WO2015032084A1 - 一种数据接收方法以及接收机 - Google Patents

一种数据接收方法以及接收机 Download PDF

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Publication number
WO2015032084A1
WO2015032084A1 PCT/CN2013/083120 CN2013083120W WO2015032084A1 WO 2015032084 A1 WO2015032084 A1 WO 2015032084A1 CN 2013083120 W CN2013083120 W CN 2013083120W WO 2015032084 A1 WO2015032084 A1 WO 2015032084A1
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WO
WIPO (PCT)
Prior art keywords
length
frame
tail
trailing
truncation
Prior art date
Application number
PCT/CN2013/083120
Other languages
English (en)
French (fr)
Inventor
吴丹
陈磊
闵雷
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380078001.1A priority Critical patent/CN105379215B/zh
Priority to PCT/CN2013/083120 priority patent/WO2015032084A1/zh
Publication of WO2015032084A1 publication Critical patent/WO2015032084A1/zh
Priority to US15/065,367 priority patent/US9712366B2/en

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Classifications

    • 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
    • H04L27/2602Signal structure
    • 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
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2655Synchronisation arrangements
    • H04L27/2656Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • 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
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2649Demodulators
    • H04L27/26534Pulse-shaped multi-carrier, i.e. not using rectangular window
    • H04L27/2654Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]

Definitions

  • the present invention relates to the field of communications, and in particular, to a data receiving method and a receiver. Background technique
  • Multi-carrier filter bank (FBMC, Filter Bank Based Multicarrier) is orthogonal frequency division multiplexing
  • An alternative transmission scheme (OFDM, Orthogonal Frequency Division Multiplexing), because it does not require a cyclic prefix and has better out-of-band rejection performance, on the one hand, it has better spectral efficiency, on the other hand, it is more flexible in frequency use. .
  • FBMC the generated time domain transmit signal will be tailed due to the action of the filter bank. Although the trailing part is less energetic, the information it contains is also part of the transmitted information.
  • FBMC receivers It is also necessary to receive all useful information in a complete and accurate manner.
  • the existing method utilizes the symbol synchronization and the relative position of the synchronization sequence in the frame structure to obtain the beginning and ending position of the receiving window, and then the receiver receives the signal according to the beginning and ending position of the receiving window.
  • the current signal can be utilized.
  • the embodiment of the invention provides a data receiving method and a receiver, which can accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, thereby accurately and completely receiving the signal, so that the demodulation and translation are not performed.
  • the performance of the code has an impact.
  • the step of determining a length of a front smear and a length of a trailing smear of the frame includes:
  • the determining the length of the front smear and the length of the trailing smear of the frame includes:
  • a length of the front smear of the frame and a length of the trailing smear are determined according to the filter parameters.
  • the step of acquiring the filter parameter further includes:
  • the determining the length of the front smear and the length of the trailing smear of the frame includes:
  • the trailing truncation length includes: a front trailing truncation length and a trailing trailing truncation length.
  • the determining, according to the filter parameter and the trailing truncation length include:
  • the acquiring the filter includes: Receiving information of the filter parameters and/or information of the trailing truncation length transmitted by the transmitter.
  • a second aspect of the embodiments of the present invention provides a receiver, where the receiver includes: an acquiring unit, configured to acquire, by timing synchronization, a start time of a main portion of a signal of a frame and an end time of a main portion of the signal;
  • a first determining unit configured to determine a length of a front smear and a length of a trailing smear of the frame
  • a second determining unit configured to: according to a start time of the main part of the signal and an end time of the main part of the signal and The length of the front smear and the length of the trailing smear determine a start time and an end time of a receiving window of the frame;
  • a receiving unit configured to receive the frame between a start time and an end time of the receiving window of the frame.
  • the first determining unit includes:
  • a first receiving module configured to receive pre-tailing length information and post-tailing length information of the frame sent by the transmitter
  • a first determining module configured to determine a length of the front smear and a length of the trailing smear of the frame according to the front smear length information and the trailing smear length information of the frame.
  • the first determining unit includes:
  • a first acquiring module configured to acquire a filter parameter
  • a second determining module configured to determine a length of the front smear and a length of the trailing smear of the frame according to the filter parameter.
  • the first determining unit further includes:
  • the first determining unit includes:
  • a second acquiring module configured to acquire the filter parameter and the trailing truncation length
  • a third determining module configured to determine the frame according to the filter parameter and the trailing truncation length The length of the front trailing tail and the length of the trailing tail;
  • the trailing truncation length includes: a front trailing truncation length and a trailing trailing truncation length.
  • the third determining module includes:
  • a first processing module configured to determine a front trailing length and a trailing trailing length of the frame before the truncation according to the filter parameter
  • a second processing module configured to determine a length of the front tail of the frame and a length of the trailing tail according to the front trailing length and the trailing trailing length and the trailing truncating length before the truncation.
  • the first determining unit Also includes:
  • a third receiving module configured to receive information about the filter parameter and/or the tail truncation length sent by the transmitter.
  • a third aspect of the embodiments of the present invention provides a receiver, where the receiver includes: a processor and a memory for storing a code;
  • the processor executes the code to perform the following process:
  • the end time of the main portion and the length of the front smear and the length of the trailing smear determine a start time and an end time of the reception window of the frame, between the start time and the end time of the reception window of the frame The frame is received.
  • the method includes:
  • the processor is further configured to receive pre-tailing length information and post-tailing length information of the frame sent by the transmitter, and then determine, according to the received pre-tailing length information and the trailing tail length information of the frame.
  • the length of the front smear of the frame and the length of the trailing suffix is further configured to determine, according to the received pre-tailing length information and the trailing tail length information of the frame.
  • the method includes:
  • the processor is further configured to acquire a filter parameter, and then according to the acquired filter parameter The length of the leading tail of the frame and the length of the trailing trail are determined.
  • the method includes:
  • the processor is further configured to receive information of the filter parameter sent by the transmitter.
  • the method includes:
  • the processor is further configured to acquire the filter parameter and the trailing truncation length, and then determine a length of the front trailing end of the frame and a back drag according to the received filter parameter and the trailing truncation length Length of the tail;
  • the trailing truncation length includes: a front trailing truncation length and a trailing trailing truncation length.
  • the method includes:
  • the processor is further configured to determine a front trailing length and a trailing trailing length of the frame before the truncation according to the filter parameter, and then according to the front trailing length and the trailing trailing length and the length before the truncating
  • the trailing truncation length determines the length of the leading tail of the frame and the length of the trailing trailing.
  • the sixth implementation manner of the third aspect of the embodiment of the present invention includes:
  • the processor is further configured to receive information of the filter parameters and/or information of the trailing truncation length sent by the transmitter.
  • the embodiments of the present invention have the following advantages:
  • the receiver obtains the start time of the main part of the signal and the end time of the main part of the signal by timing synchronization, and determines the length of the front tail of the frame and the length of the trailing tail, according to the start time of the main part of the signal.
  • the end time of the main part of the signal and the length of the front smear and the length of the trailing smear determine the start time and the end time of the receiving window of the frame, and receive the frame between the start and end times of the receiving window of the frame, and thus receive
  • the machine can accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, so as to accurately and completely receive the signal, so as not to affect the performance of demodulation and decoding.
  • 1 is a schematic diagram of an embodiment of a data receiving method according to an embodiment of the present invention
  • 2 is a schematic diagram of a frame signal in an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another embodiment of a data receiving method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of a data receiving method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an embodiment of a receiver according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a receiver in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another embodiment of a receiver according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of a first determining unit of the receiver of FIG. 7;
  • FIG. 9 is a schematic diagram of another embodiment of a first determining unit of the receiver in FIG.
  • FIG. 10 is a schematic diagram of an embodiment of a third determining module of the receiver of FIG. 9;
  • FIG. 11 is a schematic diagram of another embodiment of a receiver in an embodiment of the present invention.
  • the embodiment of the invention provides a data receiving method and a receiver, which can accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, thereby accurately and completely receiving the signal, so that the demodulation and translation are not performed.
  • the performance of the code has an impact.
  • an embodiment of a data receiving method in an embodiment of the present invention includes:
  • the method for calculating the start time and the end time of the main part of the signal of the frame by timing synchronization is prior art.
  • the receiver can detect the synchronization through the inserted synchronization channel.
  • the receiver can capture the start time and the end time of the main part of the signal of the frame in which the synchronization channel is located, according to the start time and the end time of the synchronization signal and the relative position of the synchronization signal in the frame structure.
  • the FBMC system in the Frequency Division Duplex (FDD) mode, the two frames overlap each other, the frame The trailing part will be superimposed with the useful signal of the previous frame or the next frame without additional overhead, so there is no need to cut off the trailing, but in the time division duplex (TDDD, Time Division Duplex) mode, the FBMC system When switching between the uplink and the downlink, the trailing portion of the frame cannot be superimposed with other useful signals, and the trailing portion separately occupies a transmission time, resulting in overhead of data transmission.
  • FDD Frequency Division Duplex
  • TDDD Time Division Duplex
  • Truncation smearing is required, so here the receiver determines the length of the leading and trailing tails of the frame in which the sync channel is located in both cases of truncation and post-tailing of the frame and without truncation.
