Spread spectrum signal bit synchronization and frame synchronization fused processing method

A spread spectrum signal and fusion processing technology, applied in the field of communication, can solve problems such as detection errors and easy frame loss, achieve the reduction of error symbols, improve the signal-to-noise ratio of demodulation, and achieve simple effects

Active Publication Date: 2018-03-30
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0005] The technical problem of the present invention is: in view of the situation that simultaneous bit synchronization and frame synchronization cannot be satisfied in the prior art, a fusion processing method of bit synchronization and frame synchronization of the spread spectrum signal is proposed, which avoids the statistics of existing histograms and The maximum likelihood method is prone to frame loss and detection errors

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  • Spread spectrum signal bit synchronization and frame synchronization fused processing method
  • Spread spectrum signal bit synchronization and frame synchronization fused processing method
  • Spread spectrum signal bit synchronization and frame synchronization fused processing method

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Embodiment Construction

[0041] A fusion processing method of bit synchronization and frame synchronization of spread spectrum signals, such as figure 1 As shown, the specific steps are as follows:

[0042] (1) The spread spectrum signal to be processed in the digital signal processing channel is divided into N short code periods with time T as the time interval, one symbol contains E short code periods, and the frame header length is Q, which includes Q symbols;

[0043] (2) Starting from the first short code period, continuously integrate E short code periods to obtain the first correlation value A1, and start from the E+1th short code period, continuously integrate E short code periods to obtain the second correlation value Value A2, and so on, every E adjacent short code cycle accumulation corresponds to an integral correlation value AQ, and a total of Q correlation values ​​A1, A2...AQ are obtained, and Q correlation values ​​are demodulated to obtain Q correlation values Symbols S1, S2...SQ;

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Abstract

The invention discloses a spread spectrum signal bit synchronization and frame synchronization fused processing method. For the problem that in the prior art, a frame loss rate is high and a detectionerror rate is high according to a method of carrying out bit synchronization and frame synchronization based on histogram statistic and maximum likelihood method, through adoption of the method of calculating short code period related energy value matched filtering calculation data and outputting a short code period initial position, the problem that the signal bit synchronization and frame synchronization cannot be carried out on a spread spectrum signal at the same time is solved, the method is high in stability and reliability.

Description

technical field [0001] The invention relates to a fusion processing method of bit synchronization and frame synchronization of spread spectrum signals, which belongs to the technical field of communication. Background technique [0002] The message communication receiver project requires simultaneous reception of multiple message communication signals, and the receiver can work under the condition of carrier-to-noise ratio C / N0 34dB Hz, and the signal acquisition and synchronization probability meet the project requirements. The message communication signal format is a short burst mode, and the duration of the signal is variable. The signal consists of a sync header, a service segment and a data segment. The synchronization header is composed of periodic short codes without data modulation, and is used for the receiver to capture signals. The service section is composed of frame header and user identification and other information, and the data section is the communication ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/04H04J3/06H04B1/7073
CPCH04B1/7073H04J3/0608H04L7/042
Inventor 朱向鹏刘涛党超周昀
Owner XIAN INSTITUE OF SPACE RADIO TECH
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