Ultra-wideband hopping spread signal rapid capturing method
An ultra-wideband, signal technology, applied in the field of fast capture of ultra-wideband jump-spread signals, can solve the problems of long time and low capture precision, and achieve the effect of fast capture speed and high capture precision
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[0056] A method for fast acquisition of an ultra-wideband hop-spread signal, the realization of which includes the following processes:
[0057] (a) Divide the time uncertainty range into several search units, and the search interval is T h "(single-hop period at the channel's maximum Doppler frequency), that is, the single-hop interval slides.
[0058] (b) Sampling block. Under the code Doppler search, according to the current code Doppler frequency, the cumulative step of counting NCO is calculated to realize half-chip counting and hop counting, and then block the input samples to generate local frequency hopping of the corresponding length frequency etc.
[0059] (c) Frequency Hopping Carrier Stripping. The de-hopping adopts dual-channel down-converter to de-hop alternately. The down-converter is divided into two parts, A and B. A is responsible for de-hopping of frequency hopping bands counted as odd, and B is responsible for even numbers. Each frequency hopping frequen...
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