Demodulation method for bipolar chaos shift keying communication system
The technology of a communication system and a demodulation method is applied in the field of demodulation of bipolar chaotic keying communication system, which can solve the problem of high bit error rate of coherent demodulation and achieve the effect of solving high bit error rate
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[0023] The present invention is a new demodulation method of a bipolar chaotic keying communication system, which comprises the following steps:
[0024] Step 1: The demodulation end uses two different chaotic signal trackers to track the chaotic signal sent by the sender respectively. The tracking dynamic equation used by the chaotic signal tracker 1 is consistent with that of the sender. The chaotic signal tracker 2 is composed of an inverter and a chaotic signal Tracker 1 cascade composition. The tracking algorithms used by the chaotic tracker include EKF and particle filter algorithms. It can be seen that when the digital signal "1" is sent, the chaotic signal tracker 1 has a good performance in tracking the chaotic base signal sent by the sending end, but the chaotic signal tracker 2 cannot track it; when the digital signal "-1" is sent, the chaotic signal tracker Tracker 2 has good tracking characteristics, but chaotic signal tracker 1 cannot track.
[0025] Step 2: Ca...
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