WO2017059719A1 - 传输数据的方法和设备 - Google Patents

传输数据的方法和设备 Download PDF

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Publication number
WO2017059719A1
WO2017059719A1 PCT/CN2016/090647 CN2016090647W WO2017059719A1 WO 2017059719 A1 WO2017059719 A1 WO 2017059719A1 CN 2016090647 W CN2016090647 W CN 2016090647W WO 2017059719 A1 WO2017059719 A1 WO 2017059719A1
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phase rotation
block
sub
blocks
target
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PCT/CN2016/090647
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English (en)
French (fr)
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吴涛
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2614Peak power aspects
    • H04L27/2615Reduction thereof using coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and an apparatus for transmitting data.
  • Wi-Fi Wireless Fidelity
  • the 802.11 standard after 802.11a, 802.11b, 802.11g, 802.11n and 802.11ac and other versions, the technology is more and more mature, and the system transmission speed is also increasing.
  • 802.11ac is running in the 5GHz band. The maximum can already support 1.3Gbps.
  • 802.11ad is a branch of IEEE 802.11 (or WLAN, WLAN) system. It works in the 60 GHz high frequency band and is mainly used to realize wireless high-definition audio and video signals transmission in the home, bringing more complete HD to home multimedia applications.
  • the video solution also known as WiGig (60GHz Wi-Fi).
  • WiGig 60GHz Wi-Fi
  • 802.11ad technology has high capacity and high rate in multimedia applications (the highest transmission rate can reach 7Gbps when PHY adopts OFDM multi-carrier scheme, and the maximum transmission rate can reach 4.6Gbps when single-carrier modulation scheme is used), Low latency, low power consumption and more.
  • the existing single carrier system performs the following processing on the transmitting end and the receiving end respectively:
  • the information bits to be transmitted are processed as follows: code modulation; the coded data symbols are coded, and the symbol length in each block is N; and the cyclic prefix is added, for example, Guard Interval (GI), The data block after the cyclic prefix is added is sent out.
  • code modulation the coded data symbols are coded, and the symbol length in each block is N
  • cyclic prefix is added, for example, Guard Interval (GI)
  • GI Guard Interval
  • the specific receiving process is as follows: the received data is divided into blocks; the cyclic prefix in each block is deleted; and the FFT is performed on the data group after the cyclic prefix is deleted. Transforming it into the frequency domain; using frequency domain channel information for frequency domain equalization processing on the data transformed into the frequency domain, transforming the frequency domain equalized data back into the time domain by IFFT; demodulating and decoding the time domain signal deal with.
  • the existing single-carrier frequency-domain equalization processing algorithm has the following problems: the frequency-domain channel has the characteristics of selective fading: the channel energy on some sub-carriers is low, and the channel energy on some sub-carriers is high.
  • the frequency domain signal is transformed into the frequency domain, the signal energy on some subcarriers is low, and the signal energy on some subcarriers is high.
  • the received signal is the result of multiplication of the frequency domain channel and the frequency domain signal. Therefore, in some special cases, a low-energy frequency domain signal is transmitted on a sub-carrier with high channel energy, or a high-energy frequency domain signal is transmitted on a sub-carrier with low channel energy. In this case, the frequency domain signal cannot be reliably recovered, which affects the performance of the entire system.
  • the embodiment of the invention provides a method and a device for transmitting data, which can improve the accuracy of data transmission and improve the performance of the system.
  • a first aspect provides a method for data transmission in a wireless local area network, including: dividing a data group in a data block BLK of an initial physical layer protocol data unit PPDU to be used for single carrier transmission into L initial sub-blocks, L is greater than or equal to 2, wherein the BLK includes the data set and the guard interval GI;
  • a target PPDU is generated according to the target BLK, and the target PPDU is transmitted to the receiving device.
  • the data group in the data block BLK of the initial physical layer protocol data unit PPDU to be used for single carrier transmission is divided into L initials.
  • Sub-blocks including:
  • the L initial sub-blocks are obtained by randomly dividing the data group, wherein data symbols included in each initial sub-block are randomly obtained from the data group, and data symbols included in different initial sub-blocks are not repeated.
  • the determining a phase rotation signal of each of the initial sub-blocks of the L initial sub-blocks includes:
  • the multiple sets of phase rotation signals include: e j*(0* ⁇ ) , e j*(0.5* ⁇ ) , e j*( 1* ⁇ ) , e j*(1.5* ⁇ ) and e j*(0.25* ⁇ ) , e j*(0.75* ⁇ ) , e j*(1.25* ⁇ ) , e j*(1.75* ⁇ ) .
  • any one of the first to the third possible implementation manners in a fourth possible implementation manner, the reserved symbol position of the target sub-block of each initial sub-block There is a pilot symbol, wherein a pilot symbol on a reserved symbol of the first target sub-block is used to estimate a phase rotation signal of the first initial sub-block, and pilot symbols of other target sub-blocks are used for estimation Corresponding the phase difference between the phase rotation signal of the initial sub-block and the phase rotation signal of the previous initial sub-block, so that the receiving end estimates the phase rotation signal of each initial sub-block according to the pilot signal of the initial sub-block.
  • any one of the first to the third possible implementation manners in a fifth possible implementation manner, the reserved symbol position of the target sub-block of each initial sub-block There is a pilot symbol for the receiving end to determine the phase rotation signal of each of the initial sub-blocks.
  • any one of the first to the third possible implementation manners in the sixth possible implementation manner, the reservation of the first target sub-block in all target sub-blocks Transmitting, at a symbol position, a first pilot symbol, where the first pilot symbol is used to estimate a phase rotation signal of the first initial sub-block, and other target sub-blocks of all target sub-blocks except the first target sub-block of A known transform form of the first pilot symbol is transmitted at a reserved symbol position, the known transform form being used by the receiving end to estimate a phase rotation signal of the other initial sub-blocks according to the transformed form.
  • the transmission data in one of the target sub-blocks The indication information of the phase rotation signals of all the initial sub-blocks is transmitted, and the indication information is used by the receiving end to determine the phase rotation signals of all the initial sub-blocks.
  • the data in the target BLK is a real signal or an imaginary signal
  • the multiple sets of phase rotation signals include: a real phase rotation signal group and The imaginary phase rotation signal group, when the data in the target BLK is a real number signal, the candidate phase rotation signal group is the real phase rotation signal group, and when the data in the target BLK is an imaginary signal, the candidate phase rotation signal group Rotate the signal group for the imaginary phase.
  • the determining a phase rotation signal of each of the L initial sub-blocks includes:
  • phase rotation signals of all the initial sub-blocks are preset fixed values.
  • the determining a phase rotation signal of each of the L initial sub-blocks includes:
  • phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 –j] ⁇ .
  • a method for transmitting data for a wireless local area network including:
  • the data group in the target data block BLK of the target PPDU includes L target sub-blocks, L is greater than or equal to 2;
  • each of the target sub-blocks is a product of a phase rotation signal of the initial sub-block and the initial sub-block;
  • the data symbols in each target sub-block of the target BLK of the target PPDU after the frequency domain equalization are multiplied by the conjugate signal of the corresponding initial sub-block phase rotation signal to obtain a time domain signal of the target BLK.
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • phase rotation signal of the sub-block Estimating the phase rotation signals of all the initial sub-blocks according to the pilot signals of all the target sub-blocks, wherein the phase rotation signal of the first initial sub-block is estimated according to the pilot symbols of the first target sub-block; according to other target sub-
  • the pilot symbol of the block estimates a difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block, and determines other initials according to the difference and the phase rotation signal of the first initial sub-block The phase rotation signal of the sub-block.
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • the phase rotation signals of all the initial sub-blocks are determined according to the indication information of the phase rotation signals of all the initial sub-blocks transmitted in one of the target sub-blocks.
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • the determining a phase rotation signal of the initial sub-block corresponding to each of the target sub-blocks of the L target sub-blocks includes:
  • the preset fixed value is determined as the phase rotation signal of the initial sub-block.
  • the determining a phase rotation signal of the initial sub-block corresponding to any one of the L target sub-blocks includes:
  • phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j] , [1 – j] ⁇ .
  • an apparatus for transmitting data for a wireless local area network including:
  • a dividing unit configured to divide the data group in the data block BLK of the initial physical layer protocol data unit PPDU to be used for single carrier transmission into L initial sub-blocks, L is greater than or equal to 2, wherein the BLK includes the data group and protection Interval GI;
  • a determining unit configured to determine a phase rotation signal of each of the L initial sub-blocks
  • An obtaining unit configured to multiply data symbols of each initial sub-block by a phase rotation signal of each of the initial sub-blocks to obtain a target sub-block of each of the initial sub-blocks
  • a combining unit configured to combine the target sub-blocks of the L initial sub-blocks and the GI to obtain a target BLK, wherein a peak-to-average ratio of the frequency domain data after the target BLK is transformed into the frequency domain is smaller than the BLK transform to the frequency domain Peak-to-average ratio of frequency domain data;
  • a sending unit configured to generate a target PPDU according to the target BLK, and send the target PPDU to the receiving end device.
  • the dividing unit sequentially divides the data group to obtain the L initial sub-blocks
  • the L initial sub-blocks are obtained by randomly dividing the data group, wherein data symbols included in each initial sub-block are randomly obtained from the data group, and data symbols included in different initial sub-blocks are not repeated.
  • the determining unit determines, from the plurality of sets of phase rotation signals, a candidate phase rotation signal group, and the candidate phase rotation signal Selecting, in the group, a phase rotation signal of each of the L initial sub-blocks, such that the data of the L initial sub-blocks respectively multiplied by the corresponding phase rotation signal is transformed to the peak of the frequency domain data after the frequency domain
  • the ratio is the smallest.
  • the multiple sets of phase rotation signals include: e j*(0* ⁇ ) , e j*(0.5* ⁇ ) , e j*(1* ⁇ ) , e j*(1.5* ⁇ ) and e j*(0.25* ⁇ ) , e j*(0.75* ⁇ ) , e j*(1.25* ⁇ ) , e j*(1.75 * ⁇ ) .
  • the target sub-block of each initial sub-block The reserved symbol position has a pilot symbol, wherein the pilot symbol on the reserved symbol of the first target sub-block is used to estimate the phase rotation signal of the first initial sub-block, and the pilot of the other target sub-block The symbol is used to estimate a phase difference value between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block, so that the receiving end estimates the phase rotation signal of each initial sub-block according to the pilot signal of the initial sub-block.
  • the target sub-block of each initial sub-block The reserved symbol position has a pilot symbol for the receiving end to determine the phase rotation signal of each of the initial sub-blocks.
  • the first target sub-block of all the target sub-blocks Transmitting, at a reserved symbol position of the block, a first pilot symbol, where the first pilot symbol is used to estimate a phase rotation signal of the first initial sub-block, except for the first target sub-block in all target sub-blocks
  • the known transform form of the first pilot symbol is transmitted at the reserved symbol position of the other target sub-block, and the known transform form is used by the receiving end to estimate the phase rotation signal of the other initial sub-block according to the transform form.
  • any one of the first to third possible implementation manners of the third aspect in the seventh possible implementation, one of the target sub-blocks
  • the indication information of the phase rotation signals of all the initial sub-blocks is transmitted in the transmission data, and the indication information is used by the receiving end to determine the phase rotation signals of all the initial sub-blocks.
  • the data in the target BLK is a real signal or an imaginary signal.
  • the plurality of sets of phase rotation signals include: a real phase rotation signal group and an imaginary phase rotation signal group.
  • the candidate phase rotation signal group is the real phase rotation signal group
  • the candidate phase rotation signal group is the imaginary phase rotation signal group.
  • the determining unit determines that the phase rotation signals of all the initial sub-blocks are preset fixed values.
  • the determining unit determines that the phase rotation signals of all the initial sub-blocks are in order from the preset set according to a preset rule. Choose to get.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j ], [1 – j] ⁇ .
  • an apparatus for transmitting data for a wireless local area network including:
  • a receiving unit configured to receive a target PPDU, the data group in the target data block BLK of the target PPDU includes L target sub-blocks, L is greater than or equal to 2;
  • a determining unit configured to determine a phase rotation signal of an initial sub-block corresponding to each of the L target sub-blocks, wherein each of the target sub-blocks is a phase rotation of the initial sub-block and the initial sub-block Product of the signal;
  • An obtaining unit configured to multiply a data symbol in each target sub-block of the target BLK of the target PPDU after frequency domain equalization and a conjugate signal of the corresponding initial sub-block phase rotation signal to obtain a time domain of the target BLK signal.
  • the determining unit estimates a phase rotation signal of all the initial sub-blocks according to the pilot signals of all the target sub-blocks, wherein the pilot according to the first target sub-block The symbol estimates a phase rotation signal of the first initial sub-block; and estimates a difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block according to the pilot symbols of the other target sub-blocks, according to the difference
  • the value and the phase rotation signal of the first initial sub-block determine the phase rotation signal of the other initial sub-blocks.
  • the determining unit estimates a phase rotation signal of the initial sub-block corresponding to each target sub-block according to the pilot symbols of each target sub-block.
  • the determining unit estimates phase rotation signals of all initial sub-blocks according to pilot signals of all target sub-blocks, wherein the first one of all target sub-blocks is used. a first pilot symbol of the target sub-block, estimating a phase rotation signal of the first initial sub-block in all the initial sub-blocks; estimating a phase rotation signal of the corresponding initial sub-block according to pilot symbols of the other target sub-blocks A transform form of the phase rotation signal of an initial sub-block, and determining a phase rotation signal of the other initial sub-blocks according to the transform form and the phase rotation signal of the first initial sub-block.
  • the determining unit determines, according to the indication information of the phase rotation signals of all the initial sub-blocks transmitted in one of the target sub-blocks, all the initial sub-blocks. Phase rotation signal.
  • the determining unit determines a phase rotation signal of the initial sub-block according to a type of data in the BLK in the target PPDU, where, when the target PPDU is a BLK When the data in the real number is a real number signal, determining that the phase rotation signal of the initial sub-block is one of the real-numbered phase selection signal groups, and determining the phase rotation signal of the initial sub-block when the data in the BLK in the target PPDU is an imaginary number signal Select one of the signal groups for the imaginary phase.
  • the determining unit determines the preset fixed value as the phase rotation signal of the initial sub-block.
  • the determining unit sequentially selects phase rotation signals of all initial sub-blocks from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • the embodiment of the present invention divides a data group into a plurality of initial sub-blocks, determines a phase rotation signal of each initial sub-block, and sends a data symbol of each initial sub-block to each of the receiving end devices.
  • the target sub-block obtained by multiplying the phase rotation signals of the initial sub-blocks.
  • the peak-to-average ratio of the frequency domain data of the data block is reduced, so that the receiving end can reliably recover the frequency domain signal, improving the accuracy of data transmission and the performance of the system.
  • FIG. 1 is a schematic diagram of a scenario for transmitting data applicable to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a PPDU in the existing 802.11ad.
  • FIG. 4 is a schematic structural diagram of a data block BLK in the existing 802.11ad.
  • FIG. 5 is a schematic structural diagram of a data group according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a data group according to another embodiment of the present invention.
  • FIG. 13 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.
  • Figure 14 is a schematic block diagram of an apparatus for data transmission in accordance with one embodiment of the present invention.
  • 15 is a schematic block diagram of an apparatus for data transmission in accordance with another embodiment of the present invention.
