Signal processing method and signal processing device
A signal processing and signal technology, applied in the field of signal processing, can solve the problems of non-flat amplitude-frequency characteristics of power amplifier output signals, not satisfying the amplitude-frequency characteristics of signals transmitted by signal source simulators or sound source generators, etc.
Active Publication Date: 2015-06-03
INST OF ACOUSTICS CHINESE ACAD OF SCI
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However, since the amplitude-frequency characteristics of the power amplifier in the signal source simulator or sound source generator are not flat within the required frequency band, if the generated signal is directly sent to the front end of the power amplifier without corresponding processing, it will inevitably cause the output signal amplitude of the power amplifier to The characteristics are not flat within the required frequency band, and do not meet the amplitude-frequency characteristics of the transmitted signal required by the source simulator or sound source generator
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[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will combine Attached picture The present invention is further described in detail, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Such as figure 1 As shown, it is a schematic flow chart of a signal processing method provided by an embodiment of the present invention picture .
[0027] Step S101, receiving a generated signal sent by a signal generator.
[0028] Wherein, the signal generator may specifically be: a signal source simulator or a sound source generator.
[0029] Step S102, extracting amplitude-frequency response functions of the power amplifier...
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The embodiment of the invention discloses a signal processing method and a signal processing device. The signal processing method comprises the following steps: receiving a generated signal sent by a signal generator; extracting an amplitude-frequency response function among different frequency bands of a power amplifier in the signal generator; inversing the amplitude-frequency response function among different frequency bands of the power amplifier in the signal generator and generating an amplitude-frequency response function required by the generated signal; after performing fast Fourier transform on the time domain form of the generated signal, generating a band limited signal; filtering the band limited signal according to the amplitude-frequency response function required by the generated signal, and generating a filtration signal; and performing inverse fast Fourier transform on the filtration signal, so that a time domain form of the filtration signal is generated; performing amplitude correction on the time domain form of the filtration signal according to the signal amplitude needed by the input end of the power amplifier, performing power amplification on the time domain form of the filtration signal subjected to amplitude correction, and generating and outputting a transmitting signal.
Description
technical field [0001] The invention relates to the field of signal processing. Background technique [0002] In the development and application of sonar equipment, the signal source simulator or sound source generator is an indispensable and important part. Due to the diversity of actual sonar radiation signals and the temporal and spatial variability of ocean channels, the requirements for the diversity, accuracy and specificity of the signals emitted by the source simulator or sound source generator are getting higher and higher. One of the key factors in the development of source simulators or sound source generators lies in the design of arbitrary spectrum and spectrum-level signals. Only when accurate signals are generated can various parameter estimations be performed based on the signals (the performance of the sound source generator transmitting signals, receiving Array transmission system amplitude-frequency characteristics, amplitude attenuation characteristics, ...
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IPC IPC(8): G01S7/529
CPCG01S7/52G01S7/52004
Inventor 陈新华李媛鲍习中
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI