end performs equalization compensation processing on the target resource block and other resource blocks according to the channel fading values of the target resource block and other resource blocks.

In an implementation, after receiving the channel fading values of the plurality of target resource blocks, the receiving end may calculate, by using an interpolation algorithm, other resource blocks other than the target resource blocks according to channel fading values of the plurality of target resource blocks, where The specific interpolation algorithm is not limited. After determining the channel fading values of the target resource block and other resource blocks, the equalization compensation process may be performed according to the channel fading value.

Optionally, the receiving end may send the determined channel fading value of the target resource block to the sending end. Correspondingly, after step 206, the receiving end may send the channel fading value of the target resource block to the sending end.

Optionally, the sending end may estimate the signal interference value corresponding to the subsequent resource block according to the channel fading value of the received target resource block, and the corresponding processing may be as follows: the sending end receives the multiple target resource blocks sent by the receiving end. a channel fading value; the transmitting end determines a channel fading value of the plurality of interfering resource blocks corresponding to the first target resource block of the to-be-transmitted pilot symbol according to the channel fading value of the plurality of target resource blocks; and the transmitting end corresponds to the first target resource block according to the first target resource block Determining the first target resource block corresponding to the data symbol and the carrier function in the plurality of interference resource blocks, the carrier function in the first target resource block, and the channel fading value corresponding to the plurality of interference resource blocks corresponding to the first target resource block a signal interference value of the plurality of interference resource blocks to the first target resource block; the transmitting end according to the initial pilot symbol of the first target resource block, and the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block a signal interference value, determining a pilot symbol to be transmitted of the first target resource block; the transmitting end is connected by the first target resource block Transmitting a first leading end to be sent to the target pilot symbol resource block.

In an implementation, after receiving the channel fading value of the multiple target resource blocks sent by the receiving end, the transmitting end may first determine the first target resource block used for transmitting the pilot symbol and the corresponding multiple interference resource blocks. Then, based on the received channel fading values of the plurality of target resource blocks, the channel fading value of the plurality of interfering resource blocks corresponding to the first target resource block is calculated by using an interpolation algorithm, so that the transmitting end may be corresponding to the multiple corresponding to the first target resource block. a data symbol x _n,m in the interference resource block and a carrier function, a carrier function in the first target resource block, and a channel fading value corresponding to the plurality of interference resource blocks corresponding to the first target resource block

Determining a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block

specific,

Afterwards, the transmitting end may perform signal interference value to the first target resource block according to the initial pilot symbol P of the first target resource block and the multiple interference resource blocks corresponding to the first target resource block.

Determining a pilot symbol to be transmitted of the first target resource block

Where l=0,1,...m,k=1,2,...,n. Further, the transmitting end may send, by using the first target resource block, the pilot symbol to be transmitted of the first target resource block to the receiving end.

This step may be specifically implemented by the processor 110 and the transceiver 120.

In the embodiment of the present disclosure, the transmitting end determines, according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block, the multiple interference resource blocks corresponding to the target resource block to the target resource. The signal interference value of the block; the transmitting end determines the pilot symbol to be transmitted of the target resource block according to the initial pilot symbol and the signal interference value of the target resource block; the transmitting end sends the target resource block to the receiving end through the target resource block. The pilot symbol sent. In this way, the transmitting end can add an offset for canceling the signal interference in the pilot symbol before transmitting the pilot symbol, and the purpose of eliminating the signal interference can be achieved without using other resource blocks. Therefore, the pilot symbol is transmitted. There are fewer time-frequency resources in the process.

The present disclosure further provides a method for transmitting a pilot symbol, where the execution body of the method is a transmitting end having a function of transmitting a pilot symbol, wherein the transmitting end may be a base station, a mobile phone, etc., and the transmitting end may include a processor 610 and The transceiver 620, the processor 610 can be connected to the transceiver 620, as shown in FIG. The processor 610 may be a control center of the transmitting end, and connect various parts of the transmitting end by using various interfaces and lines, and execute various functions and processing data of the transmitting end by running or executing an instruction or a program received by the transceiver 620, thereby performing the transmitting end. Overall monitoring. The processor 610 may include one or more processing units; the processor 610 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; Signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device. Transceiver 620 can be used to receive and transmit signals.

The processing flow shown in FIG. 7 will be described in detail below with reference to specific implementations, and the content can be as follows:

Step 701: The transmitting end acquires a preset second carrier function, and determines a first carrier function that is orthogonal to the second carrier function at the preset time-frequency position.

In implementation, considering that in the process of transmitting data using the filter bank multi-carrier technique, mutual interference between pilot symbols and data symbols is due to the carrier function of the pilot symbols and data symbols in the filter bank multi-carrier system. The correlation between the two characteristics, so that in order to avoid interference of the data symbols with the pilot symbols, two carrier functions orthogonal to each other at the preset time-frequency position can be designed, and the pilots are respectively used by the two carrier functions. The symbol and the data symbol are modulated. Here, the transmitting end may first determine a target resource block for transmitting the pilot symbol, and then determine an interference resource block corresponding to the target resource block, where the preset time-frequency position is an interference resource block corresponding to Time-frequency position. Therefore, when transmitting the data symbol, the transmitting end may select a carrier function (ie, a second carrier function) used by the conventional filter bank multi-carrier system as a carrier function, and when transmitting the pilot symbol, the transmitting end may acquire the preset first. The second carrier function can then determine a first carrier function that is orthogonal to the second carrier function at the predetermined time-frequency location as a carrier function.

This step can be specifically implemented by the processor 610.

Optionally, the spectral main lobe widths of the multiple sub-functions of the first carrier function are all less than a preset threshold.

The preset threshold may be a bandwidth value of the subcarrier, the spectral main lobe width of the function is narrow, the side lobe fading is faster, and the interference to other functions is small.

In an implementation, the transmitting end may select the first carrier function as

among them,

For the sub-function, D _k (k=0,1,...,L-1) is the weighting coefficient corresponding to the sub-function, which belongs to the unknown quantity.

Optionally, the manner of determining the first carrier function may be as follows: the sending end acquires a preset second carrier function, and calculates the value of the first formula of the first carrier function and the second carrier function on the target resource block. Zero, the weighting coefficient corresponding to each sub-function of the required first carrier function; determining the first carrier function according to the weighting coefficient corresponding to each sub-function.

Wherein, the first formula of the first carrier function and the second carrier function may be used to reflect the correlation between the second carrier function and the first carrier function after shifting in the time-frequency domain.

In the implementation, when the transmitting end sends the data symbol, the carrier function (ie, the second carrier function) used by the traditional filter bank multi-carrier system may be selected as the carrier function, and when the pilot symbol is transmitted, the transmitting end may acquire the first. The preset second carrier function g ₀ (t) determines the first formula of the first carrier function p ₀ (t) and the second carrier function g ₀ (t):

Then, the first formula is zero at the preset time-frequency position (ie, the interference resource block), that is,

Represents a set of subscripts that interfere with a resource block, P ₀ (t) and

The corresponding carrier function is orthogonal, and the solution equation can be obtained:

Furthermore, the transmitting end can solve the second carrier function according to the above formula. Specifically, substituting p ₀ (t) into the above solving equation may include:

Where a _n,m,l are the determined known quantities:

Then the solution equation becomes:

Finally, an algorithm for solving a system of equations can be used to determine a first carrier function that meets the requirements according to the above solution equation.

This step can be specifically implemented by the processor 610.

Optionally, the transmitting end may simplify the solution process by adding a qualification condition to p ₀ (t). Correspondingly, the first carrier function is an even function sum or a real function.

In the implementation, firstly, it can be defined that p ₀ (t) is an even function, that is, there is p ₀ (t)=p ₀ (-t), and according to the definition of A _gp (n, m), A _gp can be obtained ( n,m)=A _gp (-n,-m), and if the limit p ₀ (t) is a real function, then there is

among them,

Is the conjugate value of A _gp . Based on the above processing, it can be used

It indicates that the set of interfering resource blocks is added to p ₀ (t), so the following equation can be obtained:

Step 702: The transmitting end modulates the pilot symbol by using the first carrier function, sends the modulated pilot symbol to the receiving end, and modulates the data symbol by using the second carrier function, and sends the tone to the receiving end. The data symbol after the system.