  • 16 is a schematic block diagram of an apparatus for data transmission in accordance with another embodiment of the present invention.
  • 17 is a schematic block diagram of an apparatus for data transmission in accordance with another embodiment of the present invention.
  • the technical solution of the present invention can be applied to an Orthogonal Frequency Division Multiplexing (OFDM) system, for example, a WLAN system, in particular, Wireless Fidelity (WiFi), etc.; It can be applied to a single carrier (SC) system.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC single carrier
  • the method of the embodiment of the present invention may also be applied to other types of OFDM systems, and the embodiments of the present invention are not limited herein.
  • the sender device and the receiver device may be user stations (Stations, STAs) in the WLAN, and the user sites may also be referred to as systems, subscriber units, access terminals, mobile stations, mobile stations, remote stations, and remote terminals.
  • a mobile device a user terminal, a terminal, a wireless communication device, a user agent, a user device, or a user equipment (User Equipment, UE).
  • User Equipment User Equipment
  • the STA may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless local area network (A handheld device such as a Wi-Fi) communication function, a computing device, or other processing device connected to a wireless modem.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a handheld device such as a Wi-Fi communication function
  • computing device or other processing device connected to a wireless modem.
  • the sending end device and the receiving end device may also be an access point (AP, Access Point) in the WLAN, and the access point may be used to communicate with the access terminal through the wireless local area network, and transmit the data of the access terminal to the network side. Or transmit data from the network side to the access terminal.
  • AP Access Point
  • the access point may be used to communicate with the access terminal through the wireless local area network, and transmit the data of the access terminal to the network side. Or transmit data from the network side to the access terminal.
  • the receiving end device may be a communication peer corresponding to the sending end device.
  • FIG. 1 is a schematic diagram of a scenario for transmitting data applicable to an embodiment of the present invention.
  • the scenario system shown in FIG. 1 may be a WLAN system.
  • the system of FIG. 1 includes one or more access points AP 101 and one or more site STAs 102.
  • FIG. 1 exemplifies one access point and two sites. Wireless communication can be made between the access point 101 and the site 102 by various standards.
  • FIG. 2 is a schematic flow chart of a method for transmitting data for a wireless local area network, in accordance with one embodiment of the present invention.
  • the method shown in Figure 2 is performed by the source device, and the sender device can be a site or an access point.
  • the sender device is an access point
  • the receiver device is a site; when the sender device is a site, the receiver device is For the access point.
  • the method shown in FIG. 2 includes:
  • the data group in the data block BLK of the initial physical layer protocol data unit PPDU to be used for single carrier transmission is divided into L initial sub-blocks, L is greater than or equal to 2, wherein the BLK includes a data group and a guard interval GI;
  • the embodiment of the present invention divides a data group into a plurality of initial sub-blocks, and determines a phase rotation signal of each initial sub-block, and transmits data symbols of each initial sub-block and each initial sub-block to the receiving end device.
  • the phase rotation signal is multiplied to obtain the target sub-block.
  • the peak-to-average ratio of the frequency domain data of the data block is reduced, so that the receiving end can reliably recover the frequency domain signal, improving the accuracy of data transmission and the performance of the system.
  • the embodiment of the present invention can combine the target sub-blocks of the L initial sub-blocks and the GI to obtain the target BLK, that is, it can regenerate a new target BLK, and then generate the target BLK according to the target BLK.
  • the target PPDU for example, replaces the target BLK with the corresponding BLK in the initial PPDU to generate a target PPDU.
  • the target sub-block of each initial sub-block is replaced with each initial sub-block to obtain a target BLK, thereby obtaining a target PPDU.
  • step 240 and step 250 may also be described as replacing each initial sub-block with a target sub-block of each initial sub-block to obtain a target PPDU; and transmitting a target PPDU to the receiving device.
  • the physical layer protocol data unit in the embodiment of the present invention may also be referred to as the physical layer protocol in 802.11ad. Data unit frame.
  • the embodiments of the present invention are not limited thereto.
  • the PPDU in the embodiment of the present invention can meet the 802.11ad standard operating in the 60 GHz band.
  • FIG. 3 is a schematic diagram of a PPDU of the 802.11ad standard according to an embodiment of the present invention.
  • the PPDU shown in FIG. 3 includes: Short Training Field (STF), Channel Estimation (CE), Indicator Signal Field (Header), Data Field (Data), etc., wherein the STF is used for synchronization. Frequency offset estimation, Auto Gain Control (AGC) adjustment; CE is used for channel estimation; indication signal field is used to indicate an indication signal, for example, can be used to indicate the modulation mode of the data frame, and the like.
  • STF Short Training Field
  • CE Channel Estimation
  • Header Indicator Signal Field
  • Data Data
  • STF Frequency offset estimation
  • AGC Auto Gain Control
  • CE is used for channel estimation
  • indication signal field is used to indicate an indication signal, for example, can be used to indicate the modulation mode of the data frame, and the like.
  • the data block in the embodiment of the present invention may be a data block in the header, or may be a data block in the data, which is not limited by the embodiment of the present invention.
  • the Header and Data sections in the PPDU in the 802.11ad standard are composed of several data blocks (BLOCK, BLK). As shown in FIG. 4, each BLK is composed of a guard interval GI composed of 448 data strings (DATA) and 64 symbols (symbols).
  • DATA data strings
  • symbols symbols
  • the data segments may be sequentially divided to obtain L initial sub-blocks
  • n 1 , n 2 are random integers distributed between [0, 447], and n 1 and n 2 are not repeated.
  • each initial sub-block in the above example is the same, but in the embodiment of the present invention, the data group may be evenly divided into L initial sub-blocks, or may be non-uniformly divided, in other words, L initials.
  • the sub-blocks may be of the same size or different sizes, which are not limited in the embodiment of the present invention.
  • a candidate phase rotation signal group is determined from the plurality of sets of phase rotation signals, and a phase rotation signal of each of the L initial block sub-blocks is selected from the candidate phase rotation signal groups. Therefore, the peak-to-average ratio of the frequency domain data after the data of the L initial sub-blocks respectively multiplied by the corresponding phase rotation signal is converted to the frequency domain is the smallest.
  • a data block (BLK) transmitted by using a single carrier is divided, wherein the data components in each BLK are L initial sub-blocks, and each initial sub-block Multiplying the data symbol by a specific phase rotation signal Reduce the peak-to-average ratio of the frequency domain signal transformed into the frequency domain.
  • the data on each sub-block is multiplied by a specific phase rotation signal to obtain a target sub-block, wherein the target sub-block is determined according to the following formula,
  • a plurality of sets of phase rotation signal may include: e j * (0 * ⁇ ), e j * (0.5 * ⁇ ), e j * (1 * ⁇ ), e j * ( 1.5* ⁇ ) and e j*(0.25* ⁇ ) , e j*(0.75* ⁇ ) , e j*(1.25* ⁇ ) , e j*(1.75* ⁇ ) .
  • ⁇ 1 may be selected from a fixed set, ⁇ 2, ⁇ 3, ..., the value of ⁇ L. For example, it can be selected from the set (0, 180) degrees, or from the set (0, 90, 180, 270) degrees. Furthermore, we can select the phase from 0 degrees to 359 degrees in steps of 1 degree to obtain the phase selection signal.
  • the phase selection signal can be from the set e j*(0* ⁇ ) , e j*(0.5* ⁇ ) , e j*(1* ⁇ ) , e j*(1.5* ⁇ ) and e
  • the embodiment of the present invention is not limited thereto.
  • the receiver side performs the following processing:
  • Frequency domain equalization processing is performed on the received data in a target BLK, and data in each target sub-block corresponding to the time domain signal in one target BLK is multiplied by a conjugate signal of the corresponding rotation signal to eliminate phase rotation.
  • the effect of the signal Specifically, the effect of the phase rotation signal can be eliminated according to the following formula: among them For the time domain signal after the frequency domain equalization is completed corresponding to the position of the first target sub-block, a conjugate signal of a phase rotation signal of the first initial sub-block, The time domain signal corresponding to the first target sub-block.
  • a target symbol of a target sub-block of each initial sub-block has a pilot symbol, where a pilot symbol on a reserved symbol of the first target sub-block is used for estimation.
  • the phase rotation signal of the first initial sub-block, and the pilot symbols of the other target sub-blocks are used to estimate the phase difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block, so as to be received
  • the terminal estimates the phase rotation signal of each initial sub-block according to the pilot signal of the initial sub-block number.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are transmitted in the reserved symbol positions in each target sub-block, and are used by the receiver to estimate a phase rotation signal corresponding to each target sub-block, for example, the first target sub-block to the L-th target sub-block
  • the pilot symbols can be d 11 d 12 ..., d 1M , ..., d L1 d L2 ..., d LM , respectively .
  • the receiving end first performs frequency domain equalization to eliminate the influence of the channel
  • the phase of the phase rotation signal corresponding to the first target sub-block is obtained as follows: Where ⁇ means seeking phase, Representing the phase corresponding to the first target sub-block estimated by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, d lm represents the mth pilot symbol in the 1st sub-block, and n lm represents the same as in the 1st sub-block The noise corresponding to the mth pilot symbol.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the target sub-block of each initial sub-block has a pilot symbol at a reserved symbol position, and the pilot symbol is used by the receiving end to determine a phase rotation signal of each initial sub-block.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are transmitted in the reserved symbol positions in each target sub-block, and are used by the receiver to estimate a phase rotation signal corresponding to each target sub-block, for example, the first target sub-block to the L-th target sub-block
  • the pilot symbols can be d 11 d 12 ..., d 1M , ..., d L1 d L2 ..., d LM , respectively .
  • the receiving end first performs frequency domain equalization to eliminate the influence of the channel
  • the phase of the phase rotation signal corresponding to the first target sub-block is obtained as follows: Where ⁇ means seeking phase, Representing the phase corresponding to the first target sub-block estimated by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, d lm represents the mth pilot symbol in the 1st sub-block, and n lm represents the same as in the 1st sub-block The noise corresponding to the mth pilot symbol.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the first pilot symbol is transmitted at a reserved symbol position of the first target sub-block in all target sub-blocks, and the first pilot symbol is used to estimate the first initial sub-block.
  • a phase rotation signal a known transform form of the first pilot symbol transmitted at a reserved symbol position of all target sub-blocks except the first target sub-block in all target sub-blocks, the known transform form being used by the receiving end according to the transform The form estimates the phase rotation signal of the other initial sub-blocks.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are reserved in each target sub-block for the receiver to estimate the corresponding rotation signals of each block, and the pilot symbols are all M receiver unknown symbols (for example, the first pilot symbols) have passed
  • the pilot symbols of the first target sub-block to the L-th target sub-block may be d 1 , d 2 , . . . , d M , respectively. specifically:
  • the receiving end performs the following processing:
  • phase of the phase rotation signal corresponding to the first target block is obtained as follows: Where ⁇ means seeking phase, For noise. Is the inverse of f l defined by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, and d 1m represents the mth pilot symbol in the first sub-block, Indicates the mth pilot symbol in the 1st subblock, and n lm represents the noise corresponding to the mth pilot symbol in the 1st subblock.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the indication information of the phase rotation signals of all the initial sub-blocks is transmitted in the transmission data in one of the target sub-blocks, and the indication information is used by the receiving end to determine all the initial sub-blocks. Phase rotation signal.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • the indication information of the phase rotation signals of all the initial sub-blocks may be transmitted in the transmission data in any one of the target sub-blocks, for example, may be transmitted in the data transmitted by the first target sub-block.
  • the receiving end performs the following processing:
  • the first target sub-block is demodulated to obtain a phase rotation signal corresponding to all the target sub-blocks.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the target sub-block is a first target block, and the target sub-block of the fixed phase rotation signal may be configured in any one of the embodiments.
  • the plurality of sets of phase rotation signals include: a real phase rotation signal group and an imaginary phase rotation signal group, and when the data in the target BLK is a real number signal, the candidate phase rotation signal group For the real phase rotation signal group, when the data in the target BLK is an imaginary signal, the candidate phase rotation signal group is an imaginary phase rotation signal group.
  • the data component in one BLK is L initial sub-blocks
  • the combination of L phase rotation signals can only be selected from two combinations: ⁇ 1 and ⁇ 2 , where ⁇ a phase rotation signal is 1 or -1 (a phase of 0 or ⁇ ), the phase rotation signal ⁇ 2 is j or -j (the phase is or ). Or the phase rotation signal in ⁇ 1 is a real number, and the phase rotation signal in ⁇ 2 is an imaginary number.
  • the receiving end performs the following processing:
  • phase rotation signal used by the transmitter For BPSK modulation, if Then the phase rotation signal used by the transmitter is ⁇ 1 , otherwise it is ⁇ 2 .
  • real ⁇ denotes the real part of the signal
  • imag ⁇ denotes the imaginary part of the signal.
  • phase rotation signal used by the transmitter is ⁇ 1 , otherwise it is ⁇ 2 .
  • phase rotation signals of all the initial sub-blocks are preset fixed values.
  • embodiments of the present invention are applicable to situations where the content of a data frame is a fixed value, or only varies within a limited range.
  • a frame with a constant frame or data value that varies within a limited range can be found for a set of optimal phase rotation signal combinations for transmission and reception.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a fixed phase rotation signal. Get the target sub-block.
  • the receiving end performs the following processing:
  • the receiver knows the phase rotation signal, no detection is needed, and the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • the embodiment of the present invention performs data transmission and reception using a diversity method.
  • the data components in one BLK are L initial sub-blocks, and M BLKs are a group, and the phase rotation signal of each BLK in each group is from a fixed set. Select in order of time. The same processing method is used for the phase rotation signals between different BLK groups.
  • each BLK is divided into 2 initial sub-blocks, and the phase rotation signal of each initial sub-block in each BLK is from the set ⁇ [1 1], [1 j], [1 -j ], [1 -1] ⁇ are selected in turn;
  • the receiving end performs the following processing:
  • the receiver collects and selects the phase rotation signal of the transmitted signal, it is not necessary to perform detection, and the data in each target sub-block in each target BLK is multiplied by the conjugate signal of the corresponding phase rotation signal, eliminating The effect of the phase rotation signal.
  • FIG. 13 is a schematic flowchart of a method for transmitting data for a wireless local area network according to another embodiment of the present invention.
  • the method shown in Figure 13 is performed by the receiving device, and the receiving device can be a station or an access point.
  • the transmitting device is an access point
  • the receiving device is a station; when the transmitting device is a station, the receiving device is For the access point.
  • the method shown in FIG. 13 includes:
  • the data group in the target data block BLK of the target PPDU includes L target sub-blocks, L is greater than or equal to 2;
  • each target sub-block is a product of a phase rotation signal of the initial sub-block and the initial sub-block, the data peak-to-average ratio after the frequency domain transformation is small, and the frequency domain equalization is completed.
  • Data symbols in each target sub-block of the target BLK of the target PPDU The conjugate signals of the corresponding initial sub-block phase rotation signals are multiplied, eliminating the influence of the phase rotation signal, thereby obtaining the time domain signal of the target BLK. Therefore, in the embodiment of the present invention, the peak-to-average ratio of the data block to the frequency domain data can be reduced, so that the receiving end can reliably recover the frequency domain signal, and the accuracy of the data transmission and the performance of the system can be improved.
  • the PPDU in the embodiment of the present invention can meet the 802.11ad standard operating in the 60 GHz band.
  • FIG. 3 is a schematic diagram of a PPDU of the 802.11ad standard according to an embodiment of the present invention.
