Synchronization method of differential chaos shift keying or frequency-modification differential chaos keying ultra wideband system
A differential chaotic keying, ultra-wideband technology, applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve problems such as non-periodicity, inapplicability, and different waveforms, achieving low computational complexity and reduced implementation complexity. degree, the effect of shortening the time
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] Such as figure 2 Shown is the FM-DCSK UWB system block diagram that the present invention relates to (will figure 1 The removal of the frequency modulator in is the system block diagram of DCSK UWB). The ultra-wideband chaotic signal generator generates an ultra-wideband chaotic signal p(t) with a chaotic pulse width Tw. The signal s(t) transmitted by the transmitter can be expressed as:
[0027] (1)
[0028] Among them, k is the symbol sequence number, T is the symbol period, For the sent data information.
[0029] What the channel model of the present invention adopts is the tapped delay line model of IEEE 802.15.4a, and the impulse of channel
[0030] The response can be expressed as:
[0031] (2)
[0032] Among them, L is the number of resolvable multipath taps, and resp...
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