In an implementation, after determining the mutually orthogonal first carrier function and the second carrier function, the transmitting end may modulate the pilot symbols by using the first carrier function, and modulate the data symbols by using the second carrier function, thereby The modulated pilot symbols and data symbols are transmitted to the receiving end.

This step may be specifically implemented by the processor 610 and the transceiver 620.

Optionally, after the step 702, the receiving end may receive the pilot symbol, and estimate the channel fading value according to the pilot symbol, and perform the equalization compensation process based on the channel fading value. For the corresponding process, refer to step 703 to step 705:

Step 703: The receiving end receives the pilot symbol sent by the transmitting end through the target resource block.

Step 704: The receiving end determines, according to the received pilot symbol and the initial pilot symbol, a channel fading value of the resource block corresponding to the pilot symbol.

Step 705: The receiving end performs equalization compensation processing according to a channel fading value of the target resource block.

In the embodiment of the present disclosure, the transmitting end acquires a preset second carrier function, and determines a first carrier function that is orthogonal to the second carrier function at the preset time-frequency position; and the transmitting end performs the pilot symbol by using the first carrier function. Modulation, transmitting the modulated pilot symbols to the receiving end, and modulating the data symbols by the second carrier function, and transmitting the modulated data symbols to the receiving end. In this way, the transmitting end separately uses two carrier functions orthogonal to each other to transmit pilot symbols and data symbols, which can effectively avoid signal interference of the data symbols on the pilot symbols during signal transmission, and does not need to consume other resource blocks, thus, The process of transmitting pilot symbols consumes less time-frequency resources.

FIG. 8 is a block diagram of an apparatus for transmitting pilot symbols according to an embodiment of the present disclosure. The means for transmitting the pilot symbols can be implemented as part or all of the device by software, hardware or a combination of both. The apparatus for transmitting a pilot symbol provided by the embodiment of the present disclosure may implement the process described in FIG. 2 of the embodiment of the present disclosure, where the apparatus for transmitting a pilot symbol includes: a first determining module 810, a second determining module 820, and a sending module 830. The receiving module 840 and the third determining module 850, wherein:

a first determining module 810, configured to determine, according to a data symbol and a carrier function in the multiple interference resource blocks corresponding to the target resource block, and a carrier function in the target resource block, multiple interference resources corresponding to the target resource block The signal interference value of the block to the target resource block may specifically implement the determining function in the foregoing step 201, and other implicit steps of determining the signal interference value by the transmitting end.

a second determining module 820, configured to: according to the initial pilot symbol of the target resource block and the signal The interference value, the pilot symbol to be transmitted of the target resource block is determined, and the determining function in the foregoing step 202 and the other implicit steps of determining the pilot symbol by the transmitting end may be specifically implemented.

The sending module 830 is configured to send, by using the target resource block, a pilot symbol to be sent in the target resource block to the receiving end, where the sending function in the foregoing step 203 can be implemented, and the pilot symbol is sent by the sending end. Other implied steps.

Optionally, the second determining module 820 is configured to:

And subtracting the signal interference value from an initial pilot symbol of the target resource block to obtain a pilot symbol to be transmitted of the target resource block.

Optionally, the device further includes:

The receiving module 840 is configured to receive a channel fading value of the multiple resource blocks sent by the receiving end and other resource blocks between the multiple target resource blocks;

a third determining module 850, configured to determine a channel fading value of the multiple interference resource blocks corresponding to the first target resource block of the to-be-transmitted pilot symbol according to the channel fading value of the multiple target resource blocks;

The first determining module 810 is further configured to: according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the first target resource block, the carrier function in the first target resource block, and the a channel fading value corresponding to the plurality of interference resource blocks corresponding to the target resource block, and determining a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block;

The second determining module 820 is further configured to: according to the initial pilot symbol of the first target resource block, and the signal of the first target resource block by using multiple interference resource blocks corresponding to the first target resource block And determining, by the interference value, a pilot symbol to be sent of the first target resource block;

The sending module 830 is further configured to send, by using the first target resource block, a pilot symbol to be sent of the first target resource block to the receiving end.

Related details can be combined with the method embodiments described in FIG.

It should be noted that the foregoing first determining module 810, the second determining module 820, and the third determining module 850 may be implemented by the processor 110, and the sending module 830 and the receiving module 840 may be implemented by the transceiver 120, or combined with the processor. 110 to achieve.

In the embodiment of the present disclosure, the transmitting end determines, according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block, the multiple interference resource blocks corresponding to the target resource block to the target resource. The signal interference value of the block; the transmitting end determines the pilot symbol to be transmitted of the target resource block according to the initial pilot symbol and the signal interference value of the target resource block; the transmitting end passes the target resource Block, the pilot symbol to be transmitted of the target resource block is sent to the receiving end. In this way, the transmitting end can add an offset for canceling the signal interference in the pilot symbol before transmitting the pilot symbol, and the purpose of eliminating the signal interference can be achieved without using other resource blocks. Therefore, the pilot symbol is transmitted. There are fewer time-frequency resources in the process.

FIG. 9 is a block diagram of an apparatus for transmitting pilot symbols according to an embodiment of the present disclosure. The means for transmitting the pilot symbols can be implemented as part or all of the device by software, hardware or a combination of both. The apparatus for transmitting a pilot symbol provided by the embodiment of the present disclosure may implement the process described in FIG. 7 of the embodiment of the present disclosure. The apparatus for transmitting a pilot symbol includes: a determining module 910, and a sending module 920, where:

The determining module 910 is configured to obtain a preset second carrier function, and determine a first carrier function that is orthogonal to the second carrier function at a preset time-frequency position, where the determining function in the foregoing step 701 is specifically implemented, and Other implicit steps of the first carrier function are determined by the transmitting end.

The sending module 920 is configured to: modulate the pilot symbol by using the first carrier function, send the modulated pilot symbol to the receiving end, and modulate the data symbol by using the second carrier function, to the receiving end Transmitting the modulated data symbols may specifically implement the sending function in the above step 702, and other implicit steps of transmitting the pilot symbols by the transmitting end.

Optionally, the spectral main lobe widths of the multiple sub-functions of the first carrier function are all less than a preset threshold.

Optionally, the determining module 910 is configured to:

The sending end acquires a preset second carrier function, and calculates that the first carrier function and the first formula of the second carrier function have a value of zero at a preset time-frequency position, and the required first carrier a weighting coefficient corresponding to each subfunction of the function;

The first carrier function is determined according to a weighting coefficient corresponding to each of the sub-functions.

Optionally, the first carrier function is an even function and/or a real function.

Related details can be combined with the method embodiments described in FIG.

It should be noted that the foregoing determining module 910 may be implemented by the processor 610, and the sending module 920 may be implemented by the transceiver 620 or implemented in conjunction with the processor 610.

In the embodiment of the present disclosure, the transmitting end acquires a preset second carrier function, and determines a first carrier function that is orthogonal to the second carrier function at the preset time-frequency position; and the transmitting end performs the pilot symbol by using the first carrier function. Modulation, transmitting the modulated pilot symbols to the receiving end, and modulating the data symbols by the second carrier function, and transmitting the modulated data symbols to the receiving end. In this way, the transmitting ends are orthogonal to each other. The two carrier functions transmit pilot symbols and data symbols, which can effectively avoid signal interference of the data symbols on the pilot symbols during signal transmission, and does not need to consume other resource blocks, so that the process of transmitting the pilot symbols is expensive. Less time and frequency resources.

It should be noted that the apparatus for transmitting pilot symbols provided by the foregoing embodiment only uses the division of the foregoing functional modules when transmitting the pilot symbols. In actual applications, the functions may be allocated differently according to requirements. The function module is completed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus for transmitting a pilot symbol provided by the foregoing embodiment is the same as the method for transmitting the pilot symbol. For the specific implementation process, refer to the method embodiment, and details are not described herein again.

A common user in the art can understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium to which it is obtained may be a read only memory, a magnetic disk or an optical disk or the like.

The above description is only the preferred embodiment of the present disclosure, and is not intended to limit the disclosure. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and principles of the present disclosure, should be included in the protection of the present disclosure. Within the scope.

Claims (21)

1. A method for transmitting a pilot symbol, the method comprising:

   Determining, by the transmitting end, the multiple interference resource blocks corresponding to the target resource block to the target resource according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the target resource block, and the carrier function in the target resource block The signal interference value of the block;

   Determining, by the sending end, a pilot symbol to be sent of the target resource block according to an initial pilot symbol of the target resource block and the signal interference value;

   And sending, by the sending end, the pilot symbol to be sent of the target resource block to the receiving end by using the target resource block.
2. The method according to claim 1, wherein the transmitting end determines, according to an initial pilot symbol of the target resource block and the signal interference value, a pilot symbol to be transmitted of the target resource block, including :

   The transmitting end subtracts the signal interference value from the initial pilot symbol of the target resource block to obtain a pilot symbol to be transmitted of the target resource block.
3. The method of claim 1 further comprising:

   Receiving, by the sending end, a channel fading value of the plurality of target resource blocks sent by the receiving end;

   Determining, by the transmitting end, a channel fading value of the multiple interference resource blocks corresponding to the first target resource block of the to-be-transmitted pilot symbol according to the channel fading value of the multiple target resource blocks;

   Transmitting, according to the data symbol and carrier function in the multiple interference resource blocks corresponding to the first target resource block, a carrier function in the first target resource block, and a corresponding one of the first target resource blocks a channel fading value corresponding to the interference resource block, and determining a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block;

   Determining, by the sending end, the signal interference value of the first target resource block according to an initial pilot symbol of the first target resource block and a plurality of interference resource blocks corresponding to the first target resource block a pilot symbol to be transmitted of a target resource block;

   Transmitting, by the sending end, the pilot symbol to be sent of the first target resource block to the receiving end by using the first target resource block.
4. A method for transmitting a pilot symbol, the method comprising:

   The transmitting end acquires a preset second carrier function, and determines a first carrier function orthogonal to the second carrier function at the preset time-frequency position;

   Transmitting, by the first carrier function, a pilot symbol, transmitting a modulated pilot symbol to a receiving end, and modulating the data symbol by using the second carrier function, and transmitting modulation to the receiving end After the data symbol.
5. The method according to claim 4, wherein the spectral main lobe widths of the plurality of sub-functions of the first carrier function are each less than a preset threshold.
6. The method according to claim 5, wherein the transmitting end acquires a preset second carrier function, and determines a first carrier function orthogonal to the second carrier function at a preset time-frequency position, including :

   The sending end acquires a preset second carrier function, and calculates that the first carrier function and the first formula of the second carrier function have a value of zero at a preset time-frequency position, and the required first carrier a weighting coefficient corresponding to each sub-function of the function, wherein the first formula is a preset formula for reacting the correlation between the second carrier function and the first carrier function after shifting in the time-frequency domain;

   The first carrier function is determined according to a weighting coefficient corresponding to each of the sub-functions.
7. The method of claim 4 wherein the first carrier function is an even function and/or a real function.
8. A transmitting end, wherein the transmitting end comprises a processor and a transceiver, wherein:

   The processor is configured to determine, according to a data symbol and a carrier function in the multiple interference resource blocks corresponding to the target resource block, and a carrier function in the target resource block, multiple interference resource blocks corresponding to the target resource block a signal interference value for the target resource block;

   The processor is configured to determine, according to an initial pilot symbol of the target resource block in the memory, and the signal interference value, a pilot symbol to be sent of the target resource block;

   The transceiver is configured to send, by using the target resource block, a pilot symbol to be sent of the target resource block to a receiving end.
9. The transmitting end according to claim 8, wherein the processor is specifically configured to:

   And subtracting the signal interference value from an initial pilot symbol of the target resource block to obtain a pilot symbol to be transmitted of the target resource block.
10. The transmitting end according to claim 8, wherein said transceiver is further used for The transmitting end receives a channel fading value of the plurality of target resource blocks sent by the receiving end;

    The processor is further configured to:

    Determining, according to channel fading values of the plurality of target resource blocks, channel fading values of the plurality of interference resource blocks corresponding to the first target resource block of the to-be-transmitted pilot symbol;

    And a data function and a carrier function in the plurality of interference resource blocks corresponding to the first target resource block, a carrier function in the first target resource block, and multiple interference resource blocks corresponding to the first target resource block Determining, by the corresponding channel fading value, a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block;

    Determining the first target resource block according to an initial pilot symbol of the first target resource block, and a signal interference value of the first target resource block by a plurality of interference resource blocks corresponding to the first target resource block Pilot symbols to be transmitted;

