DSSS (direct sequence spread spectrum) frequency domain interference detection method
An interference detection, frequency domain technology, applied in electrical components, transmission systems, etc., can solve the problems that automatic classification detection and identification of multiple interference patterns cannot be realized at the same time, limited application range of algorithms, and high computational complexity, so as to ensure correct detection. and recognition, a wide range of applications, and the effect of high correct recognition rate
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[0019] refer to figure 1 , figure 1 It is a principle block diagram of the present invention, and the embodiment is according to figure 1 connect. A direct-sequence spread spectrum (DSSS) signal received in an interference environment is a superposition of communication signals, interfering signals, and noise:
[0020] r(t)=s(t)+j(t)+n(t) (1)
[0021] In the formula: r(t) is the direct sequence spread spectrum signal in the interference environment, s(t) is the digital signal after spreading, in the DSSS system, the transmitted data is multiplied by the pseudo-random sequence, so that the power spectral density of the signal Similar to white noise; j(t) is the interference existing in the channel; n(t) is Gaussian white noise.
[0022] 1. First, the received signal is transformed by N-point FFT through the FFT transformation module 1, and the time domain signal is transformed into the frequency domain to obtain its spectrum information.
[0023] r ...
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