The Detection, Symbol Period and Chip Width Estimation of DSSS Signals Based on Delay-Multiply, Correlation and Spectrum Analysis

Based on the periodicity that the signals which are gotten by doing delay-multiply with the Direct Sequence Spread Spectral (DSSS) signals, the paper proposes an efficient method for the detection of DSSS signals: the detection, symbol period and chip width estimation of DSSS signals based on delay-multiply, correlation and spectrum analysis. The computer simulations show that it can not only fit the need of the low signal to noise ratio which is quite common in the detection of DSSS signals, but also can give the estimations of the symbol period and chip width in a simple way. Especially, the method proposed in the paper can enhance the precision of the symbol period estimation by increasing the processed sampling data when the sampling rate is fixed, which is very important for the detection of DSSS signals.