  • the PPDU shown in FIG. 3 includes: Short Training Field (STF), Channel Estimation (CE), Indicator Signal Field (Header), Data Field (Data), etc., wherein the STF is used for synchronization. Frequency offset estimation, Auto Gain Control (AGC) adjustment; CE is used for channel estimation; indication signal field is used to indicate an indication signal, for example, can be used to indicate the modulation mode of the data frame, and the like.
  • STF Short Training Field
  • CE Channel Estimation
  • Header Indicator Signal Field
  • Data Data
  • STF Frequency offset estimation
  • AGC Auto Gain Control
  • CE is used for channel estimation
  • indication signal field is used to indicate an indication signal, for example, can be used to indicate the modulation mode of the data frame, and the like.
  • the data block in the embodiment of the present invention may be a data block in the header, or may be a data block in the data, which is not limited by the embodiment of the present invention.
  • both the Header and Data sections in the PPDU in the 802.11ad standard are composed of a number of BLKs (BLOCKs).
  • BLOCK consists of a data set consisting of 448 symbols (DATA) and a GI consisting of 64 symbols.
  • the phase rotation signals of all the initial sub-blocks are estimated according to the pilot signals of all the target sub-blocks, wherein the first symbol is estimated according to the pilot symbols of the first target sub-block.
  • a phase rotation signal of the initial sub-block estimating a difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block according to the pilot symbols of the other target sub-blocks, according to the difference and the first one
  • the phase rotation signal of the initial sub-block determines the phase rotation signal of the other initial sub-blocks.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are transmitted in the reserved symbol positions in each target sub-block, and are used by the receiver to estimate a phase rotation signal corresponding to each target sub-block, for example, the first target sub-block to the L-th target sub-block
  • the pilot symbols can be d 11 d 12 ..., d 1M , ..., d L1 d L2 ..., d LM , respectively .
  • the receiving end first performs frequency domain equalization to eliminate the influence of the channel
  • the phase of the phase rotation signal corresponding to the first target sub-block is obtained as follows: Where ⁇ means seeking phase, Representing the phase corresponding to the first target sub-block estimated by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, d lm represents the mth pilot symbol in the 1st sub-block, and n lm represents the same as in the 1st sub-block The noise corresponding to the mth pilot symbol.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • a phase rotation signal of an initial sub-block corresponding to each target sub-block is estimated according to pilot symbols of each target sub-block.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are transmitted in the reserved symbol positions in each target sub-block, and are used by the receiver to estimate a phase rotation signal corresponding to each target sub-block, for example, the first target sub-block to the L-th target sub-block
  • the pilot symbols can be d 11 d 12 ..., d 1M , ..., d L1 d L2 ..., d LM , respectively .
  • the receiving end first performs frequency domain equalization to eliminate the influence of the channel
  • the phase of the phase rotation signal corresponding to the first target sub-block is obtained as follows: Where ⁇ means seeking phase, Representing the phase corresponding to the first target sub-block estimated by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, d lm represents the mth pilot symbol in the 1st sub-block, and n lm represents the same as in the 1st sub-block The noise corresponding to the mth pilot symbol.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • phase rotation signals of all initial sub-blocks are estimated according to pilot signals of all target sub-blocks, wherein, according to the first target sub-block of all target sub-blocks a first pilot symbol, estimating a phase rotation signal of a first initial sub-block in all initial sub-blocks; estimating a phase rotation signal of the corresponding initial sub-block from a first initial sub-block according to pilot symbols of other target sub-blocks
  • the transformation form of the phase rotation of the block according to the transformation form and the first
  • the phase rotation signal of the initial sub-block determines the phase rotation signal of the other initial sub-blocks.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • pilot symbols are reserved in each target sub-block for the receiver to estimate the corresponding rotation signals of each block, and the pilot symbols are all M receiver unknown symbols (for example, the first pilot symbols) have passed After the transform is obtained, for example, the pilot symbols of the first target sub-block to the L-th target sub-block may be respectively
  • the receiving end performs the following processing:
  • phase of the phase rotation signal corresponding to the first target block is obtained as follows: Where ⁇ means seeking phase, For noise. Is the inverse of f l defined by the receiving end, Representing the phase rotation signal of the first initial sub-block determined by the transmitting end, Indicates a time domain signal corresponding to the mth pilot symbol in the first sub-block after the frequency domain equalization processing is completed, and d 1m represents the mth pilot symbol in the first sub-block, Indicates the mth pilot symbol in the 1st subblock, and n lm represents the noise corresponding to the mth pilot symbol in the 1st subblock.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • phase rotation signals of all initial sub-blocks are determined according to indication information of phase rotation signals of all initial sub-blocks transmitted in one of the target sub-blocks. .
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a specific phase rotation signal.
  • the indication information of the phase rotation signals of all the initial sub-blocks may be transmitted in the transmission data in any one of the target sub-blocks, for example, may be transmitted in the data transmitted by the first target sub-block.
  • the receiving end performs the following processing:
  • the first target sub-block is demodulated to obtain a phase rotation signal corresponding to all the target sub-blocks.
  • the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the target sub-block configured with the fixed phase rotation signal (information information) is the first target block, and the target sub-block of the fixed phase rotation signal may be configured in any one of the embodiments of the present invention. Do not limit this.
  • a phase rotation signal of the initial sub-block is determined according to a type of data in the BLK in the target PPDU, wherein when the data in the BLK in the target PPDU is a real signal And determining that the phase rotation signal of the initial sub-block is one of the real-numbered phase selection signal groups.
  • the data in the BLK in the target PPDU is an imaginary number signal, determining that the phase rotation signal of the initial sub-block is one of the imaginary phase selection signal groups.
  • the data component in one BLK is L initial sub-blocks
  • the combination of L phase rotation signals can only be selected from two combinations: ⁇ 1 and ⁇ 2 , where ⁇ a phase rotation signal is 1 or -1 (a phase of 0 or ⁇ ), the phase rotation signal ⁇ 2 is j or -j (the phase is or ). Or the phase rotation signal in ⁇ 1 is a real number, and the phase rotation signal in ⁇ 2 is an imaginary number.
  • the receiving end performs the following processing:
  • phase rotation signal used by the transmitter For BPSK modulation, if Then the phase rotation signal used by the transmitter is ⁇ 1 , otherwise it is ⁇ 2 .
  • real ⁇ denotes the real part of the signal
  • imag ⁇ denotes the imaginary part of the signal.
  • the phase rotation signal used by the transmitter is ⁇ 1 , and vice versa is ⁇ 2 .
  • I channel corresponds to the real part of the transmitted signal
  • Q channel corresponds to the imaginary part of the transmitted signal
  • phase rotation signal used by the transmitter is ⁇ 1 , otherwise it is ⁇ 2 .
  • the preset fixed value is determined as the phase rotation signal of the initial sub-block.
  • embodiments of the present invention are applicable to situations where the content of a data frame is a fixed value, or only varies within a limited range.
  • the frame or data value that can be unchanged for these data is Frames that vary within a limited range find a combination of best performing phase rotation signals for transmission and reception.
  • the data components in one BLK are L initial sub-blocks, and each initial sub-block is multiplied by a fixed phase rotation signal. Get the target sub-block.
  • the receiving end performs the following processing:
  • the receiver knows the phase rotation signal, no detection is needed, and the data in each target sub-block is multiplied by the conjugate signal of the corresponding phase rotation signal to eliminate the influence of the phase rotation signal.
  • the phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • the embodiment of the present invention performs data transmission and reception using a diversity method.
  • the data components in one BLK are L initial sub-blocks, and M BLKs are a group, and the phase rotation signal of each BLK in each group is from a fixed set. Select in order of time. The same processing method is used for the phase rotation signals between different BLK groups.
  • the receiving end performs the following processing:
  • the receiver collects and selects the phase rotation signal of the transmitted signal, it is not necessary to perform detection, and the data in each target sub-block in each target BLK is multiplied by the conjugate signal of the corresponding phase rotation signal, eliminating The effect of the phase rotation signal.
  • the device 1400 shown in FIG. 14 may also be referred to as a sender device, and the sender device may be a site or an access point.
  • the sender device is an access point
  • the receiver device is a site; when the sender device is a site,
  • the receiving device is an access point.
  • the device 1400 shown in FIG. 14 corresponds to the method shown in FIG. 2, and the various processes in the method embodiment of FIG. 2 can be implemented.
  • For the specific function of the device 1400 refer to the corresponding description in FIG. The detailed description is omitted as appropriate.
  • the device 1400 includes a dividing unit 1410, a determining unit 1420, an obtaining unit 1430, a combining unit 1440, and a transmitting unit 1450.
  • the dividing unit 1410 is configured to divide the data group in the data block BLK of the initial physical layer protocol data unit PPDU to be used for single carrier transmission into L initial sub-blocks, where L is greater than or equal to 2, where the BLK includes the data group and the protection.
  • determining unit 1420 is configured to determine a phase rotation signal of each of the L initial sub-blocks; and obtaining unit 1430 is configured to compare the data symbols of each initial sub-block with the phase rotation signal of each initial sub-block Multiplying, the target sub-block of each initial sub-block is obtained;
  • the combining unit 1440 is configured to combine the target sub-blocks of the L initial sub-blocks and the GI to obtain the target BLK, wherein the peaks of the frequency domain data after the target BLK is transformed into the frequency domain The ratio is smaller than the peak-to-average ratio of the frequency domain data after the BLK is transformed into the frequency domain;
  • the transmitting unit 1450 is configured to generate a target PPDU according to the target BLK, and send the target PPDU to the receiving end device.
  • the embodiment of the present invention divides a data group into a plurality of initial sub-blocks, and determines a phase rotation signal of each initial sub-block, and transmits data symbols of each initial sub-block and each initial sub-block to the receiving end device.
  • the phase rotation signal is multiplied to obtain the target sub-block.
  • the peak-to-average ratio of the frequency domain data of the data block is reduced, so that the receiving end can reliably recover the frequency domain signal, improving the accuracy of data transmission and the performance of the system.
  • the dividing unit 1410 sequentially splits the data group to obtain L initial sub-blocks
  • the determining unit 1420 determines a candidate phase rotation signal group from the plurality of sets of phase rotation signals, and selects each of the L initial sub-blocks from the candidate phase rotation signal group.
  • the phase rotation signal of the initial sub-block is such that the peak-to-average ratio of the frequency domain data after the data of the L initial sub-blocks respectively multiplied by the corresponding phase rotation signal is converted to the frequency domain is the smallest.
  • the multiple sets of phase rotation signals include: e j*(0* ⁇ ) , e j*(0.5* ⁇ ) , e j*(1* ⁇ ) , e j*(1.5 * ⁇ ) and e j*(0.25* ⁇ ) , e j*(0.75* ⁇ ) , e j*(1.25* ⁇ ) , e j*(1.75* ⁇ ) .
  • a target symbol of a target sub-block of each initial sub-block has a pilot symbol, where a pilot symbol on a reserved symbol of the first target sub-block is used for estimation.
  • the phase rotation signal of the first initial sub-block, and the pilot symbols of the other target sub-blocks are used to estimate the phase difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block, so as to be received
  • the terminal estimates the phase rotation signal of each initial sub-block according to the pilot signal of the initial sub-block.
  • the target sub-block of each initial sub-block has a pilot symbol at a reserved symbol position, and the pilot symbol is used by the receiving end to determine a phase rotation signal of each initial sub-block.
  • the first pilot symbol is transmitted at a reserved symbol position of the first target sub-block in all target sub-blocks, and the first pilot symbol is used to estimate the first initial sub-block.
  • a phase rotation signal a known transform form of the first pilot symbol transmitted at a reserved symbol position of all target sub-blocks except the first target sub-block in all target sub-blocks, the known transform form being used by the receiving end according to the transform The form estimates the phase rotation signal of the other initial sub-blocks.
  • the indication information of the phase rotation signals of all the initial sub-blocks is transmitted in the transmission data in one of the target sub-blocks, and the indication information is used by the receiving end to determine all the initial sub-blocks. Phase rotation signal.
  • the data in the target BLK is a real signal or an imaginary signal
  • the plurality of sets of phase rotation signals include: a real phase rotation signal group and an imaginary phase rotation signal group.
  • the candidate phase rotation signal group is a real phase rotation signal group
  • the data in the target BLK is In the case of an imaginary signal
  • the candidate phase rotation signal group is an imaginary phase rotation signal group.
  • the determining unit 1420 determines that the phase rotation signals of all the initial sub-blocks are preset fixed values.
  • the determining unit 1420 determines that the phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • the device 1500 shown in FIG. 15 may also be referred to as a receiving end device, and the receiving end device may be a station or an access point.
  • the sending end device is an access point
  • the receiving end device is a site; when the sending end device is a site, The receiving device is an access point.
  • the device 1500 shown in FIG. 15 corresponds to the method shown in FIG. 13 and can implement various processes in the method embodiment of FIG. 13.
  • the device 1500 includes a receiving unit 1510, a determining unit 1520, and an obtaining unit 1530.
  • the receiving unit 1510 is configured to receive a target PPDU, where the data group in the target data block BLK of the target PPDU includes L target sub-blocks, L is greater than or equal to 2; the determining unit 1520 is configured to determine each of the L target sub-blocks a phase rotation signal of the initial sub-block corresponding to the target sub-block, wherein each target sub-block is a product of a phase rotation signal of the initial sub-block and the initial sub-block; and the obtaining unit 1530 is configured to complete the frequency-domain-equalized target PPDU.
  • the data symbols in each target sub-block in the target BLK are multiplied by the conjugate signal of the corresponding initial sub-block phase rotation signal to obtain a time domain signal of the target BLK.
  • each target sub-block is a product of a phase rotation signal of the initial sub-block and the initial sub-block, the data peak-to-average ratio after the frequency domain transformation is small, and the frequency domain equalization is completed.
  • the data symbols in each target sub-block of the target PPDU of the target PPDU are multiplied by the conjugate signal of the corresponding initial sub-block phase rotation signal, eliminating the influence of the phase rotation signal, thereby obtaining the time domain signal of the target BLK. Therefore, in the embodiment of the present invention, the peak-to-average ratio of the data block to the frequency domain data can be reduced, so that the receiving end can reliably recover the frequency domain signal, and the accuracy of the data transmission and the performance of the system can be improved.
  • the determining unit 1520 estimates a phase rotation signal of all the initial sub-blocks according to the pilot signals of all the target sub-blocks, where the first one is estimated according to the pilot symbols of the first target sub-block. a phase rotation signal of the initial sub-block; estimating a difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block according to the pilot symbols of the other target sub-blocks, according to the difference and the first initial The phase rotation signal of the sub-block determines the phase rotation signal of the other initial sub-blocks.
  • the determining unit 1520 is guided by each target sub-block.
  • the frequency symbol estimates a phase rotation signal of the initial sub-block corresponding to each target sub-block.
  • the determining unit 1520 estimates the phase rotation signals of all the initial sub-blocks according to the pilot signals of all the target sub-blocks, wherein the first target sub-block according to the first target sub-blocks of all the target sub-blocks a pilot symbol, estimating a phase rotation signal of the first initial sub-block in all the initial sub-blocks; estimating a phase rotation signal of the corresponding initial sub-block from the first initial sub-block according to pilot symbols of the other target sub-blocks
  • the transformed form of the phase rotation signal determines the phase rotation signal of the other initial sub-blocks according to the transformed form and the phase rotation signal of the first initial sub-block.
