The Chinese University of Hong Kong

Shandong University

Jishan He

Yang Yang

Diquan Li

Jingbo Weng

Shucai Li

Huaifeng Sun

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.

Method and system for generating logarithmic non-uniform pseudo-random electromagnetic exploration signal

A method and system for generating a high-order pseudo-random electromagnetic exploration signal. The method includes: constructing two or more basic unit signals according to an exploration requirement, wherein the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, and a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2; and superposing the two or more basic unit signals to obtain superposed stairstep signals, and correcting amplitudes to be consistent with amplitudes of the periodic square wave signals, to obtain high-order 2sequence pseudo-random signals. The 2sequence stairstep signals of different orders can be constructed within a limited frequency interval.

Method and system for generating high-order pseudo-random electromagnetic exploration signal

Growing community of inventors

Jinan, China

Jishan He