  • a frame has three parts: a main part of the signal, a front tail and a trailing tail.
  • the main part of the signal contains the main energy in the frame.
  • the signal before the main part of the signal is called the front tail, and the signal The signal after the main part is called post-tailing, so the receiver can determine the start time and end of the receiving window of the frame after determining the start time and end time of the main part of the signal and the length of the trailing tail and the length of the trailing tail.
  • the start time of the frame is taken as the start time of the reception window of the frame
  • the end time of the frame is taken as the end time of the reception window of the frame.
  • the structure of a frame signal will be described below. Please refer to FIG. 2.
  • the abscissa in FIG. 2 is the time represented by the sample point, the ordinate is the amplitude, the frame is tailed by the front, and the main part of the signal and the rear drag
  • the start time of the receiving window of the frame is the start time of the complete frame
  • the end of the receiving window of the frame is the end time of the complete frame.
  • the frame The receiving window includes the leading tail of the frame, the main part of the signal and the trailing tail.
  • the starting time of the receiving window of the frame is 0, and the ending time of the receiving window of the frame is 9500.
  • the receiver can receive the frame during the time period between the start time and the end time of the reception window of the frame.
  • the receiver obtains the start time of the main part of the signal and the end time of the main part of the signal by timing synchronization, and determines the length of the front tail of the frame and the length of the trailing tail, according to the start time of the main part of the signal.
  • the end time of the main part of the signal and the length of the front smear and the length of the trailing smear determine the start time and end time of the receiving window of the frame, and receive the frame between the start and end times of the receiving window of the frame, so that the receiver It is possible to accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, thereby accurately and completely receiving the signal, so as not to affect the performance of demodulation and decoding.
  • another embodiment of the data receiving method in the embodiment of the present invention includes:
  • the manner of acquiring the timing synchronization is not limited.
  • the receiver can detect the start time and the end time of the synchronization signal by means of the inserted synchronization channel, and then according to the synchronization signal.
  • the start time and the end time of the frame acquire the start time of the main part of the signal of the frame and the end time of the main part of the signal.
  • the manner of inserting the synchronization channel is not limited.
  • Each of the radio frames is inserted with a corresponding synchronization channel, and the synchronization channel can also be inserted according to a certain rule.
  • the transmitter transmits 5 radio frames, and the transmitter can be first.
  • the radio frame, the third radio frame and the fifth radio frame are inserted into the synchronization channel, and the synchronization channel can also be inserted in the first frame, so that the receiver can obtain the start time of the main part of the signal of the first radio frame and At the end time, since the length of each frame is fixed, the receiver can acquire the start and end times of the main portions of the signals of the other four radio frames.
  • the receiver can receive the pre-tailing length information and the trailing tail length information of the frame transmitted by the transmitter, and determine the length of the leading tail of the frame and the length of the trailing tail.
  • a frame has three parts: a main part of the signal, a front tail and a trailing tail.
  • the main part of the signal contains the main energy in the frame.
  • the signal before the main part of the signal is called the front tail, and the signal The signal after the main part is called post-tailing, so the receiver can determine the start time and end of the receiving window of the frame after determining the start time and end time of the main part of the signal and the length of the trailing tail and the length of the trailing tail.
  • the start time of the frame is taken as the start time of the reception window of the frame
  • the end time of the frame is taken as the end time of the reception window of the frame.
  • the receiver can receive the frame during the time period between the start time and the end time of the reception window of the frame.
  • the receiver acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization, and receives the pre-tailing length information and the trailing length of the frame sent by the transmitter.
  • the information determines the length of the front trailing end of the frame and the length of the trailing tail according to the front trailing length information of the frame and the trailing length information, according to the starting moment of the main part of the signal and the ending moment of the main part of the signal and the trailing tail
  • the length and the length of the trailing tail determine the start time and the end time of the receiving window of the frame, and receive the frame between the start and end times of the receiving window of the frame, so that the receiver can directly acquire from the transmitter without complicated operations.
  • Another embodiment of the data receiving method in the embodiment of the present invention includes:
  • 301 Obtain, by timing synchronization, a start time of a main part of a signal of a frame and an end time of a main part of the signal;
  • timing synchronization is acquired, and then the start time of the main part of the signal of the frame and the end time of the main part of the signal are obtained by timing synchronization.
  • the timing can be obtained by inserting the synchronization channel. Synchronization, for example, sets the Sth in a radio frame. The synchronization sequence is inserted into the symbols, and the receiver can detect the synchronization signal only through the synchronization sequence, and can obtain the timing synchronization according to the synchronization signal, and then the receiver can pass the formula T.
  • No-( S.-l)*M/2 Calculate the start time of the main part of the signal of the frame in units of the number of points and the formula No+( N s - S.)*M/2 to calculate the number of points as the unit frame.
  • the end of the main part of the signal is Ni, where M is the number of subcarriers per symbol, N. Indicates that the synchronization sequence begins to look like this.
  • the manner of inserting the synchronization channel is not limited.
  • Each of the radio frames is inserted with a corresponding synchronization channel, and the synchronization channel can also be inserted according to a certain rule.
  • One frame is inserted into the synchronization channel, for example, the transmitter transmits 5 radio frames, and the first radio frame, the third radio frame, and the fifth radio frame are inserted into the synchronization channel, and the synchronization can also be inserted in the first radio frame.
  • Channel so that the receiver can acquire the main part of the signal of the first radio frame
  • the start time and the end time since the length of each radio frame is fixed, the receiver can acquire the start time and the end time of the main part of the signals of the other four radio frames.
  • the receiver when the receiver determines that the tail of the frame is not truncated, the receiver acquires the filter parameters, and how to obtain the filter parameters is not limited herein. In practical applications, the receiver may receive the filter parameters from the transmitter. The transmitter and the receiver may also agree that a fixed value is stored in the receiver. The present embodiment is described by taking the information of the filter parameters sent by the transmitter as an example.
  • st _ tail wherein, M being the number of sub-carriers per symbol, T s is the sampling interval Bian, K is an overlapping coefficients of the filter as a filter parameter.
  • the receiver when the receiver determines that the tail of the frame is truncated, the receiver first acquires the filter parameters and the trailing truncation length, wherein the trailing truncation length includes the pre-tail truncation length and the trailing tail truncation length, and obtains the filtering.
  • the parameters of the parameters and the length of the trailing truncation are not limited.
  • the receiver can receive the information of the filter parameters and/or the tailing truncation length sent by the transmitter.
  • the receiver can also directly obtain the trailing truncation length stored in the receiver.
  • filter parameters wherein the trailing truncation length is stored as a fixed parameter in the receiver, and the filter parameters can be stored by the transmitter and receiver with a fixed value stored in the receiver.
  • the pre-tailing length and the trailing tail length before the truncation of the frame are determined according to the filter parameters, and then according to the pre-tailing length and the trailing tail before the truncation.
  • Length And the trailing truncation length determines the length of the leading tail of the frame and the length of the trailing tail, for example, setting the front trailing truncation length AT pre and the trailing truncation length AT p of the frame.
  • St calculates the length T p of the trailing tail of the frame in units of time.
  • St _ tail or set the front trailing truncation length ⁇ ⁇ and the trailing tail truncation length AN p of the frame.
  • sWail (Kl/2) * M/2-AN p .
  • St calculates the length N p of the trailing tail in units of the number of points.
  • St _ tail where M is the number of subcarriers contained in each symbol, !
  • K is the filter overlap coefficient and is one of the filter parameters.
  • the receiver obtains the start time and the end time of the three components of the frame to determine the start time and the end time of the receive window of the frame.
  • the start time of the frame is used as the receive window of the frame.
  • the end time of the frame is taken as the end time of the reception window of the frame.
  • ⁇ .! and ⁇ are the start time of the main portion of the signal calculated in step 301 and the end time of the main portion of the signal, respectively, T pre _ tail and T p .
  • sWail calculates the end time N 2 of the frame in units of ⁇ sample points, where ⁇ and ⁇ are the start time of the main portion of the signal calculated in step 301 and the end time of the main portion of the signal, respectively, N pre _ tail and N p .
  • St _ tail is the length of the front smear and the length of the trailing smear calculated in step 304 or step 308, respectively;
  • the receiver can receive the frame from the start time until the end time, and then receive the frame accurately and completely.
  • the start time of the main part of the signal of the frame and the end time of the main part of the signal are obtained by timing synchronization, and the length and the trailing tail of the frame are determined in the case that the tail has truncation and no truncation.
  • the length according to the start time of the main part of the signal and the end time of the main part of the signal and the length of the front smear and the length of the trailing smear determine the start time and end time of the receiving window of the frame, at the beginning of the receiving window of the frame and The frame is received between the end times, so that the receiver can accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, thereby accurately and completely receiving the signal, so that the demodulation and decoding are not performed. Performance has an impact.
  • An embodiment of the receiver in the embodiment of the present invention includes:
  • An obtaining unit 401 configured to acquire, by timing synchronization, a start time of a main portion of the signal of the frame and an end time of the main portion of the signal;
  • a first determining unit 402 configured to determine a length of a front smear of the frame and a length of a trailing smear
  • a second determining unit 403 configured to: according to a start time of the main part of the signal and an end time of the main part of the signal and the front smear The length and the length of the trailing tail determine the start time and end time of the receiving window of the frame;
  • the receiving unit 404 is configured to receive the frame between the start time and the end time of the receiving window of the frame.
  • the obtaining unit 401 acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization, and the first determining unit 402 determines the length of the front tail of the frame and the length of the trailing tail, and second.
  • the determining unit 403 determines the start time and the end time of the reception window of the frame according to the start time of the main portion of the signal and the end time of the main portion of the signal and the length of the front smear and the length of the trailing smear, and the receiving unit 404 is at the receiving window of the frame.
  • the frame is received between the start time and the end time, so that the receiver can accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, thereby accurately and completely receiving the signal, thereby not demodulating and
  • the performance of the decoding has an impact.
  • the first determining unit includes: a first receiving module 5021 and a first determining module 5022.
  • the obtaining unit 501 acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization. For example, when the frame is a radio frame, the acquiring unit 501 can detect the start time of the synchronization signal by means of the inserted synchronization channel. And the end time, then, according to the start time and the end time of the synchronization signal, the start time of the main part of the signal of the frame and the end time of the main part of the signal are acquired, and then the start time of the main part of the signal of the frame and the end time of the main part of the signal are transmitted. To the second determining unit 5022.
  • the first receiving module 5021 receives the pre-tailing length information and the trailing tail length information of the frame sent by the transmitter, and sends the information to the first determining module 5022.
  • the first determining module 5022 determines the length of the front smear of the frame and the length of the trailing smear based on the pre-tailing length information and the trailing smear length information of the frame, and then transmits the length to the second determining unit 503.
  • the second determining unit 503 determines the start time and the end time of the reception window of the frame according to the start time of the main portion of the signal and the end time of the main portion of the signal and the length of the front smear and the length of the trailing smear, and then the receiving window of the frame The start time and the end time are transmitted to the receiving unit 504.
  • the receiving unit 504 receives the frame between the start time and the end time of the reception window of the frame.
  • the obtaining unit 501 acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization
  • the first receiving module 5021 receives the pre-tailing length information and the trailing length of the frame sent by the transmitter.
  • the first determining module 5022 determines the length of the front smear of the frame and the length of the trailing smear according to the pre-tailing length information and the trailing smear length information of the frame
  • the second determining unit 503 is based on the start time and the signal of the main part of the signal.
  • the end time of the main part and the length of the front smear and the length of the smear determine the start time and the end time of the reception window of the frame, and the receiving unit 504 receives the frame between the start and end times of the reception window of the frame, so that
  • the first receiving module 5021 and the first determining module 5022 can directly obtain the length of the smear from the transmitter without complicated operations, and can not only accurately and completely receive the main part of the signal of each frame and the trailing and trailing parts, but also simplify.
  • the data interaction mode in the receiver is explained by the interaction between each module and the unit included in the receiver.
  • FIG. 7 including: The obtaining unit 601, the first determining unit 602, the second determining unit 603, and the receiving unit 604.
  • the obtaining unit 601 acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization.
  • the timing synchronization can be acquired by inserting the synchronization channel, and then the start of the main part of the signal of the frame is acquired.
  • the time and the end time of the main part of the signal for example, the Sth in the radio frame.
  • the synchronization sequence is inserted into the symbols, and the acquisition unit 601 can detect the synchronization signal only through the synchronization sequence, and can obtain timing synchronization according to the synchronization signal, and then the receiver can according to the formula.
  • - (S.-l)* M*T s /2 Calculates the start time of the main part of the signal of the frame in which the synchronization channel is located in time, according to the formula M*T s /2 Calculates the end time T ⁇ , T of the main part of the signal of the frame in which the synchronization channel is located in time. To capture the Sth.
  • the start time of the synchronization sequence is inserted into each symbol, M is the number of subcarriers per symbol, Ts is the sampling interval, and N s is the number of symbols contained in the frame where the synchronization channel is located.
  • each of the radio frames is inserted with a synchronization channel corresponding thereto, and the synchronization channel may be inserted according to a certain rule, and the synchronization channel may be inserted only for the first frame.
  • the first determining unit 602 includes: a second receiving module 6021, a first obtaining module 6022, and a second determining module 6023.
  • the second receiving module 6021 receives the information of the filter parameters sent by the transmitter, and sends the information of the filter parameters to the first obtaining module 6022.
  • the first obtaining module 6022 acquires the filter parameters, and sends the acquired filter parameters to the second determining module 6023.
  • T s is the sample interval
  • K is the filter overlap coefficient as one of the filter parameters
  • the second determination module 6023 will calculate the pre-tail length T pre _ of the frame.
  • Swail or N p is sent to the second determining unit 603.
  • the first determining unit 602 includes: a third receiving module 6024, a second obtaining module 6025, and a third determining module 6026;
  • the third determining module 6026 includes: a first processing module 60261 and a second processing module 60262.
  • the third receiving module 6024 receives the information of the filter parameters and/or the tailing truncation length information transmitted by the transmitter, and transmits the information of the filter parameters and/or the information of the trailing truncation length to the second obtaining module 6025.
  • the second acquisition module 6025 obtains the filter parameters and the trailing truncation length, and then sends the filter parameters and the trailing truncation length to the third determining module 6026, and the trailing truncation length or filter parameters may also be stored in the receiver's memory. (not shown), when the second acquisition module 6025 does not receive the filter parameters and/or the trailing truncation length from the third receiving module 6024, the second obtaining module 6025 can directly obtain the memory from the receiver. Filter parameters and/or trailing truncation length.
  • a first processing module 60261 determines the length of the front and rear trailing hangover length before truncation frame according to filter parameters, e.g., the front frame set trailing cutoff length AT pre and post-cut length trailing AT p. St , first calculate the length of the front tail before the truncation and the length of the trailing tail before the truncation according to the formula (Kl/2)*M*T s /2, or according to the formula ( ⁇ -1/2)* ⁇ /2 The length of the front trailing length before the truncation and the length of the trailing trailing tail before the truncation, and then the first processing module 60261 sends the length of the front trailing tail before the truncation and the length of the trailing trailing tail before the truncation to The second processing module 60262.
  • filter parameters e.g., the front frame set trailing cutoff length AT pre and post-cut length trailing AT p. St .
  • the second processing module 60262 determines the length of the front trailing end and the length of the trailing trailing frame according to the front trailing length and the trailing trailing length and the trailing truncation length before the truncation, for example, setting the front trailing truncation length AT of the frame.
  • sWail (Kl/2) * M * T s / 2-AT p .
  • St calculates the length T p of the trailing tail of the frame in units of time.
  • sWail or set the pre-tailing truncation length ⁇ ⁇ and the trailing truncation length AN p of the frame.
  • N pre _ tail ( 1/2) * ⁇ 1/2 - ⁇ ⁇ ⁇ 6 to calculate the length of the front tail of the frame in units of the number of points N pre4ai ⁇ p according to the formula N p .
  • sWail (Kl/2) * M/2-AN p .
  • St calculates the length N p of the trailing tail in units of the number of points.
  • the sWail is sent to the second determining unit 603.
  • the second determining unit 603 determines the start time and the end time of the receiving window of the frame according to the start time of the main part of the signal and the end time of the main part of the signal and the length of the front smear and the length of the trailing smear.
  • the frame is used.
  • the start time is the start time of the reception window of the frame
  • the end time of the frame is the end time of the reception window of the frame.
  • sWail calculates the end time N 2 of the frame in units of the number of points, and the second determining unit 603 transmits the start time and the end time of the reception window of the determined frame to the receiving unit 604.
  • the receiving unit 604 receives the frame between the start time and the end time of the reception window of the frame.
  • the acquiring unit 601 acquires the start time of the main part of the signal of the frame and the end time of the main part of the signal by timing synchronization, and passes the second receiving module 6021 and the first obtaining module 6022 in the case that the tailing is cut off.
  • the second determining module 6023 determines the length of the front smear of the frame and the length of the trailing smear, or, in the case of no truncation, through the third receiving module 6024, the second obtaining module 6025, the first processing module 60261, and the second processing module.
  • the receiving unit 604 receives the frame between the start time and the end time of the frame receiving window, so that the receiver can accurately and completely receive the main part of the signal of each frame and the trailing tail Partly, and thus accurately and completely receive the signal, so as not to affect the performance of demodulation and decoding
  • FIG. 11 Another embodiment of the receiver in the embodiment of the present invention includes:
  • processor 701 and a memory 702 for storing data
  • the processor 701 performs the following process:
  • the timing of the main part of the signal and the end time of the main part of the signal are obtained by timing synchronization, and the length of the front tail of the frame and the length of the trailing tail are determined, according to the start time of the main part of the signal and the end time of the main part of the signal and The length of the front smear and the length of the trailing smear determine the receiving window of the frame At the start time and the end time of the port, the frame is received between the start time and the end time of the reception window of the frame.
  • the processor 701 is further configured to receive the pre-tailing length information and the trailing tail length information of the frame sent by the transmitter, and then according to the pre-tailing length information of the received frame and The trailing length information determines the length of the leading tail of the frame and the length of the trailing trailing.
  • the processor 701 is further configured to perform the following steps: receiving the information of the filter parameters sent by the transmitter;
  • the length of the front tail of the frame and the length of the trailing tail are determined according to the obtained filter parameters
  • the trailing truncation length includes a front trailing truncation length and a trailing trailing truncation length
  • the length of the front tail of the frame and the length of the trailing tail are determined according to the length of the front trailing tail and the length of the trailing tail and the length of the trailing truncation before the truncation.
  • the disclosed apparatus and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • 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, and may be electrical, mechanical or otherwise.

Abstract

本发明实施例公开了一种数据接收方法以及接收机,接收机通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束时刻,确定帧的前拖尾的长度和后拖尾的长度,根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻,在帧的接收窗口的开始和结束时刻之间对帧进行接收,这样接收机就能够准确且完整的接收每个帧的信号主要部分以及前后拖尾部分,进而准确和完整的接收信号,从而不会对解调和译码的性能造成影响。

Description

一种数据接收方法以及接收机
技术领域
本发明涉及通信领域, 尤其涉及一种数据接收方法以及接收机。 背景技术
多载波滤波器组( FBMC, Filter Bank Based Multicarrier )是正交频分复用
( OFDM , Orthogonal Frequency Division Multiplexing ) 的一种替代传输方案 , 由于其不需要循环前缀且具有较好的带外抑制性能,一方面拥有更好的频谱效 率, 另一方面在频语使用上更加灵活。这使得其成为了未来无线通信系统中的 一种候选传输方案。 对于 FBMC来说, 由于滤波器组的作用, 生成的时域发送 信号将产生拖尾,尽管拖尾部分能量较小,但其包含的信息同样是发送信息的 一部分, 对于 FBMC接收机来说, 同样需要完整和准确的将所有有用信息接收 下来。
现有的方法利用符号同步以及同步序列在帧结构中的相对位置来获得接 收窗的始末位置, 然后接收机依据接收窗的始末位置来接收信号, 在 FBMC调 制的信号中, 可以利用这种现有的方法确定信号的主要部分, 但由于 FBMC信 号具有可变长度的前后拖尾,使用现有的方法不能完全确定接收窗的始末位置 以便包含完整的信号主要部分以及前后拖尾部分,使接收机无法准确和完整的 接收 FBMC信号, 造成了部分数据在接收时的丟失或接收错误, 进而会对解调 和译码的性能造成影响。
发明内容
本发明实施例提供了一种数据接收方法以及接收机,能够准确且完整的接 收每个帧的信号主要部分以及前后拖尾部分, 进而准确和完整的接收信号,从 而不会对解调和译码的性能造成影响。
本发明实施例的第一方面提供了一种数据接收方法, 包括:
通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束 时刻;
确定所述帧的前拖尾的长度和后拖尾的长度;
根据所述信号主要部分的开始时刻和所述信号主要部分的结束时刻及所 述前拖尾的长度和所述后拖尾的长度确定所述帧的接收窗口的开始时刻和结 束时刻;
在所述帧的接收窗口的开始时刻和结束时刻之间对所述帧进行接收。 结合本发明实施例的第一方面,在本发明实施例的第一方面的第一种实施 方式中, 所述确定所述帧的前拖尾的长度和后拖尾的长度的步骤包括:
接收发射机发送的所述帧的前拖尾长度信息和后拖尾长度信息; 根据所述帧的前拖尾长度信息和后拖尾长度信息确定所述帧的前拖尾的 长度和后拖尾的长度。
结合本发明实施例的第一方面,在本发明实施例的第一方面的第二种实施 方式中, 所述确定所述帧的前拖尾的长度和后拖尾的长度的步骤包括:
获取滤波器参数;
根据所述滤波器参数确定所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第一方面的第二种实施方式 ,在本发明实施例的第一 方面的第三种实施方式中, 所述获取滤波器参数的步骤之前还包括:
接收所述发射机发送的所述滤波器参数的信息。
结合本发明实施例的第一方面,在本发明实施例的第一方面的第四种实施 方式中, 所述确定所述帧的前拖尾的长度和后拖尾的长度的步骤包括:
获取所述滤波器参数和拖尾截断长度;
根据所述滤波器参数和所述拖尾截断长度确定所述帧的前拖尾的长度和 后拖尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
结合本发明实施例的第一方面的第四种实施方式 ,在本发明实施例的第一 方面的第五种实施方式中,所述根据所述滤波器参数和所述拖尾截断长度确定 所述帧的前拖尾的长度和后拖尾的长度的步骤包括:
根据所述滤波器参数确定所述帧的截断前的前拖尾长度和后拖尾长度; 根据所述截断前的前拖尾长度和后拖尾长度和所述拖尾截断长度确定所 述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第一方面的第四种实施方式,或第一方面的第五实施 方式,在本发明实施例的第一方面的第六种实施方式中, 所述获取所述滤波器 参数和所述拖尾截断长度的步骤之前包括: 接收所述发射机发送的所述滤波器参数的信息和 /或所述拖尾截断长度的 信息。
本发明实施例的第二方面提供了一种接收机, 所述接收机包括: 获取单元,用于通过定时同步获取帧的信号主要部分的开始时刻和信号主 要部分的结束时刻;
第一确定单元, 用于确定所述帧的前拖尾的长度和后拖尾的长度; 第二确定单元,用于根据所述信号主要部分的开始时刻和所述信号主要部 分的结束时刻及所述前拖尾的长度和所述后拖尾的长度确定所述帧的接收窗 口的开始时刻和结束时刻;
接收单元,用于在所述帧的接收窗口的开始时刻和结束时刻之间对所述帧 进行接收。
结合本发明实施例的第二方面 ,在本发明实施例的第二方面的第一种实施 方式中, 所述第一确定单元包括:
第一接收模块,用于接收发射机发送的所述帧的前拖尾长度信息和后拖尾 长度信息;
第一确定模块,用于根据所述帧的前拖尾长度信息和后拖尾长度信息确定 所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第二方面 ,在本发明实施例的第二方面的第二种实施 方式中, 所述第一确定单元包括:
第一获取模块, 用于获取滤波器参数;
第二确定模块,用于根据所述滤波器参数确定所述帧的前拖尾的长度和后 拖尾的长度。
结合本发明实施例的第二方面的第二种实施方式 ,在本发明实施例的第二 方面的第三种实施方式中, 所述第一确定单元还包括:
第二接收模块, 用于接收所述发射机发送的所述滤波器参数的信息。 结合本发明实施例的第二方面 ,在本发明实施例的第二方面的第四种实施 方式中, 所述第一确定单元包括:
第二获取模块, 用于获取所述滤波器参数和拖尾截断长度;
第三确定模块,用于根据所述滤波器参数和所述拖尾截断长度确定所述帧 的前拖尾的长度和后拖尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
结合本发明实施例的第二方面的第四种实施方式 ,在本发明实施例的第二 方面的第五种实施方式中, 所述第三确定模块包括:
第一处理模块,用于根据所述滤波器参数确定所述帧的截断前的前拖尾长 度和后拖尾长度;
第二处理模块,用于根据所述截断前的前拖尾长度和后拖尾长度和所述拖 尾截断长度确定所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第二方面的第四种实施方式,或第二方面的第五种实 施方式,在本发明实施例的第二方面的第六种实施方式中, 所述第一确定单元 还包括:
第三接收模块, 用于接收所述发射机发送的所述滤波器参数和 /或所述拖 尾截断长度的信息。
本发明实施例的第三方面提供了一种接收机, 所述接收机包括: 处理器以及用于存储代码的存储器;
所述处理器执行所述代码进行如下流程:
通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束 时刻,确定所述帧的前拖尾的长度和后拖尾的长度,根据所述信号主要部分的 开始时刻和所述信号主要部分的结束时刻及所述前拖尾的长度和所述后拖尾 的长度确定所述帧的接收窗口的开始时刻和结束时刻,在所述帧的接收窗口的 开始时刻和结束时刻之间对所述帧进行接收。
结合本发明实施例的第三方面,在本发明实施例的第三方面的第一种实施 方式中, 包括:
所述处理器,还用于接收发射机发送的所述帧的前拖尾长度信息和后拖尾 长度信息,然后根据接收到的所述帧的前拖尾长度信息和后拖尾长度信息确定 所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第三方面,在本发明实施例的第三方面的第二种实施 方式中, 包括:
所述处理器,还用于获取滤波器参数, 然后根据获取到的所述滤波器参数 确定所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第三方面的第二种实施方式 ,在本发明实施例的第三 方面的第三种实施方式中, 包括:
所述处理器, 还用于接收所述发射机发送的所述滤波器参数的信息。 结合本发明实施例的第三方面,在本发明实施例的第三方面的第四种实施 方式中, 包括:
所述处理器,还用于获取所述滤波器参数和拖尾截断长度, 然后根据接收 到的所述滤波器参数和所述拖尾截断长度确定所述帧的前拖尾的长度和后拖 尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
结合本发明实施例的第三方面的第四种实施方式 ,在本发明实施例的第三 方面的第五种实施方式中, 包括:
所述处理器,还用于根据所述滤波器参数确定所述帧的截断前的前拖尾长 度和后拖尾长度,然后根据所述截断前的前拖尾长度和后拖尾长度和所述拖尾 截断长度确定所述帧的前拖尾的长度和后拖尾的长度。
结合本发明实施例的第三方面的第四种实施方式,或第三方面的第五种实 施方式, 在本发明实施例的第三方面的第六种实施方式中, 包括:
所述处理器, 还用于接收所述发射机发送的所述滤波器参数的信息和 /或 所述拖尾截断长度的信息。
从以上技术方案可以看出, 本发明实施例具有以下优点:
本发明实施例中,接收机通过定时同步获取帧的信号主要部分的开始时刻 和信号主要部分的结束时刻,确定帧的前拖尾的长度和后拖尾的长度,根据信 号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾的长度和后拖尾 的长度确定帧的接收窗口的开始时刻和结束时刻,在帧的接收窗口的开始和结 束时刻之间对帧进行接收,这样接收机就能够准确且完整的接收每个帧的信号 主要部分以及前后拖尾部分, 进而准确和完整的接收信号,从而不会对解调和 译码的性能造成影响。
附图说明
图 1为本发明实施例中数据接收方法一个实施例示意图; 图 2为本发明实施例中一帧信号的示意图;
图 3为本发明实施例中数据接收方法另一实施例示意图;
图 4为本发明实施例中数据接收方法另一实施例示意图;
图 5为本发明实施例中接收机一个实施例示意图;
图 6为本发明实施例中接收机另一个实施例示意图;
图 7为本发明实施例中接收机另一个实施例示意图;
图 8为图 7中接收机的第一确定单元一个实施例示意图;
图 9为图 Ί中接收机的第一确定单元另一实施例示意图;
图 10为图 9中接收机的第三确定模块一个实施例示意图;
图 1 1为本发明实施例中接收机另一个实施例示意图。
具体实施方式
本发明实施例提供了一种数据接收方法以及接收机,能够准确且完整的接 收每个帧的信号主要部分以及前后拖尾部分, 进而准确和完整的接收信号,从 而不会对解调和译码的性能造成影响。
请参照图 1 , 本发明实施例中数据接收方法一个实施例包括:
101、 通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的 结束时刻;
本实施例中,通过定时同步获取帧的信号主要部分的开始时刻和结束时刻 的计算方法为现有技术, 在实际应用中, 帧为无线帧时, 接收机可以通过插入 的同步信道检测到同步信号的开始时刻及结束时刻,这样接收机根据同步信号 的开始时刻和结束时刻及同步信号在帧结构内的相对位置就可以捕捉到同步 信道所在的帧的信号主要部分的开始时刻及结束时刻。
102、 确定帧的前拖尾的长度和后拖尾的长度;
本实施例中, 帧的拖尾会出现截断和非截断两种情况, 例如, 在频分双工 ( FDD, Frequency Division Duplex )模式下的 FBMC系统, 前后两个帧相互交 叠在一起, 帧的拖尾部分会和前一个帧或后一个帧的有用信号叠加, 不会造成 额外的开销 ,所以无需截断拖尾,但是在时分双工( TDD, Time Division Duplex ) 模式下的 FBMC 系统且在上下行之间相互切换时, 帧的拖尾部分不能和其他 有用信号进行叠加,该拖尾部分单独占据一段传输时间,造成数据传输的开销, 需要釆用截断拖尾,所以这里接收机在帧的前拖尾和后拖尾的截断和没有截断 的两种情况下, 确定同步信道所在帧的前拖尾和后拖尾的长度。
103、 根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾 的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻;
本实施例中, 一个帧有三部分组成: 信号主要部分、 前拖尾和后拖尾, 信 号主要部分包含了帧中的主要能量,一般地,信号主要部分之前的信号称为前 拖尾,信号主要部分之后的信号称为后拖尾, 所以接收机在确定信号主要部分 的开始时刻和结束时刻及前拖尾的长度和后拖尾的长度之后,可以确定帧的接 收窗口的开始时刻和结束时刻,在实际应用中,将帧的开始时刻作为该帧的接 收窗口的开始时刻, 将该帧的结束时刻作为该帧的接收窗口的结束时刻。
下面对一帧信号的结构进行说明, 请参照图 2, 该图 2中的横坐标为以釆 样点表示的时间, 纵坐标为幅度, 该帧由前拖尾, 信号主要部分及后拖尾三部 分组成, 在现有技术中, 帧的接收窗口的开始时刻为完整的帧的开始时刻, 帧 的接收窗口的结束时候为完整的帧的结束时刻, 本实施例的图 2中, 帧的接收 窗口包含该帧的前拖尾, 信号主要部分及后拖尾, 其中, 该帧的接收窗口的开 始时刻为 0 , 该帧的接收窗口的结束时刻为 9500。
104、 在帧的接收窗口的开始时刻和结束时刻之间对帧进行接收。
本实施例中,接收机可以在帧的接收窗口的开始时刻和结束时刻之间的时 间段对帧进行接收。
本实施例中,接收机通过定时同步获取帧的信号主要部分的开始时刻和信 号主要部分的结束时刻,确定帧的前拖尾的长度和后拖尾的长度,根据信号主 要部分的开始时刻和信号主要部分的结束时刻及前拖尾的长度和后拖尾的长 度确定帧的接收窗口的开始时刻和结束时刻,在帧的接收窗口的开始和结束时 刻之间对帧进行接收,这样接收机就能够准确且完整的接收每个帧的信号主要 部分以及前后拖尾部分, 进而准确和完整的接收信号,从而不会对解调和译码 的性能造成影响。
为便于理解,下面以一具体实例对本发明实施例中的数据接收方法进行描 述, 请参阅图 3 , 本发明实施例中数据接收方法另一实施例包括:
201、 通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的 结束时刻;
本实施例中, 获取定时同步的方式不做限定, 在实际应用中, 帧为无线帧 时,接收机可以通过插入的同步信道的方式检测到同步信号的开始时刻及结束 时刻, 然后根据同步信号的开始时刻及结束时刻, 获取帧的信号主要部分的开 始时刻和信号主要部分的结束时刻。
这里的插入同步信道的方式不做限定,对每个无线帧都插入与其对应的同 步信道,也可以按照一定的规律插入同步信道,例如,发射机发射 5个无线帧, 发射机可以在第一个无线帧、第三个无线帧和第五个无线帧插入同步信道,还 可以在第一个帧中插入同步信道,这样接收机可以获取到第一个无线帧的信号 主要部分的开始时刻和结束时刻, 由于每个帧的长度都是固定的, 这样接收机 可以获取到其它四个无线帧的信号主要部分的开始时刻和结束时刻。
202、 接收发射机发送的帧的前拖尾长度信息和后拖尾长度信息;
203、 根据帧的前拖尾长度信息和后拖尾长度信息确定帧的前拖尾的长度 和后拖尾的长度;
本实施例中,接收机可以接收到发射机发送的帧的前拖尾长度信息和后拖 尾长度信息, 并确定帧的前拖尾的长度和后拖尾的长度。
204、 根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾 的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻;
本实施例中, 一个帧有三部分组成: 信号主要部分、 前拖尾和后拖尾, 信 号主要部分包含了帧中的主要能量,一般地,信号主要部分之前的信号称为前 拖尾,信号主要部分之后的信号称为后拖尾, 所以接收机在确定信号主要部分 的开始时刻和结束时刻及前拖尾的长度和后拖尾的长度之后,可以确定帧的接 收窗口的开始时刻和结束时刻,在实际应用中,将帧的开始时刻作为该帧的接 收窗口的开始时刻, 将该帧的结束时刻作为该帧的接收窗口的结束时刻。
205、 在帧的接收窗口的开始时刻和结束时刻之间对帧进行接收。
本实施例中,接收机可以在帧的接收窗口的开始时刻和结束时刻之间的时 间段对帧进行接收。
本实施例中,接收机通过定时同步获取帧的信号主要部分的开始时刻和信 号主要部分的结束时刻,接收发射机发送的帧的前拖尾长度信息和后拖尾长度 信息 ,根据帧的前拖尾长度信息和后拖尾长度信息确定帧的前拖尾的长度和后 拖尾的长度,根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖 尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻,在帧的接 收窗口的开始和结束时刻之间对帧进行接收,这样接收机不用通过复杂的运算 可以直接从发射机获取到拖尾的长度,不仅能够准确且完整的接收每个帧的信 号主要部分以及前后拖尾部分而且简化了接收过程,进而准确和完整的接收信 号, 从而不会对解调和译码的性能造成影响。
下面以另一具体实例对本发明实施例中的数据接收方法进行描述,请参阅 图 4, 本发明实施例中数据接收方法另一实施例包括:
301、 通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的 结束时刻;
本实施例中, 获取定时同步, 然后通过定时同步获取帧的信号主要部分的 开始时刻和信号主要部分的结束时刻, 在实际应用中, 帧为无线帧时, 可以通 过插入同步信道的方式获取定时同步, 例如, 设定在一个无线帧中的第 S。个 符号上插入同步序列, 此时接收机只需通过同步序列就可以检测到同步信号, 并依据该同步信号可以获取到定时同步, 然后接收机可以通过公式 T。- ( S。-l)* M*Ts/2算出以时间为单位的同步信道所在的帧的信号主要部分的 开始时刻为 和公式丁尸 T。+( Ns-S。)* M*Ts/2算出以时间为单位的同步信道 所在的帧的信号主要部分的结束时刻为 T\ , TQ为接收机捕捉到第 SQ个符号上 插入同步序列的开始时刻, M为每个符号的子载波数量, Ts 为釆样间隔, Ns 为同步信道所在的帧包含的符号数量, 接收机还可以通过公式
No-( S。-l)*M/2 算出以釆样点数为单位的帧的信号主要部分的开始时刻为 和公式 No+( Ns- S。)*M/2算出釆样点数为单位帧的信号主要部分的结束时 刻为 Ni , 其中 M为每个符号包含的子载波数量, N。表示同步序列开始釆样。
当发射机发送多个无线帧到接收机时,插入同步信道的方式不做限定,对 每个无线帧都插入与其对应的同步信道, 也可以按照一定的规律插入同步信 道, 还可以只对第一个帧插入同步信道, 例如发射机发射 5个无线帧, 并在第 一个无线帧、第三个无线帧和第五个无线帧插入同步信道,还可以在第一个无 线帧中插入同步信道,这样接收机可以获取到第一个无线帧的信号主要部分的 开始时刻和结束时刻, 由于每个无线帧的长度都是固定的, 这样接收机可以获 取到其它四个无线帧的信号主要部分的开始时刻和结束时刻。
302、 接收发射机发送的滤波器参数的信息;
303、 获取滤波器参数;
本实施例中,当接收机确定帧的拖尾没有截断时,接收机获取滤波器参数, 如何获取滤波器参数此处不作限定,在实际应用中,接收机可以从发射机接收 到滤波器参数, 也可以由发射机和接收机商定一个固定的数值存储于接收机 中, 本实施以接收发射机发送的滤波器参数的信息为例进行说明的。
304、 根据滤波器参数确定帧的前拖尾的长度和后拖尾的长度;
在本实施例中, 当接收机确定帧的拖尾没有截断时,根据滤波器参数可以 确定帧的前拖尾的长度和后拖尾的长度, 例如接收机可以根据公式
Figure imgf000011_0001
=(K- l/2)*M*Ts/2算出以时间为单位的前拖尾长度 Tp^tail和后拖尾 长度 TpsWail ,或者根据公式 Npre4ail =NpsWail=(K-l/2)*M/2算出以釆样点数为单位 的帧的前拖尾长度 Npre_tail和后拖尾长度 Npst_tail, 其中, M为每个符号的子载波 数量, Ts为釆样间隔, K是滤波器交叠系数为滤波器参数中的一种。
305、 接收发射机发送的滤波器参数的信息和 /或拖尾截断长度的信息;
306、 获取滤波器参数和拖尾截断长度;
本实施例中, 当接收机确定帧的拖尾有截断时, 首先接收机获取滤波器参 数和拖尾截断长度, 其中拖尾截断长度包括前拖尾截断长度和后拖尾截断长 度, 获取滤波器参数和拖尾截断长度的方式不做限定,接收机可以接收发射机 发送的滤波器参数和 /或拖尾截断长度的信息, 接收机还可以直接获取存储在 接收机内的拖尾截断长度和 /或滤波器参数, 其中, 拖尾截断长度作为固定参 数存储于接收机中,滤波器参数可以由发射机和接收机商定一个固定的数值存 储于接收机。
307、 根据滤波器参数确定帧的截断前的前拖尾长度和后拖尾长度;
308、 根据截断前的前拖尾长度和后拖尾长度和拖尾截断长度确定帧的前 拖尾的长度和后拖尾的长度;
本实施例中, 当接收机确定帧的拖尾有截断时,根据滤波器参数确定帧的 截断前的前拖尾长度和后拖尾长度,再根据截断前的前拖尾长度和后拖尾长度 和拖尾截断长度确定帧的前拖尾的长度和后拖尾的长度, 例如,设定帧的前拖 尾截断长度 ATpre和后拖尾截断长度 ATpst , 首先根据公式 (K-l/2)*M*Ts/2算 出以时间为单位的截断前的前拖尾长度和截断前的后拖尾长度, 或根据公式 (Κ-1/2)*Μ/2 以釆样点数为单位的截断前的前拖尾长度和截断前的后拖尾长 度, 然后根据公式 Tpre-tail =(K-l/2)*M*Ts/2-ATpre算出以时间为单位的帧的前拖 尾的长度 Tpre-tail,并根据公式 Tpst-tail =(K-l/2)*M*Ts/2-ATpst算出以时间为单位 的帧的后拖尾的长度 Tpst_tail, 或者设定帧的前拖尾截断长度 ΔΝρκ和后拖尾截 断长度 ANpst, 根据公式 Np^tail =(K-l/2)*M/2-ANpre算出以釆样点数为单位帧 的前拖尾的长度 Npre4ail和依据公式 NpsWail =(K-l/2)*M/2-ANpst算出以釆样点数 为单位的后拖尾的长度 Npst_tail, 其中 M为每个符号包含的子载波数量, ! 为 釆样间隔, K是滤波器交叠系数, 为滤波器参数中的一种。
309、 根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾 的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻;
本实施例中 ,接收机得到帧的三个组成部分的开始时刻和结束时刻可以确 定帧的接收窗口的开始时刻和结束时刻,在实际应用中,将帧的开始时刻作为 该帧的接收窗口的开始时刻,将该帧的结束时刻作为该帧的接收窗口的结束时 刻, 例如, 接收机可以根据公式 1\2=1>丁^4£111算出以时间为单位的帧的开始 时刻 T\2和根据公式 TfTi+ Tp^taU算出以时间为单位的帧的结束时刻 T2,其中
Τ.!和 Τ\分别为在步骤 301中算出的信号主要部分的开始时刻和信号主要部分 的结束时刻, Tpre_tail和 Tpst_tail分别为在步骤 304或步骤 308算出的前拖尾的长 度和后拖尾的长度, 或者还可以根据公式
Figure imgf000012_0001
Npre4ail算出以釆样点数为单 位帧的开始时刻 2和根据公式 N2=Ni+ NpsWail算出以釆样点数为单位的帧的 结束时刻 N2, 其中 ^^和^分别为在步骤 301中算出的信号主要部分的开始 时刻和信号主要部分的结束时刻, Npre_tail和 Npst_tail分别为在步骤 304或步骤 308算出的前拖尾的长度和后拖尾的长度;
310、 在帧的接收窗口的开始时刻和结束时刻之间对帧进行接收。
本实施例中,接收机在步骤 309中确定帧的接收窗口的开始时刻和结束时 刻之后,接收机可以从开始时刻开始接收该帧直到结束时刻完成接收, 进而准 确且完整的接收到该帧。 本实施例中,通过定时同步获取帧的信号主要部分的开始时刻和信号主要 部分的结束时刻,并在拖尾有截断和没有截断两种情况下确定帧的前拖尾的长 度和后拖尾的长度,根据信号主要部分的开始时刻和信号主要部分的结束时刻 及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时刻,在 帧的接收窗口的开始时刻和结束时刻之间对帧进行接收,这样接收机就能够准 确且完整的接收每个帧的信号主要部分以及前后拖尾部分,进而准确和完整的 接收信号, 从而不会对解调和译码的性能造成影响。
下面对用于执行上述数据接收方法的本发明实施例的接收机进行说明,其 基本逻辑结构参考图 5 , 本发明实施例中接收机一个实施例包括:
获取单元 401、 第一确定单元 402、 第二确定单元 403和接收单元 404; 获取单元 401 , 用于通过定时同步获取帧的信号主要部分的开始时刻和信 号主要部分的结束时刻;
第一确定单元 402, 用于确定帧的前拖尾的长度和后拖尾的长度; 第二确定单元 403 , 用于根据信号主要部分的开始时刻和信号主要部分的 结束时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结 束时刻;
接收单元 404, 用于在帧的接收窗口的开始时刻和结束时刻之间对帧进行 接收。
本实施例中,获取单元 401通过定时同步获取帧的信号主要部分的开始时 刻和信号主要部分的结束时刻,第一确定单元 402确定帧的前拖尾的长度和后 拖尾的长度,第二确定单元 403根据信号主要部分的开始时刻和信号主要部分 的结束时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和 结束时刻,接收单元 404在帧的接收窗口的开始时刻和结束时刻之间对帧进行 接收,这样接收机就能够准确且完整的接收每个帧的信号主要部分以及前后拖 尾部分,进而准确和完整的接收信号,从而不会对解调和译码的性能造成影响。
为了更好的理解上述的实施例, 下面在发射机发送帧的拖尾长度时,接收 机中包括的各个模块及单元间的交互对接收机中的数据交互方式进行说明,请 参阅图 6, 包括:
获取单元 501、 第一确定单元 502、 第二确定单元 503和接收单元 504; 其中第一确定单元包括: 第一接收模块 5021和第一确定模块 5022。
获取单元 501 通过定时同步获取帧的信号主要部分的开始时刻和信号主 要部分的结束时刻, 例如, 在帧为无线帧时, 获取单元 501可以通过插入的同 步信道的方式检测到同步信号的开始时刻及结束时刻,然后根据同步信号的开 始时刻及结束时刻获取到帧的信号主要部分的开始时刻和信号主要部分的结 束时刻,然后将帧的信号主要部分的开始时刻和信号主要部分的结束时刻发送 至第二确定单元 5022。
第一接收模块 5021接收发射机发送的帧的前拖尾长度信息和后拖尾长度 信息, 并发送至第一确定模块 5022。
第一确定模块 5022根据帧的前拖尾长度信息和后拖尾长度信息确定帧的 前拖尾的长度和后拖尾的长度, 然后发送至第二确定单元 503。
第二确定单元 503 根据信号主要部分的开始时刻和信号主要部分的结束 时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时 刻, 然后将帧的接收窗口的开始时刻和结束时刻发送至接收单元 504。
接收单元 504在帧的接收窗口的开始时刻和结束时刻之间对帧进行接收。 本实施例中,获取单元 501通过定时同步获取帧的信号主要部分的开始时 刻和信号主要部分的结束时刻, 第一接收模块 5021接收发射机发送的帧的前 拖尾长度信息和后拖尾长度信息, 第一确定模块 5022根据帧的前拖尾长度信 息和后拖尾长度信息确定帧的前拖尾的长度和后拖尾的长度, 第二确定单元 503 根据信号主要部分的开始时刻和信号主要部分的结束时刻及前拖尾的长 度和拖尾的长度确定帧的接收窗口的开始时刻和结束时刻,接收单元 504在帧 的接收窗口的开始和结束时刻之间对帧进行接收, 这样通过第一接收模块 5021与第一确定模块 5022不用通过复杂的运算可以直接从发射机获取到拖尾 的长度,不仅能够准确且完整的接收每个帧的信号主要部分以及前后拖尾部分 而且简化了接收过程, 进而准确和完整的接收信号,从而不会对解调和译码的 性能造成影响。
下面在接收机没有收到发射机发送的帧的拖尾长度时以接收机中包括的 各个模块及单元间的交互对接收机中的数据交互方式进行说明, 请参阅图 7 包括: 获取单元 601、 第一确定单元 602、 第二确定单元 603和接收单元 604。 获取单元 601 通过定时同步获取帧的信号主要部分的开始时刻和信号主 要部分的结束时刻,在帧为无线帧时, 可以通过插入同步信道的方式获取定时 同步, 然后获取帧的信号主要部分的开始时刻和信号主要部分的结束时刻, 例 如, 设定在无线帧中的第 S。个符号上插入同步序列, 此时获取单元 601只需 通过同步序列就可以检测到同步信号, 并依据该同步信号可以获取到定时同 步, 然后接收机可以根据公式 。- (S。-l)* M*Ts/2算出以时间为单位的同步 信道所在的帧的信号主要部分的开始时刻 ,根据公式
Figure imgf000015_0001
M*Ts/2 算出以时间为单位的同步信道所在的帧的信号主要部分的结束时刻 T\ , T。为 捕捉到第 S。个符号上插入同步序列的开始时刻, M为每个符号的子载波数量, Ts 为釆样间隔, Ns为同步信道所在的帧包含的符号数量, 接收机还可以根据 公式 Ν^= Ν。- ( S。-l)*M/2算出以釆样点数为单位的帧的信号主要部分的开始时 刻 ΝΛ , 根据公式 NfNo+CNs-S^M 算出釆样点数为单位帧的信号主要部分 的结束时刻 ^ , 其中 M为每个符号包含的子载波数量, N。表示同步序列开 始釆样, 然后获取单元 601可以将帧的信号主要部分的开始时刻 和信号主 要部分的结束时刻 发送至第二确定单元 603。
需要说明的是,插入同步信道的方式不做限定,对每个无线帧都插入与其 对应的同步信道,也可以按照一定的规律插入同步信道,还可以只对第一个帧 插入同步信道。
当帧的拖尾没有截断时,请进一步参阅图 8, 包括:第一确定单元 602包括: 第二接收模块 6021、 第一获取模块 6022、 第二确定模块 6023。
第二接收模块 6021接收发射机发送的滤波器参数的信息,并将滤波器参数 的信息发送至第一获取模块 6022。
第一获取模块 6022获取滤波器参数,并将获取到的滤波器参数发送至第二 确定模块 6023。
第二确定模块 6023根据滤波器参数确定帧的前拖尾的长度和后拖尾的长 度,例如,根据公式 Tpre-tail=TpsWail =(K- 1 /2)*M*Ts/2算出以时间为单位的前拖尾 长度 Tpre4aii和后拖尾长度 TpsWail , 或者根据公式 Np^tail =NpsWail=(K-l/2)*M/2算 出以釆样点数为单位的帧的前拖尾长度 Np^tail和后拖尾长度 NpsWail, 其中, M 为每个符号的子载波数量, Ts为釆样间隔, K是滤波器交叠系数为滤波器参数 中的一种,然后第二确定模块 6023将算出的帧的前拖尾长度 Tpre_tail或 Npre_tail和后 拖尾长度 Tpswail或 Npswail发送至第二确定单元 603。
当帧的拖尾有截断时, 请进一步参阅图 9和图 10, 包括: 第一确定单元 602 包括: 第三接收模块 6024、 第二获取模块 6025、 第三确定模块 6026;
第三确定模块 6026包括: 第一处理模块 60261和第二处理模块 60262。
第三接收模块 6024接收发射机发送的滤波器参数的信息和 /或拖尾截断长 度的信息, 并将滤波器参数的信息和 /或拖尾截断长度的信息发送至第二获取 模块 6025。
第二获取模块 6025获取滤波器参数和拖尾截断长度,然后将滤波器参数和 拖尾截断长度发送至第三确定模块 6026 ,当拖尾截断长度或滤波器参数还可以 存储于接收机的存储器(图中未示出)内, 当第二获取模块 6025没有从第三接 收模块 6024接收到滤波器参数和 /或拖尾截断长度时, 第二获取模块 6025可以 直接从接收机的存储器中获取滤波器参数和 /或拖尾截断长度。
第一处理模块 60261根据滤波器参数确定帧的截断前的前拖尾长度和后拖 尾长度, 例如, 设定帧的前拖尾截断长度 ATpre和后拖尾截断长度 ATpst , 首先 根据公式 (K-l/2)*M*Ts/2算出以时间为单位的截断前的前拖尾长度和截断前 的后拖尾长度, 或根据公式 (Κ-1/2)*Μ/2以釆样点数为单位的截断前的前拖尾 长度和截断前的后拖尾长度, 然后第一处理模块 60261将截断前的前拖尾长度 和截断前的后拖尾长度发送至第二处理模块 60262。
第二处理模块 60262根据截断前的前拖尾长度和后拖尾长度和拖尾截断长 度确定帧的前拖尾的长度和后拖尾的长度, 例如, 设定帧的前拖尾截断长度 ATpre和后拖尾截断长度 ATpst ,根据公式 Tpre4ail =( 1/2)*^1*172-八1^算出以时 间 为 单位 的 帧 的 前拖尾 的 长度 Tpre4ail , 并根据公 式 TpsWail =(K-l/2)*M*Ts/2-ATpst算出以时间为单位的帧的后拖尾的长度 TpsWail, 或者设 定帧的前拖尾截断长度 ΔΝρκ和后拖尾截断长度 ANpst , 根据公式 Npre_tail =( 1/2)*^1/2-八^^6算出以釆样点数为单位帧的前拖尾的长度 Npre4ai^p根据公 式 NpsWail =(K-l/2)*M/2-ANpst算出以釆样点数为单位的后拖尾的长度 NpsWail, 其中 M为每个符号包含的子载波数量, Ts为釆样间隔, K是滤波器交叠系数为 滤波器参数中的一种, 将算出的前拖尾长度 Tpre_tail或 Npre_tail和后拖尾长度 Tpst_tail 或 NpsWail发送至第二确定单元 603。
第二确定单元 603 根据信号主要部分的开始时刻和信号主要部分的结束 时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和结束时 刻, 在实际应用中, 将帧的开始时刻作为该帧的接收窗口的开始时刻, 将该帧 的结束时刻作为该帧的接收窗口的结束时刻, 例如, 根据公式丁_2=1> Tpre4ail 算出以时间为单位的帧的开始时刻 T\2和根据公式丁2=1\+ TpsWail算出以时间为 单位的帧的结束时刻 T2,或者还可以根据公式
Figure imgf000017_0001
Npre4all算出以釆样点数 为单位帧的开始时刻 2和根据公式 N2=Ni+ NpsWail算出以釆样点数为单位的 帧的结束时刻 N2, 第二确定单元 603将确定帧的接收窗口的开始时刻和结束 时刻发送至接收单元 604。
接收单元 604在帧的接收窗口的开始时刻和结束时刻之间对帧进行接收。 本实施例中,获取单元 601通过定时同步获取帧的信号主要部分的开始时 刻和信号主要部分的结束时刻, 并在拖尾有截断情况下, 通过第二接收模块 6021、 第一获取模块 6022、 第二确定模块 6023确定帧的前拖尾的长度和后拖 尾的长度, 或者在没有截断情况下, 通过第三接收模块 6024、 第二获取模块 6025、第一处理模块 60261和第二处理模块 60262确定帧的前拖尾的长度和后 拖尾的长度,第二确定单元 603根据信号主要部分的开始时刻和信号主要部分 的结束时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗口的开始时刻和 结束时刻,接收单元 604在帧的接收窗口的开始时刻和结束时刻之间对帧进行 接收,这样接收机能够准确且完整的接收每个帧的信号主要部分以及前后拖尾 部分, 进而准确和完整的接收信号, 从而不会对解调和译码的性能造成影响。
下面对本发明实施例中接收机的进一步说明, 请参阅图 11 , 本发明实施 例中接收机另一实施例包括:
处理器 701以及用于存储数据的存储器 702;
处理器 701执行如下流程:
通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束 时刻,确定帧的前拖尾的长度和后拖尾的长度,根据信号主要部分的开始时刻 和信号主要部分的结束时刻及前拖尾的长度和后拖尾的长度确定帧的接收窗 口的开始时刻和结束时刻,在帧的接收窗口的开始时刻和结束时刻之间对帧进 行接收。
上述处理器 701除了执行上述流程外,该处理器 701还用于接收发射机发 送的帧的前拖尾长度信息和后拖尾长度信息 ,然后根据接收到的帧的前拖尾长 度信息和后拖尾长度信息确定帧的前拖尾的长度和后拖尾的长度。
上述处理器 701除了执行上述流程外,该处理器 701还用于执行下列步骤: 接收发射机发送的滤波器参数的信息;
获取滤波器参数;
当帧的拖尾没有截断时,根据获取到的滤波器参数确定帧的前拖尾的长度 和后拖尾的长度;
当帧的拖尾有截断时, 接收发射机发送的滤波器参数的信息和 /或拖尾截 断长度的信息;
获取滤波器参数和拖尾截断长度,其中拖尾截断长度包括前拖尾截断长度 和后拖尾截断长度;
根据滤波器参数确定帧的截断前的前拖尾长度和后拖尾长度;
根据截断前的前拖尾长度和后拖尾长度和拖尾截断长度确定帧的前拖尾 的长度和后拖尾的长度。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 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, 所述单元的划分, 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。 另一点, 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, 可以是 电性, 机械或其它的形式。
以上所述, 以上实施例仅用以说明本发明的技术方案, 而非对其限制; 尽 管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理 解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分 技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的本质脱 离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求
1、 一种数据接收方法, 其特征在于, 包括:
通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束 时刻;
确定所述帧的前拖尾的长度和后拖尾的长度;
根据所述信号主要部分的开始时刻和所述信号主要部分的结束时刻及所 述前拖尾的长度和所述后拖尾的长度确定所述帧的接收窗口的开始时刻和结 束时刻;
在所述帧的接收窗口的开始时刻和结束时刻之间对所述帧进行接收。
2、 根据权利要求 1所述的方法, 其特征在于, 所述确定所述帧的前拖尾 的长度和后拖尾的长度的步骤包括:
接收发射机发送的所述帧的前拖尾长度信息和后拖尾长度信息; 根据所述帧的前拖尾长度信息和后拖尾长度信息确定所述帧的前拖尾的 长度和后拖尾的长度。
3、 根据权利要求 1所述的方法, 其特征在于, 所述确定所述帧的前拖尾 的长度和后拖尾的长度的步骤包括:
获取滤波器参数;
根据所述滤波器参数确定所述帧的前拖尾的长度和后拖尾的长度。
4、 根据权利要求 3所述的方法, 其特征在于, 所述获取滤波器参数的步 骤之前还包括:
接收所述发射机发送的所述滤波器参数的信息。
5、 根据权利要求 1所述的方法, 其特征在于, 所述确定所述帧的前拖尾 的长度和后拖尾的长度的步骤包括:
获取所述滤波器参数和拖尾截断长度;
根据所述滤波器参数和所述拖尾截断长度确定所述帧的前拖尾的长度和 后拖尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
6、 根据权利要求 5所述的方法, 其特征在于, 所述根据所述滤波器参数 和所述拖尾截断长度确定所述帧的前拖尾的长度和后拖尾的长度的步骤包括: 根据所述滤波器参数确定所述帧的截断前的前拖尾长度和后拖尾长度; 根据所述截断前的前拖尾长度和后拖尾长度和所述拖尾截断长度确定所 述帧的前拖尾的长度和后拖尾的长度。
7、 根据权利要求 5或 6所述的方法, 其特征在于, 所述获取所述滤波器 参数和所述拖尾截断长度的步骤之前包括:
接收所述发射机发送的所述滤波器参数的信息和 /或所述拖尾截断长度的 信息。
8、 一种接收机, 其特征在于, 所述接收机包括:
获取单元,用于通过定时同步获取帧的信号主要部分的开始时刻和信号主 要部分的结束时刻;
第一确定单元, 用于确定所述帧的前拖尾的长度和后拖尾的长度; 第二确定单元,用于根据所述信号主要部分的开始时刻和所述信号主要部 分的结束时刻及所述前拖尾的长度和所述后拖尾的长度确定所述帧的接收窗 口的开始时刻和结束时刻;
接收单元,用于在所述帧的接收窗口的开始时刻和结束时刻之间对所述帧 进行接收。
9、 根据权利要求 8中所述的接收机, 其特征在于, 所述第一确定单元包 括:
第一接收模块,用于接收发射机发送的所述帧的前拖尾长度信息和后拖尾 长度信息;
第一确定模块,用于根据所述帧的前拖尾长度信息和后拖尾长度信息确定 所述帧的前拖尾的长度和后拖尾的长度。
10、根据权利要求 8所述的接收机,其特征在于,所述第一确定单元包括: 第一获取模块, 用于获取滤波器参数;
第二确定模块,用于根据所述滤波器参数确定所述帧的前拖尾的长度和后 拖尾的长度。
11、 根据权利要求 10所述的接收机, 其特征在于, 所述第一确定单元还 包括:
第二接收模块, 用于接收所述发射机发送的所述滤波器参数的信息。
12、根据权利要求 8所述的接收机,其特征在于,所述第一确定单元包括: 第二获取模块, 用于获取所述滤波器参数和拖尾截断长度;
第三确定模块,用于根据所述滤波器参数和所述拖尾截断长度确定所述帧 的前拖尾的长度和后拖尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
13、 根据权利要求 12所述的接收机, 其特征在于, 所述第三确定模块包 括:
第一处理模块,用于根据所述滤波器参数确定所述帧的截断前的前拖尾长 度和后拖尾长度;
第二处理模块,用于根据所述截断前的前拖尾长度和后拖尾长度和所述拖 尾截断长度确定所述帧的前拖尾的长度和后拖尾的长度。
14、 根据权利要求 12或 13所述的接收机, 其特征在于, 所述第一确定单 元还包括:
第三接收模块, 用于接收所述发射机发送的所述滤波器参数和 /或所述拖 尾截断长度的信息。
15、 一种接收机, 其特征在于, 所述接收机包括:
处理器以及用于存储代码的存储器;
所述处理器执行所述代码进行如下流程:
通过定时同步获取帧的信号主要部分的开始时刻和信号主要部分的结束 时刻,确定所述帧的前拖尾的长度和后拖尾的长度,根据所述信号主要部分的 开始时刻和所述信号主要部分的结束时刻及所述前拖尾的长度和所述后拖尾 的长度确定所述帧的接收窗口的开始时刻和结束时刻,在所述帧的接收窗口的 开始时刻和结束时刻之间对所述帧进行接收。
16、 根据权利要求 15所述的接收机, 其特征在于,
所述处理器,还用于接收发射机发送的所述帧的前拖尾长度信息和后拖尾 长度信息,然后根据接收到的所述帧的前拖尾长度信息和后拖尾长度信息确定 所述帧的前拖尾的长度和后拖尾的长度。
17、 根据权利要求 15所述的接收机, 其特征在于,
所述处理器,还用于获取滤波器参数, 然后根据获取到的所述滤波器参数 确定所述帧的前拖尾的长度和后拖尾的长度。
18、 根据权利要求 17所述的接收机, 其特征在于,
所述处理器, 还用于接收所述发射机发送的所述滤波器参数的信息。
19、 根据权利要求 15所述的接收机, 其特征在于,
所述处理器,还用于获取所述滤波器参数和拖尾截断长度, 然后根据接收 到的所述滤波器参数和所述拖尾截断长度确定所述帧的前拖尾的长度和后拖 尾的长度;
其中所述拖尾截断长度包括: 前拖尾截断长度和后拖尾截断长度。
20、 根据权利要求 19所述的接收机, 其特征在于,
所述处理器,还用于根据所述滤波器参数确定所述帧的截断前的前拖尾长 度和后拖尾长度,然后根据所述截断前的前拖尾长度和后拖尾长度和所述拖尾 截断长度确定所述帧的前拖尾的长度和后拖尾的长度。
21、 根据权利要求 19或 20所述的接收机, 其特征在于,
所述处理器, 还用于接收所述发射机发送的所述滤波器参数的信息和 /或 所述拖尾截断长度的信息。
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