  • the determining unit 1520 determines the phase rotation signals of all the initial sub-blocks according to the indication information of the phase rotation signals of all the initial sub-blocks transmitted in one of the target sub-blocks.
  • the determining unit 1520 determines a phase rotation signal of the initial sub-block according to the type of data in the BLK in the target PPDU, wherein when the data in the BLK in the target PPDU is a real signal, The phase rotation signal of the initial sub-block is determined to be one of the real phase selection signal groups. When the data in the BLK in the target PPDU is an imaginary signal, it is determined that the phase rotation signal of the initial sub-block is one of the imaginary phase selection signal groups.
  • the determining unit 1520 determines the preset fixed value as the phase rotation signal of the initial sub-block.
  • the determining unit 1520 sequentially selects phase rotation signals of all the initial sub-blocks from the preset set according to the preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • FIG. 16 is a schematic block diagram of an apparatus for data transmission of a wireless local area network according to another embodiment of the present invention.
  • the device 1600 shown in FIG. 16 may also be referred to as a sender device, and the sender device may be a site or an access point.
  • the sender device is an access point
  • the receiver device is a site; when the sender device is a site,
  • the receiving device is an access point.
  • the device 1600 shown in FIG. 16 corresponds to the method shown in FIG. 1 and can implement various processes in the method embodiment of FIG. 1.
  • Apparatus 1600 includes a processor 1610, a memory 1620, a bus system 1630, and a transceiver 1640.
  • the processor 1610 calls the code stored in the memory 1620 via the bus system 1630, and the data block BLK of the initial physical layer protocol data unit PPDU to be used for single carrier transmission.
  • the data group is divided into L initial sub-blocks, L is greater than or equal to 2, wherein BLK includes a data group and a guard interval GI; a phase rotation signal is determined for each of the L initial sub-blocks; each initial sub-segment The data symbols of the block are multiplied by the phase rotation signal of each initial sub-block to obtain a target sub-block of each initial sub-block; the target sub-block of the L initial sub-blocks and the GI are obtained to obtain the target BLK, wherein the target BLK is transformed to The peak-to-average ratio of the frequency domain data after the frequency domain is smaller than the peak-to-average ratio of the frequency domain data after the BLK transform to the frequency domain; the transceiver 1640 is configured to generate a target PPDU according to the target BLK, and send the target PPDU
  • the embodiment of the present invention divides a data group into a plurality of initial sub-blocks, and determines a phase rotation signal of each initial sub-block, and transmits data symbols of each initial sub-block and each initial sub-block to the receiving end device.
  • the phase rotation signal is multiplied to obtain the target sub-block.
  • the peak-to-average ratio of the frequency domain data of the data block is reduced, so that the receiving end can reliably recover the frequency domain signal, improving the accuracy of data transmission and the performance of the system.
  • Processor 1610 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1610 or an instruction in the form of software.
  • the processor 1610 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium.
  • the storage medium is located in the memory 1620.
  • the processor 1610 reads the information in the memory 1620 and completes the steps of the foregoing method in combination with hardware.
  • the bus system 1630 may include a power bus, a control bus, and a status signal bus in addition to the data bus. Wait. However, for clarity of description, various buses are labeled as bus system 1630 in the figure.
  • the processor 1610 sequentially splits the data group to obtain L initials. Subblock
  • the processor 1610 determines a candidate phase rotation signal group from the plurality of sets of phase rotation signals, and selects a phase rotation signal of each of the L initial sub-blocks from the candidate phase rotation signal group. Therefore, the peak-to-average ratio of the frequency domain data after the data of the L initial sub-blocks respectively multiplied by the corresponding phase rotation signal is converted to the frequency domain is the smallest.
  • multiple sets of phase rotation signal comprising: e j * (0 * ⁇ ), e j * (0.5 * ⁇ ), e j * (1 * ⁇ ), e j * (1.5 * ⁇ ) and e j*(0.25* ⁇ ) , e j*(0.75* ⁇ ) , e j*(1.25* ⁇ ) , e j*(1.75* ⁇ ) .
  • a target symbol of a target sub-block of each initial sub-block has a pilot symbol, where a pilot symbol on a reserved symbol of the first target sub-block is used for estimation.
  • the phase rotation signal of the first initial sub-block, and the pilot symbols of the other target sub-blocks are used to estimate the phase difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block, so as to be received
  • the terminal estimates the phase rotation signal of each initial sub-block according to the pilot signal of the initial sub-block.
  • the target sub-block of each initial sub-block has a pilot symbol at a reserved symbol position, and the pilot symbol is used by the receiving end to determine a phase rotation signal of each initial sub-block.
  • the first pilot symbol is transmitted at a reserved symbol position of the first target sub-block in all target sub-blocks, and the first pilot symbol is used to estimate the first initial sub-block.
  • a phase rotation signal a known transform form of the first pilot symbol transmitted at a reserved symbol position of all target sub-blocks except the first target sub-block in all target sub-blocks, the known transform form being used by the receiving end according to the transform The form estimates the phase rotation signal of the other initial sub-blocks.
  • the indication information of the phase rotation signals of all the initial sub-blocks is transmitted in the transmission data in one of the target sub-blocks, and the indication information is used by the receiving end to determine all the initial sub-blocks. Phase rotation signal.
  • the data in the target BLK is a real signal or an imaginary signal
  • phase rotation signals including: a real phase rotation signal group and an imaginary phase rotation signal group,
  • the candidate phase rotation signal group is a real phase rotation signal group
  • the candidate phase rotation signal group is an imaginary phase rotation signal group.
  • the processor 1610 determines that the phase rotation signals of all the initial sub-blocks are preset fixed values.
  • the processor 1610 determines that the phase rotation signals of all the initial sub-blocks are sequentially selected from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1-1], [1 j], [1 - j] ⁇ .
  • FIG. 17 is a schematic block diagram of an apparatus for data transmission of a wireless local area network, in accordance with one embodiment of the present invention.
  • the device 1700 shown in FIG. 17 may also be referred to as a receiving end device, and the receiving end device may be a station or an access point.
  • the sending end device is an access point
  • the receiving end device is a station; when the sending end device is a station, The receiving device is an access point.
  • the device 1700 shown in FIG. 17 corresponds to the method shown in FIG. 13 and can implement various processes in the method embodiment of FIG. 13.
  • the device 1700 as shown in FIG. 17 includes a processor 1710, a memory 1720, a bus system 1730, and a transceiver 1740.
  • the transceiver 1740 receives the target PPDU, and the data group in the target data block BLK of the target PPDU includes L target sub-blocks, L is greater than or equal to 2; the processor 1710 calls the code stored in the memory 1720 through the bus system 1730, Determining a phase rotation signal of an initial sub-block corresponding to each of the L target sub-blocks, wherein each target sub-block is a product of a phase rotation signal of the initial sub-block and the initial sub-block; the frequency domain equalization is to be completed The data symbols in each of the target sub-blocks of the target PPDU of the target PPDU are multiplied by the conjugate signal of the corresponding initial sub-block phase rotation signal to obtain a time domain signal of the target BLK.
  • each target sub-block is a product of a phase rotation signal of the initial sub-block and the initial sub-block, the data peak-to-average ratio after the frequency domain transformation is small, and the frequency domain equalization is completed.
  • the data symbols in each target sub-block of the target PPDU of the target PPDU are multiplied by the conjugate signal of the corresponding initial sub-block phase rotation signal, eliminating the influence of the phase rotation signal, thereby obtaining the time domain signal of the target BLK. Therefore, in the embodiment of the present invention, the peak-to-average ratio of the data block to the frequency domain data can be reduced, so that the receiving end can reliably recover the frequency domain signal, and the accuracy of the data transmission and the performance of the system can be improved.
  • the method disclosed in the above embodiments of the present invention may be applied to the processor 1710 or implemented by the processor 1710.
  • the processor 1710 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1710 or an instruction in a form of software.
  • the processor 1710 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium.
  • the storage medium is located in the memory 1720.
  • the processor 1710 reads the information in the memory 1720 and completes the steps of the foregoing method in combination with hardware.
  • the bus system 1730 may include a power bus, a control bus, and a status signal bus in addition to the data bus. Wait. However, for clarity of description, various buses are labeled as bus system 1730 in the figure.
  • the processor 1710 estimates phase rotation signals of all initial sub-blocks according to pilot signals of all target sub-blocks, where the first one is estimated according to pilot symbols of the first target sub-block. a phase rotation signal of the initial sub-block; estimating a difference between the phase rotation signal of the corresponding initial sub-block and the phase rotation signal of the previous initial sub-block according to the pilot symbols of the other target sub-blocks, according to the difference and the first initial
  • the phase rotation signal of the sub-block determines the phase rotation signal of the other initial sub-blocks.
