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

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, ...

AI Technical Summary

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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