Research On 2 Dimension Information Transmission Method Based On DSSS

With the continuous development of the communication industry,people are increasingly demanding communication systems.As a communication method with excellent anti-interference performance and confidentiality performance,the spread spectrum system has become the top priority of the research at this stage.Among them,direct sequence spread spectrum system(DSSS),as an important branch of spread spectrum communication,has many advantages and is widely used in the military and civilian fields.However,with the increase of the amount of information transmitted and the improvement of the communication performance requirements,the DSSS has poor security performance,low transmission rate,less spread spectrum pseudo-code sequences,and limited channel bandwidth.It is difficult to meet the requirements in the application field.Therefore,in order to improve data confidentiality and efficient transmission capability,it is of great significance to carry out research on DSSS-based 2-dimensional information transmission methods.Based on the research of traditional DSSS technology,this topic studies the core components of the 2D-DSSS transmission method.At the transmitting end,the overall generation mechanism of the transmission signal is established,and two transmission modes—adaptive transmission mode and efficient transmission mode—are proposed,and the system mapping relationship model,which is constructed to realize the generation of 2D-DSSS signals.At the receiving end,the overall receiving mechanism of the transmission signal is established,and two receiving modes opposite to the transmitting side are proposed-an adaptive receiving mode and an efficient receiving mode.Focus on in-depth research on 2D-DSSS signal receiving method,multi-channel correlation operation and inverse mapping relationship model.And under the MATLAB simulation platform,the simulation analysis is performed on the transmitting end and the receiving end of the 2D-DSSS transmission method respectively to implement 2D-DSSS simulation verification program with information concealed communication function.And theoretical analysis and simulation results show that 2D-DSSS transmission signals have the same time-frequency characteristics as traditional DSSS signals.It is impossible to distinguish between the two from a time-frequency perspective,and 2D-DSSS has higher error performance than traditional DSSS.Used in the case of signal-to-noise ratio,it can realize efficient and hidden data transmission.