  • the processor 1710 estimates a phase rotation signal of the initial sub-block corresponding to each target sub-block according to the pilot symbols of each target sub-block.
  • the processor 1710 estimates the phase rotation signals of all the initial sub-blocks according to the pilot signals of all the target sub-blocks, wherein the first target sub-block according to the first target sub-blocks of all the target sub-blocks a pilot symbol, estimating a phase rotation signal of the first initial sub-block in all the initial sub-blocks; estimating a phase rotation signal of the corresponding initial sub-block from the first initial sub-block according to pilot symbols of the other target sub-blocks
  • the transformation form of the phase rotation letter, according to the transformation form and the first The phase rotation signal of the initial sub-block determines the phase rotation signal of the other initial sub-blocks.
  • the processor 1710 determines phase rotation signals of all the initial sub-blocks according to the indication information of the phase rotation signals of all the initial sub-blocks transmitted in one of the target sub-blocks.
  • the processor 1710 determines a phase rotation signal of the initial sub-block according to the type of data in the BLK in the target PPDU, wherein when the data in the BLK in the target PPDU is a real signal, The phase rotation signal of the initial sub-block is determined to be one of the real phase selection signal groups. When the data in the BLK in the target PPDU is an imaginary signal, it is determined that the phase rotation signal of the initial sub-block is one of the imaginary phase selection signal groups.
  • the processor 1710 determines the preset fixed value as the phase rotation signal of the initial sub-block.
  • the processor 1710 sequentially selects phase rotation signals of all initial sub-blocks from the preset set according to a preset rule.
  • the preset set when L is 2, the preset set includes ⁇ [1 1], [1 -1], [1 j], [1 - j] ⁇ .
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of cells is only a logical function division.
  • multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units 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 embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or 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 a software functional unit.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or its His disc storage, disk storage media or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of an instruction or data structure and that can be accessed by a computer.
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

Abstract

本发明实施例提供了一种用于无线局域网的传输数据的方法和设备,该方法包括:将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,其中BLK包括数据组和保护间隔GI;确定L个初始子块中每一个初始子块的相位旋转信号;将每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘,得到每一个初始子块的目标子块;组合L个初始子块的目标子块和GI得到目标BLK,其中,目标BLK变换到频域后的频域数据的峰均比小于BLK变换到频域后的频域数据的峰均比;根据目标BLK生成目标PPDU并发送目标PPDU。本发明实施例能够提高数据传输的准确性和系统的性能。

Description

传输数据的方法和设备
本申请要求于2015年10月09日提交中国专利局、申请号为201510647929.8、发明名称为“传输数据的方法和设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信技术领域,特别涉及一种传输数据的方法和设备。
背景技术
802.11系列标准对无线局域网络(Wireless Local Area Networks,WLAN)的标准化使得WLAN技术的成本大大降低。采用无线保真(Wireless Fidelity,Wi-Fi)无线通信技术的产品,需要通过Wi-Fi联盟认证,目的是改善基于802.11标准的无线网络产品之间的互通性,使用802.11系列协议的无线局域网可以称为Wi-Fi网络。
目前,802.11标准,历经802.11a,802.11b,802.11g,802.11n和802.11ac等各个版本,技术发展越来越成熟,提供的系统传输速度也越来越大,目前运行于5GHz频段的802.11ac最大已经可以支持1.3Gbps。另一方面,由于其特有的灵活性,在家用和商用环境中得到了越来越多的应用。
802.11ad是IEEE 802.11(或称为WLAN,无线局域网)系统中的一个分支,工作于60GHz高频段,主要用于实现家庭内部无线高清音视频信号的传输,为家庭多媒体应用带来更完备的高清视频解决方案,也称作WiGig(60GHz Wi-Fi)。相对于目前的WiFi技术,802.11ad技术在多媒体应用方面具有高容量、高速率(PHY采用OFDM多载波方案时最高传输速率可达7Gbps、采用单载波调制方案时最高传输速率可达4.6Gbps)、低延迟、低功耗等特点。
现有的单载波系统在发送端和接收端分别作如下处理:
在发射端,要发送的信息比特经过如下处理:编码调制;将编码调制后数据符号分块,每块中的符号长度为N;增加循环前缀,例如为保护间隔(Guard Interval,GI),将增加循环前缀后的数据块发送出去。
在接收端,接收经过无线衰落信道的发送信号后,具体的接收流程如下所述:将接收到的数据进行分块;删除每一块中的循环前缀;对删除循环前缀后的数据组进行FFT变换,将其变换到频域;对变换到频域后的数据利用频域信道信息进行频域均衡处理,将完成频域均衡后的数据通过IFFT变换回时域;对时域信号进行解调解码处理。
采用现有的单载波频域均衡处理算法存在如下问题,频域信道具有选择性衰落的特点:某些子载波上的信道能量低,某些子载波上的信道能量高。变换到频域的频域信号,某些子载波上的信号能量低,某些子载波上的信号能量高。在不考虑噪声,接收信号为频域信道和频域信号相乘的结果。因此,在一些特殊的情况下,信道能量高的子载波上传输的是低能量的频域信号,或者信道能量低的子载波上传输的是高能量的频域信号。这种情况下,频域信号无法可靠地恢复,从而影响整个系统的性能。
因此,如何提高数据的传输准确性,提高系统的性能成为亟待解决的问题。
发明内容
本发明实施例提供了一种传输数据的方法和设备,该方法能够提高数据传输的准确性,提高系统的性能。
第一方面,提供了一种用于无线局域网的数据传输的方法,包括:将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中该BLK包括该数据组和保护间隔GI;
确定该L个初始子块中每一个初始子块的相位旋转信号;
将该每一个初始子块的数据符号与该每一个初始子块的相位旋转信号相乘,得到该每一个初始子块的目标子块;
组合该L个初始子块的目标子块和该GI得到目标BLK,其中,该目标BLK变换到频域后的频域数据的峰均比小于该BLK变换到频域后的频域数据的峰均比;
根据该目标BLK生成目标PPDU,并向接收端设备发送该目标PPDU。
结合第一方面,在第一种可能的实现方式中,该将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始 子块,包括:
顺序分割该数据组获得该L个初始子块;
或者,
交织分割该数据组获得该L个初始子块;
或者,
随机分割该数据组获得该L个初始子块,其中,每个初始子块中包含的数据符号随机从该数据组中获得,且不同初始子块中包含的数据符号不重复。
结合第一方面或第一种可能的实现方式,在第二种可能的实现方式中,该确定该L个初始子块中每一个初始子块的相位旋转信号,包括:
从多组相位旋转信号中确定候选相位旋转信号组,从该候选相位旋转信号组中选择该L个初始子块中每一个初始子块的相位旋转信号,使得该L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
结合第二种可能的实现方式,在第三种可能的实现方式中,该多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
结合第一方面、第一至第三种可能的实现方式中的任一种可能的实现方式,在第四种可能的实现方式中,该每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计该第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
结合第一方面、第一至第三种可能的实现方式中的任一种可能的实现方式,在第五种可能的实现方式中,该每一个初始子块的目标子块的预留符号位置上具有导频符号,该导频符号用于接收端确定该每一个初始子块的的相位旋转信号。
结合第一方面、第一至第三种可能的实现方式中的任一种可能的实现方式,在第六种可能的实现方式中,所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,该第一导频符号用于估计该第一个初始子块的相位旋转信号,所有目标子块中除该第一个目标子块外的其他目标子块的 预留符号位置上传输该第一导频符号的已知变换形式,该已知变换形式用于接收端根据该变换形式估计其他初始子块的相位旋转信号。
结合第一方面、第一至第三种可能的实现方式中的任一种可能的实现方式,在第七种可能的实现方式中,所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,该指示信息用于接收端确定所有初始子块的相位旋转信号。
结合第二或第三种可能的实现方式,在第八种可能的实现方式中,该目标BLK中的数据为实数信号或虚数信号,该多组相位旋转信号,包括:实数相位旋转信号组和虚数相位旋转信号组,当该目标BLK中的数据为实数信号时,该候选相位旋转信号组为该实数相位旋转信号组,当该目标BLK中的数据为虚数信号时,该候选相位旋转信号组为该虚数相位旋转信号组。
结合第一方面或第一种可能的实现方式,在第九种可能的实现方式中,该确定该L个初始子块中每一个初始子块的相位旋转信号,包括:
确定所有初始子块的相位旋转信号为预设的固定值。
结合第一方面或第一种可能的实现方式,在第十种可能的实现方式中,该确定该L个初始子块中每一个初始子块的相位旋转信号,包括:
所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
结合第十种可能的实现方式,在第十一种可能的实现方式中,当L为2时,该预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
第二方面,提供了一种用于无线局域网的传输数据的方法,包括:
接收目标PPDU,该目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;
确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,该每一个目标子块为该初始子块与该初始子块的相位旋转信号的乘积;
将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到该目标BLK的时域信号。
结合第二方面,在第一种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据该差值和该第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
结合第二方面,在第二种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
根据该每一个目标子块的导频符号估计该每一个目标子块对应的初始子块的相位旋转信号。
结合第二方面,在第三种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据该变换形式和该第一个初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
结合第二方面,在第四种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
结合第二方面,在第五种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
根据该目标PPDU中的BLK中的数据的类型,确定该初始子块的相位旋转信号,其中,当该目标PPDU中的BLK中的数据为实数信号时,确定该初始子块的相位旋转信号为实数相位选择信号组的一个,当该目标PPDU中的BLK中的数据为虚数信号时,确定该初始子块的相位旋转信号为虚数相位选择信号组的一个。
结合第二方面,在第六种可能的实现方式中,该确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
将预设的固定值确定为该初始子块的相位旋转信号。
结合第二方面,在第七种可能的实现方式中,该确定与该L个目标子块中任意一个目标子块对应的初始子块的相位旋转信号,包括:
根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
结合第二方面的第七种可能的实现方式,在第八种可能的实现方式中,当L为2时,该预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
第三方面,提供了一种用于无线局域网的传输数据的设备,包括:
划分单元,用于将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中该BLK包括该数据组和保护间隔GI;
确定单元,用于确定该L个初始子块中每一个初始子块的相位旋转信号;
获取单元,用于将该每一个初始子块的数据符号与该每一个初始子块的相位旋转信号相乘,得到该每一个初始子块的目标子块;
组合单元,用于组合该L个初始子块的目标子块和该GI得到目标BLK,其中,该目标BLK变换到频域后的频域数据的峰均比小于该BLK变换到频域后的频域数据的峰均比;
发送单元,用于根据该目标BLK生成目标PPDU,并向接收端设备发送该目标PPDU。
结合第三方面,在第一种可能的实现方式中,该划分单元顺序分割该数据组获得该L个初始子块;
或者,
交织分割该数据组获得该L个初始子块;
或者,
随机分割该数据组获得该L个初始子块,其中,每个初始子块中包含的数据符号随机从该数据组中获得,且不同初始子块中包含的数据符号不重复。
结合第三方面或第三方面的第一种可能的实现方式,在第二种可能的实现方式中,该确定单元从多组相位旋转信号中确定候选相位旋转信号组,从该候选相位旋转信号组中选择该L个初始子块中每一个初始子块的相位旋转信号,使得该L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
结合第三方面的第二种可能的实现方式,在第三种可能的实现方式中,该多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
结合第三方面、第三方面的第一至第三种可能的实现方式中的任一种可能的实现方式,在第四种可能的实现方式中,该每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计该第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
结合第三方面、第三方面的第一至第三种可能的实现方式中的任一种可能的实现方式,在第五种可能的实现方式中,该每一个初始子块的目标子块的预留符号位置上具有导频符号,该导频符号用于接收端确定该每一个初始子块的的相位旋转信号。
结合第三方面、第三方面的第一至第三种可能的实现方式中的任一种可能的实现方式,在第六种可能的实现方式中,所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,该第一导频符号用于估计该第一个初始子块的相位旋转信号,所有目标子块中除该第一个目标子块外的其他目标子块的预留符号位置上传输该第一导频符号的已知变换形式,该已知变换形式用于接收端根据该变换形式估计其他初始子块的相位旋转信号。
结合第三方面、第三方面的第一至第三种可能的实现方式中的任一种可能的实现方式,在第七种可能的实现方式中,所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,该指示信息用于接收端确定所有初始子块的相位旋转信号。
结合第二或第三种可能的实现方式,在第八种可能的实现方式中,该目标BLK中的数据为实数信号或虚数信号,
该多组相位旋转信号,包括:实数相位旋转信号组和虚数相位旋转信号组,当该目标BLK中的数据为实数信号时,该候选相位旋转信号组为该实数相位旋转信号组,当该目标BLK中的数据为虚数信号时,该候选相位旋转信号组为该虚数相位旋转信号组。
结合第三方面或第三方面的第一种可能的实现方式,在第九种可能的实 现方式中,该确定单元确定所有初始子块的相位旋转信号为预设的固定值。
结合第三方面或第三方面的第一种可能的实现方式,在第十种可能的实现方式中,该确定单元确定所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
结合第三方面的第十种可能的实现方式,在第十一种可能的实现方式中,当L为2时,该预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
第四方面,提供了种用于无线局域网的传输数据的设备,包括:
接收单元,用于接收目标PPDU,该目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;
确定单元,用于确定与该L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,该每一个目标子块为该初始子块与该初始子块的相位旋转信号的乘积;
获取单元,用于将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到该目标BLK的时域信号。
结合第四方面,在第一种可能的实现方式中,该确定单元根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据该差值和该第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
结合第四方面,在第二种可能的实现方式中,该确定单元根据该每一个目标子块的导频符号估计该每一个目标子块对应的初始子块的相位旋转信号。
结合第四方面,在第三种可能的实现方式中,该确定单元根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据该变换形式和该第一个初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
结合第四方面,在第四种可能的实现方式中,该确定单元根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
结合第四方面,在第五种可能的实现方式中,该确定单元根据该目标PPDU中的BLK中的数据的类型,确定该初始子块的相位旋转信号,其中,当该目标PPDU中的BLK中的数据为实数信号时,确定该初始子块的相位旋转信号为实数相位选择信号组的一个,当该目标PPDU中的BLK中的数据为虚数信号时,确定该初始子块的相位旋转信号为虚数相位选择信号组的一个。
结合第四方面,在第六种可能的实现方式中,该确定单元将预设的固定值确定为该初始子块的相位旋转信号。
结合第四方面,在第七种可能的实现方式中,该确定单元根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
结合第四方面,在第八种可能的实现方式中,当L为2时,该预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
基于上述技术方案,本发明实施例通过将数据组划分为多个初始子块,并确定每一个初始子块的相位旋转信号,并向接收端设备发送每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘得到的目标子块。降低了数据块的频域数据的峰均比,使得接收端能够可靠地恢复频域信号,提高数据传输的准确性和系统的性能。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对本发明实施例中所需要使用的附图作简单地介绍,显而易见地,下面所描述的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本发明实施例可应用的传输数据的场景示意图。
图2是根据本发明一个实施例的传输数据的方法的示意性流程图。
图3是现有802.11ad中的PPDU的结构示意图。
图4是一种现有802.11ad中的数据块BLK的结构示意图。
图5是根据本发明一个实施例的数据组的结构示意图。
图6是根据本发明另一实施例的数据组的结构示意图。
图7是根据本发明另一实施例的数据组的结构示意图。
图8是根据本发明另一实施例的数据组的结构示意图。
图9是根据本发明另一实施例的数据组的结构示意图。
图10是根据本发明另一实施例的数据组的结构示意图。
图11是根据本发明另一实施例的数据组的结构示意图。
图12是根据本发明另一实施例的数据组的结构示意图。
图13是根据本发明另一实施例的传输数据的方法的示意性流程图。
图14是根据本发明一个实施例的数据传输的设备的示意框图。
图15是根据本发明另一实施例的数据传输的设备的示意框图。
图16是根据本发明另一实施例的数据传输的设备的示意框图。
图17是根据本发明另一实施例的数据传输的设备的示意框图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明的一部分实施例,而不是全部实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都应属于本发明保护的范围。