    The transceiver is further configured to send, by using the first target resource block, a pilot symbol to be sent of the first target resource block to the receiving end.
11. A transmitting end, wherein the transmitting end comprises a processor and a transceiver, wherein:

    The processor is configured to acquire a preset second carrier function, and determine a first carrier function that is orthogonal to the second carrier function at a preset time-frequency position;

    The transceiver is configured to modulate a pilot symbol by using the first carrier function, send a modulated pilot symbol to a receiving end, and modulate the data symbol by using the second carrier function, to receive the The terminal transmits the modulated data symbol.
12. The transmitting end according to claim 11, wherein the spectral main lobe widths of the plurality of sub-functions of the first carrier function are all smaller than a preset threshold.
13. The transmitting end according to claim 12, wherein the processor is specifically configured to:

    Obtaining a preset second carrier function, calculating that the first formula of the first carrier function and the second carrier function has a value of zero at a preset time-frequency position, and the required first carrier function is a weighting coefficient corresponding to each sub-function, wherein the first formula is a preset formula for reacting the correlation between the second carrier function and the first carrier function after shifting in the time-frequency domain;

    The first carrier function is determined according to a weighting coefficient corresponding to each of the sub-functions.
14. The transmitting end according to claim 11, wherein said first carrier function is an even function and/or a real function.
15. A device for transmitting pilot symbols, characterized in that the device comprises:

    a first determining module, configured to determine, according to a data symbol and a carrier function in the multiple interference resource blocks corresponding to the target resource block, and a carrier function in the target resource block, multiple interference resource blocks corresponding to the target resource block a signal interference value for the target resource block;

    a second determining module, configured to determine, according to an initial pilot symbol of the target resource block and the signal interference value, a pilot symbol to be sent of the target resource block;

    And a sending module, configured to send, by using the target resource block, a pilot symbol to be sent of the target resource block to the receiving end.
16. The device according to claim 15, wherein the second determining module is configured to:

    And subtracting the signal interference value from an initial pilot symbol of the target resource block to obtain a pilot symbol to be transmitted of the target resource block.
17. The device according to claim 15, wherein the device further comprises:

    a receiving module, configured to receive a channel fading value of the multiple resource blocks sent by the receiving end and other resource blocks between the multiple target resource blocks;

    a third determining module, configured to determine a channel fading value of the multiple interference resource blocks corresponding to the first target resource block of the to-be-transmitted pilot symbol according to the channel fading value of the multiple target resource blocks;

    The first determining module is further configured to: according to the data symbol and the carrier function in the multiple interference resource blocks corresponding to the first target resource block, the carrier function in the first target resource block, and the first a channel fading value corresponding to the plurality of interference resource blocks corresponding to the target resource block, and determining a signal interference value of the plurality of interference resource blocks corresponding to the first target resource block to the first target resource block;

    The second determining module is further configured to: according to an initial pilot symbol of the first target resource block, and a signal interference of the multiple target resource blocks corresponding to the first target resource block to the first target resource block a value, determining a pilot symbol to be transmitted of the first target resource block;

    The sending module is further configured to send, by using the first target resource block, a pilot symbol to be sent of the first target resource block to the receiving end.
18. A device for transmitting pilot symbols, characterized in that the device comprises:

    a determining module, configured to acquire a preset second carrier function, and determine a first carrier function orthogonal to the second carrier function at a preset time-frequency position;

    a sending module, configured to modulate a pilot symbol by using the first carrier function, send a modulated pilot symbol to a receiving end, and modulate the data symbol by using the second carrier function, and send the data symbol to the receiving end The modulated data symbol.
19. The apparatus according to claim 18, wherein the spectral main lobe widths of the plurality of sub-functions of the first carrier function are each less than a preset threshold.
20. The device according to claim 19, wherein the determining module is configured to:

    The sending end acquires a preset second carrier function, and calculates that the first carrier function and the first formula of the second carrier function have a value of zero at a preset time-frequency position, and the required first carrier a weighting coefficient corresponding to each sub-function of the function, wherein the first formula is a preset formula for reacting the correlation between the second carrier function and the first carrier function after shifting in the time-frequency domain;

    The first carrier function is determined according to a weighting coefficient corresponding to each of the sub-functions.
21. The apparatus of claim 20 wherein said first carrier function is an even function and/or a real function.

Images