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An Efficient and Synchronous Parallel Combined Spread Spectrum System Transmitting and Receiving Method

A spread spectrum system, an efficient technology, applied in transmission systems, electrical components, etc., can solve the problems of increasing the complexity of parallel combined spread spectrum systems, interference or duplication, waste, etc., to solve the contradiction between synchronization efficiency and complexity, reduce Complexity, the effect of saving sequence resources

Active Publication Date: 2017-08-04
HARBIN ENG UNIV
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Problems solved by technology

However, the sync header method is more susceptible to false correlations, and such short codes may be intentionally jammed or duplicated
The disadvantage of this method is: the synchronization head sequence is different from the combination sequence, a sequence is wasted, and in the synchronization head detection process, different circuits are required to detect the synchronization head circuit and the combination sequence circuit, which increases the complexity of the parallel combination spread spectrum system Spend

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  • An Efficient and Synchronous Parallel Combined Spread Spectrum System Transmitting and Receiving Method
  • An Efficient and Synchronous Parallel Combined Spread Spectrum System Transmitting and Receiving Method

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Embodiment Construction

[0022] combine figure 1 , the system parameters of a highly efficient synchronous parallel combination spread spectrum system transmission and reception method, select r=3 sequences from M=16 PN code sequences and send them in parallel combination; first define 16 PN codes in the parallel combination spread spectrum communication One sequence in the sequence is the training sequence (assumed to be the first sequence PN1), and PN1 is set as the training sequence; the parallel combination spread spectrum data transmission module selects the transmission sequence from the 15 PN code sequences no longer 3, but Select 2 sequences (not including the training sequence) to send, and then select the training sequence PN1 together for a total of 3 sequences to be superimposed and transmitted.

[0023] combine figure 1 , on the emitter side:

[0024] The framing transmission module sends the training sequence first, and then performs parallel combination spread spectrum data transmissi...

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Abstract

The invention discloses a high-efficiency synchronous parallel combinatory spread spectrum system transmitting and receiving method. The transmitting method comprises a step of transmitting a training sequence and r-1 sequences in a superposition manner; the receiving manner comprises the following steps: I, receiving a signal by an antenna; II, multiplying the received signal by an initial local carrier signal by a training sequence synchronization module; III, performing correlation processing on the received signal and the local training sequence of an initial capture phase by a training sequence correlator output module, comparing a result with a threshold, and forwarding to a step VI if the result is greater than the threshold; adjusting the capture phase of the local training sequence and the local carrier phase if the result is smaller than the threshold value and returning to step II; VI, transmitting the result to parallel combinatory spread spectrum M-1 correlators by the training sequence synchronization module, selecting r-1 sequences, judging whether the r-1 sequences are all greater than the threshold, obtaining the training sequence if the r-1 sequences are smaller than the threshold, and selecting the maximum sequence from the r-1 sequences to perform inverse mapping to restore data if the r-1 sequences are greater than the threshold.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an efficient synchronous parallel combination spread spectrum system transmitting and receiving method which can be used for fast synchronization in a burst parallel combination spread spectrum system. Background technique [0002] Modern communication has increasingly high requirements for communication synchronization. Parallel combined spread spectrum communication is an improved method of soft spread spectrum communication. It is a spread spectrum communication method with high communication efficiency, and inherits the advantages of conventional spread spectrum communication such as anti-jamming and anti-detection. The parallel combined spread spectrum communication method has been well received by scholars at home and abroad, and has been introduced in academic journals by domestic and foreign scholars. Compared with other communication systems, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7075
Inventor 李北明郭黎利孙志国姜晓菲王俊齐书恒
Owner HARBIN ENG UNIV
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