A source signal recovery method and device
A source signal and signal technology, applied in the field of signal processing, can solve problems such as poor source signal quality
Active Publication Date: 2021-02-02
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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[0006] The present application provides a source signal recovery method and device, with the purpose of solving the problem of poor quality of the source signal recovered from the aliased signal with a high degree of overlap in the broadband receiving scene
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[0074] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0075] figure 1 A method for recovering a source signal provided in an embodiment of the present application includes the following steps:
[0076] S101. Acquire an aliasing signal.
[0077] The aliased signal in this step refers to the aliased signal of the source signal to be recovered, and the aliased signal is formed by aliasing together multiple source signals. The aliasing signal in the embodiment of the present application is an aliasing signal received from two channels, w...
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The present application provides a source signal recovery method and device, wherein the method includes: obtaining an underdetermined mixing matrix of an aliased signal, the aliased signal is an aliased signal in the time domain respectively received from two channels, and the underdetermined The target column in the mixing matrix forms a sub-matrix with each non-target column respectively, and the sub-matrix corresponding to the target column is obtained. The target column is any column in the underdetermined mixing matrix. When any column is selected as the target column, The other columns are non-target columns, respectively determine the time-frequency coefficient matrix under each sub-matrix, and the time-frequency coefficient matrix under any sub-matrix represents the time-frequency coefficient of the source signal indicated by the target column under the sub-matrix Matrix, from the time-frequency coefficient matrix under each sub-matrix, determine the time-frequency coefficient matrix with the smallest energy as the best time-frequency coefficient matrix, perform inverse transformation on the best time-frequency coefficient matrix, and recover the source indicated by the target column Signal. The quality of each source signal recovered by the application is improved.
Description
technical field [0001] The present application relates to the field of signal processing, in particular to a method and device for recovering a source signal. Background technique [0002] With the dense distribution of various military and civilian base stations, the widespread use of new electronic equipment, and the continuous expansion and change of the frequency range of base stations, a complex electromagnetic detection environment with interweaving airspace, highly dense time domain, and serious overlap in frequency domain has been formed. . At the same time, with the rapid update of communication and radar systems and the continuous upgrading of reconnaissance equipment, more and more broadband signals have appeared, requiring the reconnaissance bandwidth to be expanded accordingly, resulting in time-frequency aliasing signals (composed of different types) received by the broadband reconnaissance system. The probability of the signal formed by the aliasing of the so...
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IPC IPC(8): H04B1/16
CPCH04B1/1638
Inventor 刘志鹏李立春潘宁张进峰
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU