Communication method for driving frequency spreading/frequency hopping of direct sequence by adopting information

Abstract

The invention discloses a communication method for driving frequency spreading / frequency hopping of a direct sequence by adopting information. The method comprises the following steps: generation of frequency hopping bit data stream and direct spreading bit data stream at a transmitting end, acquiring a direct sequence frequency spreading signal and a direct sequence frequency spreading / frequency hopping signal, and performing up-conversion treatment and radio-frequency signal transmission; signal receiving and down-conversion radio-frequency treatment at a receiving end, acquiring a despreading, dehopping, and acquiring frequency hopping bit data stream and direct spreading bit data stream and information data input to the transmitting end. Compared with the prior art, in a Rayleigh fading channel, when the bit error rate is 10-3, the background technology needs to be 8.5dB in signal to noise ratio, the communication method disclosed by the invention needs to be 5dB in signal to noise ratio, the signal to ratio gain of the communication method disclosed by the invention is increased by 3.5dB. Therefore, the communication method disclosed by the invention has the characteristics of being high in spectrum effectiveness, high in data transmission capability, low in complexity of a direct sequence frequency spreading / frequency hopping communication system and synchronization requirements of both transmitting and receiving sides, obviously improved in performance of the bit error rate in comparison with the background technology and the like.

Description

Technical field [0001] The present invention belongs to the field of wireless communication technology, and specifically is a communication method that uses partial information data to drive direct sequence spread spectrum / frequency hopping. Background technique [0002] Spread spectrum communication method is a very important anti-jamming communication technology. It has been widely used in civil and military communication systems. Together with optical fiber communication and satellite communication, it is known as the three high-tech communication transmissions that have entered the information age. the way. Spread spectrum is generally referred to as spread spectrum for short. 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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