Communication Method Using Information-Driven Direct Sequence Spread Spectrum/Frequency Hopping

Abstract

The invention belongs to the direct sequence spread spectrum / frequency hopping communication method in the field of wireless communication technology, including: generating a frequency hopping bit data stream and a direct spread bit data stream at the transmitting end, obtaining a direct sequence spread spectrum signal, and obtaining a direct sequence spread spectrum / frequency hopping Frequency signal, up-conversion processing and radio frequency signal transmission; signal reception and down-conversion radio frequency processing at the receiving end, despreading signal acquisition, de-hopping, acquisition of frequency hopping bit data stream and direct expansion bit data stream, and acquisition of information data input to the transmitter; Compared with the background technology, under the Rayleigh fading channel, when the bit error rate is 10-3, the signal-to-noise ratio required by the background technology is about 8.5dB, and the required signal-to-noise ratio of the invention is about 5dB, and the signal-to-noise ratio of the invention The gain is increased by about 3.5dB. Therefore, the invention has the characteristics of high spectral efficiency, strong data transmission capability, synchronization requirements for both receiving and transmitting parties, low complexity of the direct sequence spread spectrum / frequency hopping communication system, and significantly improved bit error rate performance compared with the background technology.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a communication method using partial information data to drive direct sequence spread spectrum / frequency hopping. Background technique [0002] The spread spectrum communication method is a very important anti-jamming communication technology, which has been widely used in civil and military communication systems. It, together with optical fiber communication and satellite communication, is known as the three high-tech communication transmissions entering the information age. Way. Spread spectrum is generally referred to simply as spread spectrum, and spread spectrum refers to a communication method in which the bandwidth used to transmit signals is much larger than the bandwidth required by the information itself. [0003] Spread spectrum communication technology can be divided into types according to technology: direct sequence (DS) spread spectrum, ...

AI Technical Summary

Problems solved by technology

[0020] 1. Strict synchronization requirements: the receiving and transmitting parties must maintain precise frequency synchronization, that is, the receiver and the transmitter must use the same frequency hopping frequency at the same time, which is the premise for correct reception of direct sequence spread spectrum / frequency hopping signals Conditions, this synchronization requirement directly leads to the complexity of the traditional direct sequence spread spectrum / frequency hopping communication system, the difficulty of design and the impact on system performance;

[0021] 2. Low spectral efficiency: Traditional direct sequence spread spectrum / frequency hopping communication systems require a large bandwidth (MHz level), and the bandwidth is proportional to the frequency hopping rate and the number of available channels, so the spectral efficiency is very low

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