本发明的技术方案,可以应用于正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统中,例如,WLAN系统,特别是无线保真(Wireless Fidelity,WiFi)等;本发明的技术方法还可以应用于单载波(Single Carrier,SC)系统中。当然,本发明实施例的方法还可应用其它类型的OFDM系统中,本发明实施例在此不作限制。
相对应的,发送端设备和接收端设备可以是WLAN中用户站点(Station,STA),该用户站点也可以称为系统、用户单元、接入终端、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理、用户装置或用户设备(User Equipment,UE)。该STA可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字助理(Personal Digital Assistant,PDA)、具有无线局域网(例如Wi-Fi)通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备。
另外,发送端设备和接收端设备也可以是WLAN中接入点(AP,Access Point),接入点可用于与接入终端通过无线局域网进行通信,并将接入终端的数据传输至网络侧,或将来自网络侧的数据传输至接入终端。
接收端设备可以是与发送端设备相对应的通信对端。
以下,为了便于理解和说明,作为示例而非限定,以将本发明的传输数据的方法和装置在Wi-Fi系统中的执行过程和动作进行说明。
图1是本发明实施例可应用的传输数据的场景示意图。如图1所示的场景系统可以是WLAN系统,图1的系统包括一个或者多个接入点AP101和一个或者多个站点STA102,图1以一个接入点和两个站点为例。接入点101和站点102之间可以通过各种标准进行无线通信。
图2是根据本发明一个实施例的用于无线局域网的传输数据的方法的示意性流程图。图2所示的方法由发送端设备执行,发送端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。具体地,如图2所示的方法,包括:
210,将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中BLK包括数据组和保护间隔GI;
220,确定L个初始子块中每一个初始子块的相位旋转信号;
230,将每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘,得到每一个初始子块的目标子块;
240,组合L个初始子块的目标子块和GI得到目标BLK,其中,目标BLK变换到频域后的频域数据的峰均比小于BLK变换到频域后的频域数据的峰均比;
250,根据目标BLK生成目标PPDU,并向接收端设备发送目标PPDU。
因此,本发明实施例通过将数据组划分为多个初始子块,并确定每一个初始子块的相位旋转信号,并向接收端设备发送每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘得到的目标子块。降低了数据块的频域数据的峰均比,使得接收端能够可靠地恢复频域信号,提高数据传输的准确性和系统的性能。
应理解,本发明实施例可以组合L个初始子块的目标子块和GI得到目标BLK,也就说可以是重新生成一个新的目标BLK,进而根据目标BLK生 成目标PPDU,例如将目标BLK替换初始PPDU中对应的BLK,生成目标PPDU。
本发明实施例也可以在初始PPDU中,将每一个初始子块的目标子块替换每一个初始子块,得到目标BLK,进而得到目标PPDU。
换句话说,步骤240和步骤250也可以描述成使用每一个初始子块的目标子块替换每一个初始子块,获得目标PPDU;向接收端设备发送目标PPDU。
应理解,本发明实施例中的物理层协议数据单元,即物理层汇聚过程(physical layer convergence procedure,PLCP)协议数据单元(PLCP Protocol Data Unit,PPDU),也可以称为802.11ad中物理层协议数据单元帧。本发明实施例并不对此做限定。
应理解,本发明实施例中的PPDU可以满足工作于60GHz频段的802.11ad标准。
例如,图3是根据本发明一个实施例的802.11ad标准的PPDU示意图。图3所示的PPDU包括:短训练字段(Short Training Field,STF)、信道估计字段(Channel Estimation,CE)、指示信号字段(Header)、数据字段(Data)等,其中,STF用来进行同步、频偏估计、自动增益控制字段(Auto Gain Control,AGC)调整;CE用来进行信道估计;指示信号字段用于表示指示信号,例如可以用于表示该数据帧的调制方式等。
还应理解,本发明实施例中的数据块可以为Header中的数据块,也可以为Data中的数据块,本发明实施例并不对此做限定。
例如,在802.11ad标准中的PPDU中的Header和Data部分都由若干个数据块(BLOCK,BLK)构成。如图4所示,每个BLK由448个符号(symbols)组成的数据组(DATA)和64个符号(symbols)构成的保护间隔GI构成。
可选地,作为另一实施例,在210中,可以顺序分割数据组获得L个初始子块;
或者,交织分割数据组获得L个初始子块;
或者,随机分割数据组获得L个初始子块,其中,每个初始子块中包含的数据符号随机从数据组中获得,且不同初始子块中包含的数据符号不重复。
例如,一个BLK中的DATA部分表示为st(n),n=0,1,…,Nt-1,对应802.11ad 中,数据组由448个符号组成,即Nt=448。将st(n)分为L个子块(初始子块),分别为
Figure PCTCN2016090647-appb-000001
具体划分方法有三种:
均匀分割,以Nt=448,分两个子块为例,依次为:
第一子块
Figure PCTCN2016090647-appb-000002
第二子块
Figure PCTCN2016090647-appb-000003
交织分割,同样以Nt=448,分两个子块为例,依次为:
第一子块
Figure PCTCN2016090647-appb-000004
第二子块
Figure PCTCN2016090647-appb-000005
随机分割,每个子块中包含的数据符号都随机生成,且不同子块中包含的数据符号不重复。同样以Nt=448,分两个子块为例,n1,n2均为分布在[0,447]之间的随机整数,且n1和n2不重复。
第一子块
Figure PCTCN2016090647-appb-000006
第二子块
Figure PCTCN2016090647-appb-000007
应理解,上述例子中每个个初始子块的大小均相同,但在本发明实施例中,数据组可以均匀划分为L个初始子块,也可以非均匀划分,换句话说,L个初始子块可以为同一大小,也可以为不同的大小,本发明实施例并不对此做限定。
进一步地,作为另一实施例,在220中,从多组相位旋转信号中确定候选相位旋转信号组,从候选相位旋转信号组中选择L个初始子块中每一个初始子块的相位旋转信号,使得L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
具体而言,在本发明实施例中,如图5所示,划分采用单载波发送的数据块(BLK),其中,每个BLK中的数据组分成L个初始子块,每个初始子块中的数据符号乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000008
降低变换到频域的频域信号的峰均比。具体描述如下:
每个子块上的数据乘上特定的相位旋转信号获得目标子块,其中根据以下公式确定目标子块,
Figure PCTCN2016090647-appb-000009
其中,
Figure PCTCN2016090647-appb-000010
表示L个初始子块中第l初始子块,
Figure PCTCN2016090647-appb-000011
表示第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000012
表示L个初始子块中第l初始子块的目标子块。
将乘上相位后的数据(目标BLK)变换到频域上获得目标BLK的频域数据sf(k),k=0,…,N-1,其中,N=Nt+Ng,Ng为GI的长度,具体的变换有两种方式:
对长度为N的序列
Figure PCTCN2016090647-appb-000013
进行FFT变换,其中
Figure PCTCN2016090647-appb-000014
为每个子块上的数据乘上特定的相位旋转信号后的发送序列,
Figure PCTCN2016090647-appb-000015
为长度为Ng的全0序列;
对长度为N的序列
Figure PCTCN2016090647-appb-000016
进行FFT变换,其中gi为长度为Ng的GI序列;
寻找最优的相位旋转信号
Figure PCTCN2016090647-appb-000017
使sf(k)的峰均比最小,其中,峰均比的定义如下:
Figure PCTCN2016090647-appb-000018
其中PAPR表示峰均比,
Figure PCTCN2016090647-appb-000019
表示对a求平均。
可选地,作为另一实施例,多组相位旋转信号,可以包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
具体而言,为了提高接收端对相位旋转信号中的相位:φ123,…,φL估计的准确性,可以从一个固定集合中选取φ123,…,φL的值。举例而言,可以从集合(0,180)度中选取,也可以从集合(0,90,180,270)度中选取。更进一步的,我们可以从0度到359度,步长为1度来选取相位,进而得到相位选择信号。在较佳实施例中,相位选择信号可以从集合ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)中选取,本发明实施例并不限于此。
在接收机处理时,为了消除引入相位旋转信号后对接收处理的影响,接收机侧进行如下处理:
对接收到的一个目标BLK中的数据进行频域均衡处理,一个目标BLK中的时域信号对应的每一个目标子块中的数据,分别乘上相应旋转信号的共轭信号进而消除了相位旋转信号的影响。具体而言可以根据以下公式消除相位旋转信号的影响:
Figure PCTCN2016090647-appb-000020
其中
Figure PCTCN2016090647-appb-000021
为第l目标子块位置上对应的完成频域均衡后的时域信号,
Figure PCTCN2016090647-appb-000022
为第l初始子块的相位旋转信号的共轭信号,
Figure PCTCN2016090647-appb-000023
为第l目标子块对应的时域信号。
针对如何发送和接收不同初始子块的相位旋转信号,具有不同的实施例,下面分别进行详细说明。
可选地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信 号。
例如,如图6所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000024
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中在预留的符号位置上传输M个导频符号,用于接收机估计每一目标子块对应的相位旋转信号,例如,第一目标子块到第L目标子块的导频符号分别可以为d11d12…,d1M,…,dL1dL2…,dLM
相应的,接收端首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标子块对应的相位旋转信号的相位按如下方式获取:
Figure PCTCN2016090647-appb-000025
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000026
Figure PCTCN2016090647-appb-000027
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000028
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000029
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,dlm表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,导频符号用于接收端确定每一个初始子块的的相位旋转信号。
例如,如图7所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000030
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中在预留的符号位置上传输M个导频符号,用于接收机估计每一目标子块对应的相位旋转信号,例如,第一目标子块到第L目标子块的导频符号分别可以为d11d12…,d1M,…,dL1dL2…,dLM
相应的,接收端首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标子块对应的相位旋转信号的相位按如下方式获取:
Figure PCTCN2016090647-appb-000031
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000032
Figure PCTCN2016090647-appb-000033
Figure PCTCN2016090647-appb-000034
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000035
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000036
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,dlm表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,第一导频符号用于估计第一个初始子块的相位旋转信号,所有目标子块中除第一个目标子块外的其他目标子块的预留符号位置上传输第一导频符号的已知变换形式,已知变换形式用于接收端根据变换形式估计其他初始子块的相位旋转信号。
发射机的处理:
例如,如图8所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000037
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中都预留M个导频符号用于接收机估计每一块对应的旋转信号,这些导频符号都是M个接收机未知的符号(例如,第一导频符号)经过已知变换后得到的,例如,第一目标子块到第L目标子块的导频符号分别可以为分别为d1,d2,…,dM
Figure PCTCN2016090647-appb-000038
具体地:
f1(d1,d2,…,dM)=d1,d2,…,dM,
Figure PCTCN2016090647-appb-000039
Figure PCTCN2016090647-appb-000040
一种情况为,
f1(d1,d2,…,dM)=d1,d2,…,dM,fl(d1,d2,…,dM)=pl1d1,pl2d2,…,plMdM,l=2,…,L,[pl1,pl2,…,plM]为发射机和接收机都已知的符号。
另一种情况为,fl(d1,d2,…,dM)=d1,d2,…,dM,l=2,…,L,即所有的目标子块上都发送相同的符号。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标块对应的相位旋转信号的相位按如下方式获取:
Figure PCTCN2016090647-appb-000041
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000042
为噪声。
Figure PCTCN2016090647-appb-000043
Figure PCTCN2016090647-appb-000044
为fl(…)的逆变换。m=1,2,…M,
Figure PCTCN2016090647-appb-000045
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000046
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000047
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,d1m表示第1子块中的第m导频符号,
Figure PCTCN2016090647-appb-000048
表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
对于第一种情况,
fl(d1,d2,…,dM)=pl1d1,pl2d2,…,plMdM
Figure PCTCN2016090647-appb-000049
对于第二种情况,
fl(d1,d2,…,dM)=d1,d2,…,dM
Figure PCTCN2016090647-appb-000050
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,指示信息用于接收端确定所有初始子块的相位旋转信号。
例如,如图9所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000051
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
本发明实施例中可以在所有目标子块中的任意一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,例如,可以在第一目标子块传输的数据中传输所有初始子块对应的相位旋转信号指示信息。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
当在第一目标子块传输的数据中传输所有初始子块对应的相位旋转信号指示信息时,对第一目标子块进行解调处理,获取所有目标子块对应的相位旋转信号。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
应理解,本发明实施例中仅以配置固定相位旋转信号(指示信息)的目 标子块为第一目标块,实际上可以为任意一个配置固定相位旋转信号的目标子块,本发明实施例并不对此做限定。
可替代地,作为另一实施例,在220中,多组相位旋转信号,包括:实数相位旋转信号组和虚数相位旋转信号组,当目标BLK中的数据为实数信号时,候选相位旋转信号组为实数相位旋转信号组,当目标BLK中的数据为虚数信号时,候选相位旋转信号组为虚数相位旋转信号组。
本发明实施例中对BLK中的数据采用调制方式有特定要求,只适用于BPSK调制或者类似BPSK的调制,如802.11ad中的π/2BPSK调制。
BPSK调制的实现如下,假定输入的比特信号c(n)(取值为0或1),调制后的信号为s(n)=2c(n)-1,s(n)的取值为1或者-1,其中n为数据符号在BLK中的序号,取值为0,…,Nt-1,其中Nt表示数据组符号的个数,例如为448;π/2BPSK调制的实现如下:
Figure PCTCN2016090647-appb-000052
例如,如图10所示,发射端,将一个BLK中的数据组分为L个初始子块,L个相位旋转信号的组合只能从两个组合中选取:Φ1和Φ2,其中Φ1中的相位旋转信号为1或-1(相位为0或π),Φ2中的相位旋转信号为j或-j(相位为
Figure PCTCN2016090647-appb-000053
Figure PCTCN2016090647-appb-000054
)。或者说Φ1中的相位旋转信号为实数,Φ2中的相位旋转信号为虚数。
以分为两个子块为例,Φ1=[1 1]和Φ2=[j -j],也就是说,相位旋转信号的选择只能是以下两种结果中的一种:
Figure PCTCN2016090647-appb-000055
Figure PCTCN2016090647-appb-000056
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响,获得时域信号数据
Figure PCTCN2016090647-appb-000057
对于BPSK调制,如果
Figure PCTCN2016090647-appb-000058
则发射机采用的相位旋转信号为Φ1,反之则为Φ2。其中real{·}表示求信号的实部,imag{·}表示求信号的虚部。换一种说法,如果I路的能量大于Q路的能量,则发射机采 用的相位旋转信号为Φ1,反之则为Φ2。(I路对应发送信号的实部,Q路对应发送信号的虚部)
对于π/2BPSK调制,如果
Figure PCTCN2016090647-appb-000059
则发射机采用的相位旋转信号为Φ1,反之则为Φ2
可替代地,作为另一实施例,在220中,确定所有初始子块的相位旋转信号为预设的固定值。
具体而言,本发明实施例适用于数据帧的内容是固定值,或只在一个有限的范围内变化的情况。这种情况下,可以对这些数据不变的帧或数据值在有限范围内变化的帧,找出性能最优的一组相位旋转信号组合,用于发射和接收。
例如,如图11所示,发射端,将一个BLK中的数据组分为L个初始子块,每一个初始子块乘上固定的相位旋转信号
Figure PCTCN2016090647-appb-000060
得到目标子块。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
由于接收机已知相位旋转信号,不需要进行检测,每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,在220中,所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
进一步地,作为另一实施例,当L为2时,预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
换句话说,本发明实施例用分集的方法进行数据的发送和接收。
例如,如图12所示,发射端,将一个BLK中的数据组分为L个初始子块,M个BLK为一组,每组中每一个BLK的相位旋转信号从一组固定的集合中随时间顺序依次选取。不同BLK组之间相位旋转信号采用相同的处理方法。
上述处理表达成数学形式如下,Φ={Φ12,…,ΦM},
Figure PCTCN2016090647-appb-000061
每组中第m个BLK中第l个初始子块对应的相位旋转信号为
Figure PCTCN2016090647-appb-000062
举例如下:例如,如图12中(A)所示,当L为2时,即将2个BLK 分为一组,每个BLK中的数据分为2个初始子块,每个BLK中的每一初始子块的相位旋转信号从集合{[1 1],[1 j],[1 -j],[1 -1]}中依次选取;
再例如,如图12中(B)所示,当L为2时,将2个BLK分为一组,每个BLK中的数据组分为2个初始子块,每一个初始子块的相位旋转信号从集合{[1 1],[1 -1]}中依次选取;
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
由于接收机对发射信号的相位旋转信号的集合及选择方法已知,不需要进行检测,每个目标BLK中的每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
上文中结合图1至图12从发送端侧详细描述了本发明实施例的传输数据的方法,下面结合图13从接收端侧详细描述本发明实施例的传输数据的方法。
应理解,接收端侧具体的处理过程与发送端侧相对应,接收端侧的某些处理过程可以看成是发送端侧的逆运算,为避免重复,此处适当省略详细描述。
图13是根据本发明另一实施例的用于无线局域网的传输数据的方法的示意性流程图。图13所示的方法由接收端设备执行,接收端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。具体地,如图13所示的方法,包括:
1310,接收目标PPDU,目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;
1320,确定与L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,每一个目标子块为初始子块与初始子块的相位旋转信号的乘积;
1330,将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到目标BLK的时域信号。
因此,本发明实施例中由于每一个目标子块为初始子块与初始子块的相位旋转信号的乘积,所以频域变换后的数据峰均比会较小,并且由于在将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与 对应的初始子块相位旋转信号的共轭信号相乘,消除了相位旋转信号的影响,进而得到目标BLK的时域信号。因此,本发明实施例中能够降低数据块变换到频域数据的峰均比,使得接收端能够可靠地恢复频域信号,能够提高数据传输的准确性和系统的性能。
应理解,本发明实施例中的PPDU可以满足工作于60GHz频段的802.11ad标准。
例如,图3是根据本发明一个实施例的802.11ad标准的PPDU示意图。图3所示的PPDU包括:短训练字段(Short Training Field,STF)、信道估计字段(Channel Estimation,CE)、指示信号字段(Header)、数据字段(Data)等,其中,STF用来进行同步、频偏估计、自动增益控制字段(Auto Gain Control,AGC)调整;CE用来进行信道估计;指示信号字段用于表示指示信号,例如可以用于表示该数据帧的调制方式等。
还应理解,本发明实施例中的数据块可以为Header中的数据块,也可以为Data中的数据块,本发明实施例并不对此做限定。
例如,如图4所示,在802.11ad标准中的PPDU中的Header和Data部分都由若干个BLK(BLOCK,数据块)构成。每个BLOCK由448个符号组成的数据组(DATA)和64个符号构成的GI构成。
可选地,作为另一实施例,在1320中,根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据差值和第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
例如,如图6所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000063
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中在预留的符号位置上传输M个导频符号,用于接收机估计每一目标子块对应的相位旋转信号,例如,第一目标子块到第L目标子块的导频符号分别可以为d11d12…,d1M,…,dL1dL2…,dLM
相应的,接收端首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标子块对应的相位旋转信号 的相位按如下方式获取:
Figure PCTCN2016090647-appb-000064
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000065
Figure PCTCN2016090647-appb-000066
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000067
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000068
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,dlm表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,在1320中,根据每一个目标子块的导频符号估计每一个目标子块对应的初始子块的相位旋转信号。
例如,如图7所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000069
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中在预留的符号位置上传输M个导频符号,用于接收机估计每一目标子块对应的相位旋转信号,例如,第一目标子块到第L目标子块的导频符号分别可以为d11d12…,d1M,…,dL1dL2…,dLM
相应的,接收端首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标子块对应的相位旋转信号的相位按如下方式获取:
Figure PCTCN2016090647-appb-000070
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000071
Figure PCTCN2016090647-appb-000072
Figure PCTCN2016090647-appb-000073
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000074
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000075
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,dlm表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,在1320中,根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据变换形式和第一个 初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
例如,如图8所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000076
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
每一目标子块中都预留M个导频符号用于接收机估计每一块对应的旋转信号,这些导频符号都是M个接收机未知的符号(例如,第一导频符号)经过已知变换后得到的,例如,第一目标子块到第L目标子块的导频符号分别可以为分别为
f1(d1,d2,…,dM)=d1,d2,…,dM,
Figure PCTCN2016090647-appb-000077
Figure PCTCN2016090647-appb-000078
一种情况为,
f1(d1,d2,…,dM)=d1,d2,…,dM,fl(d1,d2,…,dM)=pl1d1,pl2d2,…,plMdM,l=2,…,L,[pl1,pl2,…,plM]为发射机和接收机都已知的符号。
另一种情况为,fl(d1,d2,…,dM)=d1,d2,…,dM,l=2,…,L,即所有的目标子块上都发送相同的符号。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
对完成频域均衡处理后的时域信号,第l目标块对应的相位旋转信号的相位按如下方式获取:
Figure PCTCN2016090647-appb-000079
其中∠{·}表示求相位,
Figure PCTCN2016090647-appb-000080
为噪声。
Figure PCTCN2016090647-appb-000081
Figure PCTCN2016090647-appb-000082
为fl(…)的逆变换。m=1,2,…M,
Figure PCTCN2016090647-appb-000083
表示接收端估计的第l目标子块对应的相位,
Figure PCTCN2016090647-appb-000084
表示发送端确定的第l初始子块的相位旋转信号,
Figure PCTCN2016090647-appb-000085
表示完成频域均衡处理后的第l子块中与第m导频符号对应的时域信号,d1m表示第1子块中的第m导频符号,
Figure PCTCN2016090647-appb-000086
表示第l子块中的第m导频符号,nlm表示与第l子块中的第m导频符号对应的噪声。
对于第一种情况,
fl(d1,d2,…,dM)=pl1d1,pl2d2,…,plMdM
Figure PCTCN2016090647-appb-000087
对于第二种情况,
fl(d1,d2,…,dM)=d1,d2,…,dM
Figure PCTCN2016090647-appb-000088
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,在1320中,根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
例如,如图9所示,发射端,将一个BLK中的数据组分为L个初始子块,每一初始子块乘上特定的相位旋转信号
Figure PCTCN2016090647-appb-000089
得到目标子块,其中第一初始子块的相位旋转信号可以为1或为其它已知值;
本发明实施例中可以在所有目标子块中的任意一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,例如,可以在第一目标子块传输的数据中传输所有初始子块对应的相位旋转信号指示信息。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
当在第一目标子块传输的数据中传输所有初始子块对应的相位旋转信号指示信息时,对第一目标子块进行解调处理,获取所有目标子块对应的相位旋转信号。
每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
应理解,本发明实施例中仅以配置固定相位旋转信号(指示信息)的目标子块为第一目标块,实际上可以为任意一个配置固定相位旋转信号的目标子块,本发明实施例并不对此做限定。
可替代地,作为另一实施例,在1320中,根据目标PPDU中的BLK中的数据的类型,确定初始子块的相位旋转信号,其中,当目标PPDU中的BLK中的数据为实数信号时,确定初始子块的相位旋转信号为实数相位选择信号组的一个,当目标PPDU中的BLK中的数据为虚数信号时,确定初始子块的相位旋转信号为虚数相位选择信号组的一个。
本发明实施例中对BLK中的数据采用调制方式有特定要求,只适用于BPSK调制或者类似BPSK的调制,如802.11ad中的π/2BPSK调制。
BPSK调制的实现如下,假定输入的比特信号c(n)(取值为0或1),调制 后的信号为s(n)=2c(n)-1,s(n)的取值为1或者-1,其中n为数据符号在BLK中的序号,取值为0,…,Nt-1,其中Nt表示数据组符号的个数,例如为448;π/2BPSK调制的实现如下:
Figure PCTCN2016090647-appb-000090
例如,如图10所示,发射端,将一个BLK中的数据组分为L个初始子块,L个相位旋转信号的组合只能从两个组合中选取:Φ1和Φ2,其中Φ1中的相位旋转信号为1或-1(相位为0或π),Φ2中的相位旋转信号为j或-j(相位为
Figure PCTCN2016090647-appb-000091
Figure PCTCN2016090647-appb-000092
)。或者说Φ1中的相位旋转信号为实数,Φ2中的相位旋转信号为虚数。
以分为两个子块为例,Φ1=[1 1]和Φ2=[j -j],也就是说,相位旋转信号的选择只能是以下两种结果中的一种:
Figure PCTCN2016090647-appb-000093
Figure PCTCN2016090647-appb-000094
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响,获得时域信号数据
Figure PCTCN2016090647-appb-000095
对于BPSK调制,如果
Figure PCTCN2016090647-appb-000096
则发射机采用的相位旋转信号为Φ1,反之则为Φ2。其中real{·}表示求信号的实部,imag{·}表示求信号的虚部。换一种说法,如果I路的能量大于Q路的能量,则发射机采用的相位旋转信号为Φ1,反之则为Φ2。(I路对应发送信号的实部,Q路对应发送信号的虚部)
对于π/2BPSK调制,如果
Figure PCTCN2016090647-appb-000097
则发射机采用的相位旋转信号为Φ1,反之则为Φ2
可替代地,作为另一实施例,在1320中,将预设的固定值确定为初始子块的相位旋转信号。
具体而言,本发明实施例适用于数据帧的内容是固定值,或只在一个有限的范围内变化的情况。这种情况下,可以对这些数据不变的帧或数据值在 有限范围内变化的帧,找出性能最优的一组相位旋转信号组合,用于发射和接收。
例如,如图11所示,发射端,将一个BLK中的数据组分为L个初始子块,每一个初始子块乘上固定的相位旋转信号
Figure PCTCN2016090647-appb-000098
得到目标子块。
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
由于接收机已知相位旋转信号,不需要进行检测,每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
可替代地,作为另一实施例,在1320中,根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
进一步地,当L为2时,预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
换句话说,本发明实施例用分集的方法进行数据的发送和接收。
例如,如图12所示,发射端,将一个BLK中的数据组分为L个初始子块,M个BLK为一组,每组中每一个BLK的相位旋转信号从一组固定的集合中随时间顺序依次选取。不同BLK组之间相位旋转信号采用相同的处理方法。
上述处理表达成数学形式如下,Φ={Φ12,…,ΦM},
Figure PCTCN2016090647-appb-000099
每组中第m个BLK中第l个初始子块对应的相位旋转信号为
Figure PCTCN2016090647-appb-000100
举例如下:例如,当L为2时,即将2个BLK分为一组,每个BLK中的数据分为2个初始子块,每个BLK中的每一初始子块的相位旋转信号从集合{[1 1],[1 j],[1 -j],[1 -1]}中依次选取;
再例如,当L为2时,将2个BLK分为一组,每个BLK中的数据组分为2个初始子块,每一个初始子块的相位旋转信号从集合{[1 1],[1 -1]}中依次选取;
相应的,接收端进行如下处理:
首先进行频域均衡,消除信道的影响;
由于接收机对发射信号的相位旋转信号的集合及选择方法已知,不需要进行检测,每个目标BLK中的每一目标子块中的数据乘上对应的相位旋转信号的共轭信号,消除相位旋转信号的影响。
上文中结合图1至图13细描述了本发明实施例的传输数据的方法,下 面结合图14-图17细描述本发明实施例的传输数据的设备。
图14是根据本发明一个实施例的用于无线局域网的数据传输的设备的示意框图。图14所示的设备1400也可以称为发送端设备,发送端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。应理解图14所示的设备1400与图2所示的方法相对应,能够实现图2方法实施例中的各个过程,设备1400的具体功能可参见图2中的相应描述,为避免重复,此处适当省略详细描述。
具体地,设备1400包括:划分单元1410、确定单元1420、获取单元1430、组合单元1440和发送单元1450。
其中,划分单元1410用于将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中BLK包括数据组和保护间隔GI;确定单元1420用于确定L个初始子块中每一个初始子块的相位旋转信号;获取单元1430用于将每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘,得到每一个初始子块的目标子块;组合单元1440用于组合L个初始子块的目标子块和GI得到目标BLK,其中,目标BLK变换到频域后的频域数据的峰均比小于BLK变换到频域后的频域数据的峰均比;发送单元1450用于根据目标BLK生成目标PPDU,并向接收端设备发送目标PPDU。
因此,本发明实施例通过将数据组划分为多个初始子块,并确定每一个初始子块的相位旋转信号,并向接收端设备发送每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘得到的目标子块。降低了数据块的频域数据的峰均比,使得接收端能够可靠地恢复频域信号,提高数据传输的准确性和系统的性能。
可选地,作为另一实施例,划分单元1410顺序分割数据组获得L个初始子块;
或者,交织分割数据组获得L个初始子块;
或者,随机分割数据组获得L个初始子块,其中,每个初始子块中包含的数据符号随机从数据组中获得,且不同初始子块中包含的数据符号不重复。
可选地,作为另一实施例,确定单元1420从多组相位旋转信号中确定候选相位旋转信号组,从候选相位旋转信号组中选择L个初始子块中每一个 初始子块的相位旋转信号,使得L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
可选地,作为另一实施例,多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
可选地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
可替代地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,导频符号用于接收端确定每一个初始子块的的相位旋转信号。
可替代地,作为另一实施例,所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,第一导频符号用于估计第一个初始子块的相位旋转信号,所有目标子块中除第一个目标子块外的其他目标子块的预留符号位置上传输第一导频符号的已知变换形式,已知变换形式用于接收端根据变换形式估计其他初始子块的相位旋转信号。
可替代地,作为另一实施例,所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,指示信息用于接收端确定所有初始子块的相位旋转信号。
可替代地,作为另一实施例,目标BLK中的数据为实数信号或虚数信号,
多组相位旋转信号,包括:实数相位旋转信号组和虚数相位旋转信号组,当目标BLK中的数据为实数信号时,候选相位旋转信号组为实数相位旋转信号组,当目标BLK中的数据为虚数信号时,候选相位旋转信号组为虚数相位旋转信号组。
可选地,作为另一实施例,确定单元1420确定所有初始子块的相位旋转信号为预设的固定值。
可替代地,作为另一实施例,确定单元1420确定所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
进一步地,作为另一实施例,当L为2时,预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
图15是根据本发明一个实施例的用于无线局域网的数据传输的设备的示意框图。图15所示的设备1500也可以称为接收端设备,接收端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。应理解图15所示的设备1500与图13所示的方法相对应,能够实现图13方法实施例中的各个过程,设备1500的具体功能可参见图13中的相应描述,为避免重复,此处适当省略详细描述。
具体地,设备1500包括:接收单元1510、确定单元1520和获取单元1530。
其中,接收单元1510用于接收目标PPDU,目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;确定单元1520用于确定与L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,每一个目标子块为初始子块与初始子块的相位旋转信号的乘积;获取单元1530用于将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到目标BLK的时域信号。
因此,本发明实施例中由于每一个目标子块为初始子块与初始子块的相位旋转信号的乘积,所以频域变换后的数据峰均比会较小,并且由于在将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,消除了相位旋转信号的影响,进而得到目标BLK的时域信号。因此,本发明实施例中能够降低数据块变换到频域数据的峰均比,使得接收端能够可靠地恢复频域信号,能够提高数据传输的准确性和系统的性能。
可选地,作为另一实施例,确定单元1520根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据差值和第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
可替代地,作为另一实施例,确定单元1520根据每一个目标子块的导 频符号估计每一个目标子块对应的初始子块的相位旋转信号。
可替代地,作为另一实施例,确定单元1520根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据变换形式和第一个初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
可替代地,作为另一实施例,确定单元1520根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
可替代地,作为另一实施例,确定单元1520根据目标PPDU中的BLK中的数据的类型,确定初始子块的相位旋转信号,其中,当目标PPDU中的BLK中的数据为实数信号时,确定初始子块的相位旋转信号为实数相位选择信号组的一个,当目标PPDU中的BLK中的数据为虚数信号时,确定初始子块的相位旋转信号为虚数相位选择信号组的一个。
可替代地,作为另一实施例,确定单元1520将预设的固定值确定为初始子块的相位旋转信号。
可替代地,作为另一实施例,确定单元1520根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
可替代地,作为另一实施例,当L为2时,预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
图16是根据本发明另一实施例的用于无线局域网的数据传输的设备的示意框图。图16所示的设备1600也可以称为发送端设备,发送端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。应理解图16所示的设备1600与图1所示的方法相对应,能够实现图1方法实施例中的各个过程,设备1600的具体功能可参见图1中的相应描述,为避免重复,此处适当省略详细描述。
如图16所示的设备1600包括处理器1610、存储器1620、总线系统1630和收发器1640。
具体地,处理器1610通过总线系统1630调用存储在存储器1620中的代码,将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK 中的数据组划分为L个初始子块,L大于或等于2,其中BLK包括数据组和保护间隔GI;确定L个初始子块中每一个初始子块的相位旋转信号;将每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘,得到每一个初始子块的目标子块;组合L个初始子块的目标子块和GI得到目标BLK,其中,目标BLK变换到频域后的频域数据的峰均比小于BLK变换到频域后的频域数据的峰均比;收发器1640用于根据目标BLK生成目标PPDU,并向接收端设备发送目标PPDU。
因此,本发明实施例通过将数据组划分为多个初始子块,并确定每一个初始子块的相位旋转信号,并向接收端设备发送每一个初始子块的数据符号与每一个初始子块的相位旋转信号相乘得到的目标子块。降低了数据块的频域数据的峰均比,使得接收端能够可靠地恢复频域信号,提高数据传输的准确性和系统的性能。
上述本发明实施例揭示的方法可以应用于处理器1610中,或者由处理器1610实现。处理器1610可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器1610中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器1610可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存取存储器(Random Access Memory,RAM)、闪存、只读存储器(Read-Only Memory,ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1620,处理器1610读取存储器1620中的信息,结合其硬件完成上述方法的步骤,该总线系统1630除包括数据总线之外,还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见,在图中将各种总线都标为总线系统1630。
可选地,作为另一实施例,处理器1610顺序分割数据组获得L个初始 子块;
或者,交织分割数据组获得L个初始子块;
或者,随机分割数据组获得L个初始子块,其中,每个初始子块中包含的数据符号随机从数据组中获得,且不同初始子块中包含的数据符号不重复。
可选地,作为另一实施例,处理器1610从多组相位旋转信号中确定候选相位旋转信号组,从候选相位旋转信号组中选择L个初始子块中每一个初始子块的相位旋转信号,使得L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
可选地,作为另一实施例,多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
可选地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
可替代地,作为另一实施例,每一个初始子块的目标子块的预留符号位置上具有导频符号,导频符号用于接收端确定每一个初始子块的的相位旋转信号。
可替代地,作为另一实施例,所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,第一导频符号用于估计第一个初始子块的相位旋转信号,所有目标子块中除第一个目标子块外的其他目标子块的预留符号位置上传输第一导频符号的已知变换形式,已知变换形式用于接收端根据变换形式估计其他初始子块的相位旋转信号。
可替代地,作为另一实施例,所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,指示信息用于接收端确定所有初始子块的相位旋转信号。
可替代地,作为另一实施例,目标BLK中的数据为实数信号或虚数信号,
多组相位旋转信号,包括:实数相位旋转信号组和虚数相位旋转信号组, 当目标BLK中的数据为实数信号时,候选相位旋转信号组为实数相位旋转信号组,当目标BLK中的数据为虚数信号时,候选相位旋转信号组为虚数相位旋转信号组。
可选地,作为另一实施例,处理器1610确定所有初始子块的相位旋转信号为预设的固定值。
可替代地,作为另一实施例,处理器1610确定所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
进一步地,作为另一实施例,当L为2时,预设集合包括{[1 1],[1-1],[1 j],[1–j]}。
图17是根据本发明一个实施例的用于无线局域网的数据传输的设备的示意框图。图17所示的设备1700也可以称为接收端设备,接收端设备可以为站点或接入点,当发送端设备为接入点时,接收端设备为站点;当发送端设备为站点时,接收端设备为接入点。应理解图17所示的设备1700与图13所示的方法相对应,能够实现图13方法实施例中的各个过程,设备1700的具体功能可参见图13中的相应描述,为避免重复,此处适当省略详细描述。
如图17所示的设备1700包括处理器1710、存储器1720、总线系统1730和收发器1740。
具体地,收发器1740接收目标PPDU,目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;处理器1710通过总线系统1730调用存储在存储器1720中的代码,确定与L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,每一个目标子块为初始子块与初始子块的相位旋转信号的乘积;将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到目标BLK的时域信号。
因此,本发明实施例中由于每一个目标子块为初始子块与初始子块的相位旋转信号的乘积,所以频域变换后的数据峰均比会较小,并且由于在将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,消除了相位旋转信号的影响,进而得到目标BLK的时域信号。因此,本发明实施例中能够降低数据块变换到频域数据的峰均比,使得接收端能够可靠地恢复频域信号,能够提高数据传输的准确性和系统的性能。
上述本发明实施例揭示的方法可以应用于处理器1710中,或者由处理器1710实现。处理器1710可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器1710中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器1710可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存取存储器(Random Access Memory,RAM)、闪存、只读存储器(Read-Only Memory,ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1720,处理器1710读取存储器1720中的信息,结合其硬件完成上述方法的步骤,该总线系统1730除包括数据总线之外,还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见,在图中将各种总线都标为总线系统1730。
可选地,作为另一实施例,处理器1710根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据差值和第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
可替代地,作为另一实施例,处理器1710根据每一个目标子块的导频符号估计每一个目标子块对应的初始子块的相位旋转信号。
可替代地,作为另一实施例,处理器1710根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据变换形式和第一个 初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
可替代地,作为另一实施例,处理器1710根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
可替代地,作为另一实施例,处理器1710根据目标PPDU中的BLK中的数据的类型,确定初始子块的相位旋转信号,其中,当目标PPDU中的BLK中的数据为实数信号时,确定初始子块的相位旋转信号为实数相位选择信号组的一个,当目标PPDU中的BLK中的数据为虚数信号时,确定初始子块的相位旋转信号为虚数相位选择信号组的一个。
可替代地,作为另一实施例,处理器1710将预设的固定值确定为初始子块的相位旋转信号。
可替代地,作为另一实施例,处理器1710根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
可替代地,作为另一实施例,当L为2时,预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
应理解,说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解,在本发明的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
另外,本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
应理解,在本发明实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各 示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本发明可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其 他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的,盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本发明技术方案的较佳实施例而已,并非用于限定本发明的保护范围。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (42)

  1. 一种用于无线局域网的传输数据的方法,其特征在于,包括:
    将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中所述BLK包括所述数据组和保护间隔GI;
    确定所述L个初始子块中每一个初始子块的相位旋转信号;
    将所述每一个初始子块的数据符号与所述每一个初始子块的相位旋转信号相乘,得到所述每一个初始子块的目标子块;
    组合所述L个初始子块的目标子块和所述GI得到目标BLK,其中,所述目标BLK变换到频域后的频域数据的峰均比小于所述BLK变换到频域后的频域数据的峰均比;
    根据所述目标BLK生成目标PPDU,并向接收端设备发送所述目标PPDU。
  2. 根据权利要求1所述的方法,其特征在于,所述将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,包括:
    顺序分割所述数据组获得所述L个初始子块;
    或者,
    交织分割所述数据组获得所述L个初始子块;
    或者,
    随机分割所述数据组获得所述L个初始子块,其中,每个初始子块中包含的数据符号随机从所述数据组中获得,且不同初始子块中包含的数据符号不重复。
  3. 根据权利要求1或2所述的方法,其特征在于,所述确定所述L个初始子块中每一个初始子块的相位旋转信号,包括:
    从多组相位旋转信号中确定候选相位旋转信号组,从所述候选相位旋转信号组中选择所述L个初始子块中每一个初始子块的相位旋转信号,使得所述L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
  4. 根据权利要求3所述的方法,其特征在于,所述多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
  5. 根据权利要求1至4中任一项所述的方法,其特征在于,
    所述每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计所述第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
  6. 根据权利要求1至4中任一项所述的方法,其特征在于,
    所述每一个初始子块的目标子块的预留符号位置上具有导频符号,所述导频符号用于接收端确定所述每一个初始子块的的相位旋转信号。
  7. 根据权利要求1至4中任一项所述的方法,其特征在于,
    所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,所述第一导频符号用于估计所述第一个初始子块的相位旋转信号,所有目标子块中除所述第一个目标子块外的其他目标子块的预留符号位置上传输所述第一导频符号的已知变换形式,所述已知变换形式用于接收端根据所述变换形式估计其他初始子块的相位旋转信号。
  8. 根据权利要求1至4中任一项所述的方法,其特征在于,
    所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,所述指示信息用于接收端确定所有初始子块的相位旋转信号。
  9. 根据权利要求3或4所述的方法,其特征在于,所述目标BLK中的数据为实数信号或虚数信号,
    所述多组相位旋转信号包括实数相位旋转信号组和虚数相位旋转信号组,当所述目标BLK中的数据为实数信号时,所述候选相位旋转信号组为所述实数相位旋转信号组,当所述目标BLK中的数据为虚数信号时,所述候选相位旋转信号组为所述虚数相位旋转信号组。
  10. 根据权利要求1或2所述的方法,其特征在于,
    所述确定所述L个初始子块中每一个初始子块的相位旋转信号,包括:
    确定所有初始子块的相位旋转信号为预设的固定值。
  11. 根据权利要求1或2所述的方法,其特征在于,
    所述确定所述L个初始子块中每一个初始子块的相位旋转信号,包括:
    所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取 获得。
  12. 根据权利要求11所述的方法,其特征在于,
    当L为2时,所述预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
  13. 一种用于无线局域网的传输数据的方法,其特征在于,包括:
    接收目标PPDU,所述目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;
    确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,所述每一个目标子块为所述初始子块与所述初始子块的相位旋转信号的乘积;
    将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到所述目标BLK的时域信号。
  14. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据所述差值和所述第一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
  15. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    根据所述每一个目标子块的导频符号估计所述每一个目标子块对应的初始子块的相位旋转信号。
  16. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据所述变换形式和所述第一个初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
  17. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
  18. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    根据所述目标PPDU中的BLK中的数据的类型,确定所述初始子块的相位旋转信号,其中,当所述目标PPDU中的BLK中的数据为实数信号时,确定所述初始子块的相位旋转信号为实数相位选择信号组的一个,当所述目标PPDU中的BLK中的数据为虚数信号时,确定所述初始子块的相位旋转信号为虚数相位选择信号组的一个。
  19. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,包括:
    将预设的固定值确定为所述初始子块的相位旋转信号。
  20. 根据权利要求13所述的方法,其特征在于,所述确定与所述L个目标子块中任意一个目标子块对应的初始子块的相位旋转信号,包括:
    根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
  21. 根据权利要求20所述的方法,其特征在于,
    当L为2时,所述预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
  22. 一种用于无线局域网的传输数据的设备,其特征在于,包括:
    划分单元,用于将待采用单载波传输的初始物理层协议数据单元PPDU的数据块BLK中的数据组划分为L个初始子块,L大于或等于2,其中所述BLK包括所述数据组和保护间隔GI;
    确定单元,用于确定所述L个初始子块中每一个初始子块的相位旋转信号;
    获取单元,用于将所述每一个初始子块的数据符号与所述每一个初始子块的相位旋转信号相乘,得到所述每一个初始子块的目标子块;
    组合单元,用于组合所述L个初始子块的目标子块和所述GI得到目标BLK,其中,所述目标BLK变换到频域后的频域数据的峰均比小于所述BLK变换到频域后的频域数据的峰均比;
    发送单元,用于根据所述目标BLK生成目标PPDU,并向接收端设备 发送所述目标PPDU。
  23. 根据权利要求22所述的设备,其特征在于,
    所述划分单元顺序分割所述数据组获得所述L个初始子块;
    或者,
    交织分割所述数据组获得所述L个初始子块;
    或者,
    随机分割所述数据组获得所述L个初始子块,其中,每个初始子块中包含的数据符号随机从所述数据组中获得,且不同初始子块中包含的数据符号不重复。
  24. 根据权利要求22或23所述的设备,其特征在于,
    所述确定单元从多组相位旋转信号中确定候选相位旋转信号组,从所述候选相位旋转信号组中选择所述L个初始子块中每一个初始子块的相位旋转信号,使得所述L个初始子块分别与对应的相位旋转信号相乘后的数据变换到频域后的频域数据的峰均比最小。
  25. 根据权利要求24所述的设备,其特征在于,所述多组相位旋转信号,包括:ej*(0*π),ej*(0.5*π),ej*(1*π),ej*(1.5*π)和ej*(0.25*π),ej*(0.75*π),ej*(1.25*π),ej*(1.75*π)
  26. 根据权利要求22至25中任一项所述的设备,其特征在于,
    所述每一个初始子块的目标子块的预留符号位置上具有导频符号,其中,第一个目标子块的预留符号上的导频符号用于估计所述第一个初始子块的相位旋转信号,其他的目标子块的导频符号用于估计对应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的相位差值,以便于接收端根据初始子块的导频信号估计每一个初始子块的相位旋转信号。
  27. 根据权利要求22至25中任一项所述的设备,其特征在于,
    所述每一个初始子块的目标子块的预留符号位置上具有导频符号,所述导频符号用于接收端确定所述每一个初始子块的的相位旋转信号。
  28. 根据权利要求22至25中任一项所述的设备,其特征在于,
    所有目标子块中的第一个目标子块的预留符号位置上传输第一导频符号,所述第一导频符号用于估计所述第一个初始子块的相位旋转信号,所有目标子块中除所述第一个目标子块外的其他目标子块的预留符号位置上传输所述第一导频符号的已知变换形式,所述已知变换形式用于接收端根据所述变换形式估计其他初始子块的相位旋转信号。
  29. 根据权利要求22至25中任一项所述的设备,其特征在于,
    所有目标子块中的其中一个目标子块中的传输数据中传输所有初始子块的相位旋转信号的指示信息,所述指示信息用于接收端确定所有初始子块的相位旋转信号。
  30. 根据权利要求24或25所述的设备,其特征在于,所述目标BLK中的数据为实数信号或虚数信号,
    所述多组相位旋转信号包括实数相位旋转信号组和虚数相位旋转信号组,当所述目标BLK中的数据为实数信号时,所述候选相位旋转信号组为所述实数相位旋转信号组,当所述目标BLK中的数据为虚数信号时,所述候选相位旋转信号组为所述虚数相位旋转信号组。
  31. 根据权利要求22或23所述的设备,其特征在于,
    所述确定单元确定所有初始子块的相位旋转信号为预设的固定值。
  32. 根据权利要求22或23所述的设备,其特征在于,
    所述确定单元确定所有初始子块的相位旋转信号为按照预设规则从预设集合中依次选取获得。
  33. 根据权利要求32所述的设备,其特征在于,
    当L为2时,所述预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
  34. 一种用于无线局域网的传输数据的设备,其特征在于,包括:
    接收单元,用于接收目标PPDU,所述目标PPDU的目标数据块BLK中的数据组包括L个目标子块,L大于或等于2;
    确定单元,用于确定与所述L个目标子块中每一个目标子块对应的初始子块的相位旋转信号,其中,所述每一个目标子块为所述初始子块与所述初始子块的相位旋转信号的乘积;
    获取单元,用于将完成频域均衡后的目标PPDU的目标BLK中每一个目标子块中的数据符号与对应的初始子块相位旋转信号的共轭信号相乘,得到所述目标BLK的时域信号。
  35. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据第一个目标子块的导频符号估计第一个初始子块的相位旋转信号;根据其他的目标子块的导频符号估计相应的初始子块的相位旋转信号与前一个初始子块的相位旋转信号的差值,根据所述差值和所述第 一个初始子块的相位旋转信号确定出其他的初始子块的相位旋转信号。
  36. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据所述每一个目标子块的导频符号估计所述每一个目标子块对应的初始子块的相位旋转信号。
  37. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据所有的目标子块的导频信号估计所有初始子块的相位旋转信号,其中,根据所有目标子块中的第一个目标子块的第一导频符号,估计所有初始子块中的第一个初始子块的相位旋转信号;根据其他目标子块的的导频符号估计相应的初始子块的相位旋转信号相对第一个初始子块的相位旋转信的变换形式,根据所述变换形式和所述第一个初始子块的相位旋转信号确定其他初始子块的相位旋转信号。
  38. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据所有目标子块中的其中一个目标子块中传输的所有初始子块的相位旋转信号的指示信息,确定所有初始子块的相位旋转信号。
  39. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据所述目标PPDU中的BLK中的数据的类型,确定所述初始子块的相位旋转信号,其中,当所述目标PPDU中的BLK中的数据为实数信号时,确定所述初始子块的相位旋转信号为实数相位选择信号组的一个,当所述目标PPDU中的BLK中的数据为虚数信号时,确定所述初始子块的相位旋转信号为虚数相位选择信号组的一个。
  40. 根据权利要求34所述的设备,其特征在于,
    所述确定单元将预设的固定值确定为所述初始子块的相位旋转信号。
  41. 根据权利要求34所述的设备,其特征在于,
    所述确定单元根据照预设规则从预设集合中依次选取所有初始子块的相位旋转信号。
  42. 根据权利要求41所述的设备,其特征在于,
    当L为2时,所述预设集合包括{[1 1],[1 -1],[1 j],[1 –j]}。
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Publication number Priority date Publication date Assignee Title
CN109412764B (zh) * 2017-08-17 2022-07-29 华为技术有限公司 同步方法和装置
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CN110191077B (zh) * 2019-06-04 2022-01-25 广东电网有限责任公司 一种降低papr的方法、装置、设备及存储介质
US20220263636A1 (en) * 2021-02-17 2022-08-18 Mediatek Singapore Pte. Ltd. EHT-STF Transmission For Distributed-Tone Resource Units In 6GHz Low-Power Indoor Systems

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1666452A (zh) * 2002-07-08 2005-09-07 三星电子株式会社 用于在正交频分复用通信系统中发送和接收关于选择性映射的辅助信息的设备和方法
CN101087284A (zh) * 2006-06-09 2007-12-12 罗仁泽 一种降低ofdm信号峰平比的联合方法
US20110249660A1 (en) * 2010-04-08 2011-10-13 Lg Electronics Inc. Method for transmitting ppdu in wireless local area network and apparatus for the same
CN102238126A (zh) * 2011-06-22 2011-11-09 华中科技大学 基于选择性序列降低ofdm/oqam系统的峰均功率比的方法
CN102916923A (zh) * 2012-10-11 2013-02-06 华中科技大学 一种降低多载波系统峰均功率比的信息传输方法
CN103428155A (zh) * 2013-08-30 2013-12-04 电子科技大学 降低ofdm系统的papr的pts方法
CN103441769A (zh) * 2013-08-31 2013-12-11 电子科技大学 一种降低ofdm系统的papr的pts方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101374125B (zh) * 2007-08-24 2011-03-09 大唐移动通信设备有限公司 一种降低峰均比的方法和装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1666452A (zh) * 2002-07-08 2005-09-07 三星电子株式会社 用于在正交频分复用通信系统中发送和接收关于选择性映射的辅助信息的设备和方法
CN101087284A (zh) * 2006-06-09 2007-12-12 罗仁泽 一种降低ofdm信号峰平比的联合方法
US20110249660A1 (en) * 2010-04-08 2011-10-13 Lg Electronics Inc. Method for transmitting ppdu in wireless local area network and apparatus for the same
CN102238126A (zh) * 2011-06-22 2011-11-09 华中科技大学 基于选择性序列降低ofdm/oqam系统的峰均功率比的方法
CN102916923A (zh) * 2012-10-11 2013-02-06 华中科技大学 一种降低多载波系统峰均功率比的信息传输方法
CN103428155A (zh) * 2013-08-30 2013-12-04 电子科技大学 降低ofdm系统的papr的pts方法
CN103441769A (zh) * 2013-08-31 2013-12-11 电子科技大学 一种降低ofdm系统的papr的pts方法

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