A mapsk adaptive demodulation system
A demodulation system and self-adaptive technology, applied in the direction of phase modulation carrier system, transmission system, digital transmission system, etc., can solve the problem of point deviation from the optimal point, and achieve the effect of saving resources and high resource reuse rate
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[0028] The adaptive demodulation system and the bit synchronization part of the present invention will be further introduced below in conjunction with the accompanying drawings.
[0029] Such as figure 1 Shown is the composition diagram of the system structure of the present invention, including the lead capture module, bit synchronization module, rectangular coordinate system to polar coordinate system module, initial frequency offset and phase offset estimation module, RM decoding module, adaptive carrier tracking module, gain Control module, adaptive soft demapping module, burst type solving module and frame synchronization module;
[0030] The leading head acquisition module receives and stores the satellite downlink input signal, adopts a burst detection scheme based on multi-channel differential correlation detection, and correlates the satellite downlink input signal with the leading head; if the correlation result is greater than or equal to the capture threshold, a su...
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