Short-term burst spread spectrum signal transmitting and receiving method

Abstract

The invention provides a short-term burst spread spectrum signal transmitting and receiving method which comprises the following steps of: 1) enabling unique codes and carrying data to constitute a burst spread spectrum signal frame structure, wherein the unique codes play a role of a leader sequence; and 2) enabling a receiving machine to adopt a burst signal receiving method based on differential operation, and simultaneously and quickly completing burst signal detection, PN (pseudo noise) code acquisition, frequency offset estimation, frame synchronization detection and symbol timing acquisition tasks. In the method provided by the invention, only the unique codes are used in the burst leader sequence, and the all-1 or all-0 sequence is not used, so that the transmission efficiency is improved. Simultaneously, the invention further provides a burst signal receiving method based on the differential operation, which can simultaneously and quickly complete the burst signal detection, PN code acquisition, frequency offset estimation, frame synchronization detection, symbol timing acquisition and other tasks.

Description

technical field [0001] The invention relates to the spread spectrum technology in wireless communication, in particular to a short-time burst spread spectrum signal transmission and reception method. Background technique [0002] Spread spectrum communication technology is widely used in civil and military fields due to its advantages of anti-interference, anti-multipath, good confidentiality, and difficult to intercept. During the communication process of the wireless channel, the channel parameters often show relatively drastic changes over time, so the burst mode is usually used. [0003] The difficulty of burst mode transmission lies in the rapid estimation of synchronization parameters and channel parameters, and the burst signal reception using direct sequence spread spectrum technology makes it more difficult to quickly capture and estimate quickly. The burst transmission mode is to transmit data in units of a single data packet, and the data packet unit can be sent ...

AI Technical Summary

Problems solved by technology

These algorithms either do not use the preamble sequence of the burst frame, or only use the all "1" or all "0" part of the preamble sequence in the burst frame, and do not consider the application of the unique code, the burst signal detection, PN code synchronization It is separated from frame synchronization, which makes the preamble sequence required for the synchronization process longer and reduces transmission efficiency

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