A wideband ds/fh signal parameter estimation method and system based on keystone transform
A signal parameter and signal estimation technology, applied in the field of spread spectrum communication, can solve the problems of poor adaptability of signal-to-noise ratio, low frequency resolution, slow convergence speed, etc., and achieve strong adaptability of signal-to-noise ratio, high frequency resolution, The effect of improving accuracy
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[0030] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0031] The principle of the wideband DS / FH signal parameter estimation scheme based on Keystone transform provided by the present invention is as follows: firstly, the delay time estimation value is obtained based on the differential correlation DS / FH signal fast method, and used as the local carrier frequency hopping pattern and The initial delay of the local direct-spread pseudo-code is used to despread the received signal. After the despread signal undergoes Keystone transformation, the residual carrier frequency of each hop is concentrated on a certain frequency point, which realizes the conversion of multi-frequency signals into single-frequency signals, and then uses Fourier transform FFT to realize fast estimation of Doppler frequency, and further Velocity is estimated using Doppler frequency estimates.
[0032] Based on the above principles, an em...
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