Title :
A threshold detection method of DSSS signal based on STFT
Author :
Zhao, Zhijin ; Sun, Zheng ; Mei, Fei
Author_Institution :
Hangzhou Dianzi Univ., China
Abstract :
Based on the periodicity of DSSS signal´s short-time Fourier transform (STFT) spectrum, a periodical variance threshold searching method of periodical pulse is presented. To the IS-95CDMA signal, when SNR is -13 dB, its detection probability is above 89%. This method doesn´t use any prior information such as signal´s carrier frequency, spreading code and etc. It is easy to implement and to use in practice.
Keywords :
Fourier transforms; code division multiple access; signal detection; spread spectrum communication; DSSS signal periodicity; IS-95CDMA signal; STFT spectrum; code division multiple access; periodical pulse variance; short-time Fourier transform; threshold detection method; Adaptive filters; Baseband; Communications technology; Fourier transforms; Frequency conversion; Military communication; Multiaccess communication; Signal detection; Spread spectrum communication; Sun; DSSS Detection; Detection without Code; Direct Sequence Spread Spectrum (DSSS) signal; Short-Time Fourier Transform (STFT); Spread Spectrum Communication;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618060
