METHOD OF MEASUREMENT OF THE HEIGHT AND WITH CONTINUOUS radio altimeter chirp signals using METHOD

摘要

1. A method of radar altimetry includes signal radiation with fixed parameters modulation side surface of the earth receiving reflected signals on N repetition periods, filtering a received signal into a filter matched to the modulation of the probe signal to obtain in each repetition period of the envelope amplitude of the reflected signal with a sampling step corresponding to the resolution of the probing signal, the maximum distance corresponds to the sample number K, characterized in that for each of N periods rep rhenium hypothesize position jump dispersion of the reflected signal amplitude at n delay, hereinafter referred to as the hypothesis n, is calculated for the n hypotheses expectation of the reflected signal power in the range of delays from zero to n-1 and from n to K to obtain the noise variance and signal to noise respectively compute the weighted sum of the logarithms of the noise variance and signal to noise, the first weight minus logarithm of the number is n, the weight of the second logarithm is a negative number (K-n), change the value of n in hypotheses from 0 to K-1 and repeated operator radios associated with the calculation of the weight sum of logarithms of the noise variance and signal to noise are hypothesis n, corresponding to the maximum weighted sum, respectively aircraft height, height measurement is repeated N cycles of modulation periods of the probing signal averaged sequentially received N altitude estimates to obtain itogovoy.2 . Radioaltimeter synchronizer comprises a series-connected transmitter linear frequency modulated (LFM) signal, and a transmitting antenna sequentially connected receiving antenna, maloshumyaschi