29-09-2022 дата публикации
Номер: US20220308249A1
A method and system for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal including: constructing two or more basic unit signals, according to an exploration requirement, that are stairstep signals obtained by superposing in-phase periodic square wave signals, a frequency ratio between adjacent periodic square wave signals is 2, and the two or more basic unit signals meet the following requirement: if a lowest dominant frequency in a first basic unit signal is a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2times the fundamental frequency, where l is an odd number except 1, and m is a natural number; and superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2sequence pseudo-random signal. A logarithmic non-uniform 2sequence stairstep signal is constructed within a limited frequency interval, and requirements of prospectors for a higher frequency density within a specific frequency interval are met. 1. A method for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal , the method comprising:constructing two or more basic unit signals according to an exploration requirement, wherein{'sup': 'm', 'the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2, and the two or more basic unit signals meet the following requirements: if a lowest frequency of dominant frequencies in a first basic unit signal is denoted as a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2times the fundamental frequency, and the lowest frequencies of the basic unit signals differ from each other, wherein l is an odd number except 1, and m is a natural number; and'}{'sup': 'n', 'superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2sequence ...
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