Abstract：The conception of simultaneous multiple-source data acquisition was first proposed by Garotta in 1983; however, he only presented encoding and decoding formulas for two simultaneous seismic sources.As a matter of fact, Hadamard transformation can be used to achieve simultaneous multiple-source or multiple-receiver data acquisition. With the use of Hadamard transformation, the data of multiple sources or multiple receivers can be simultaneously recorded in a single channel; then the record can be decoded into single-source or single-receiver data by making inverse Hadamard transformation.
