Method for realizing multi-band segmentation and aggregation of spread spectrum signal
A spread spectrum signal and aggregation method technology, which is applied to the separation device of the transmission path, the frequency modulation carrier system, the multiple use of the transmission path, etc., can solve the problems of difficult to guarantee the phase recovery performance, DS signal influence, and high phase consistency requirements.
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[0076] Taking the real-frequency ramp-up sawtooth signal as an example, the specific process of realizing the multi-band segmentation and aggregation method of the spread-spectrum signal is described. The method includes the following steps:
[0077] 1) The method of spectrum segmentation:
[0078] First, the processed signal is limited, and the baseband time-domain expression of the LFMCW real-frequency ramp-up sawtooth signal is: l(t)=Ab k cos(πμt 2 ), t∈[0, T s ), A is the signal amplitude, b k is the modulation bit, μ is the frequency modulation slope, T s is the time-domain symbol period, such as figure 1 As shown in (a), the signal time-frequency relationship is:
[0079] f=μt (1)
[0080] In order to improve the anti-interception and anti-identification of LFMCW signal, add pseudo-random scrambling code c(t) modulation: L(t)=Ab k c(t)cos(πμt 2 );
[0081] It is only necessary to segment the LFMCW time domain signal in the time domain, and determine the center f...
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