A Cognitive Blind Equalization Method for Radar Channel Amplitude and Phase Correction

A phase correction and blind equalization technology, applied in the field of digital array radar, which can solve the problems of complex data transmission links and complex system implementation.
CN106249205BInactive Publication Date: 2018-08-14HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2018-08-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a cognitive blind equalization method for radar channel amplitude and phase correction. The method comprises: a calibration signal is sent to a blind equalizer; an output signal of the blind equalizer is transmitted to a selection switch; a plurality of related parameters of a convergence characteristic of the blind equalizer are monitored and a signal after equalization processing is outputted when the equalization process of the blind equalizer is normal; and when the equalization process of the blind equalizer is abnormal, equalization processing is not carried out and the signal is delayed and then is outputted. The blind equalizer employs several kinds of cognitive technologies for monitoring and whether the blind equalizer is normal is monitored by multiple parameters, thereby guaranteeing reliability of usage of the blind equalizer. According to the invention, closed-loop equalization of a digital array radar in a digital transmitting-receiving assembly is realized and data downloading and equalization coefficient returning are not required. Meanwhile, a cognitive method for a mean square error and weight coefficient vector monitoring is introduced, so that convergence reliability of the constant-modulus blind equalization method is improved and thus reliability of hundreds of radar channel equalizers of the digital array radar can be guaranteed.
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Description

technical field

[0001] The invention belongs to the field of digital array radar, in particular to a cognitive blind equalization method for radar channel amplitude and phase correction. Background technique

[0002] There are inconsistencies in amplitude and phase in multiple channel bands of digital array radar. Even for narrowband systems, conventional channel calibration generally uses single-frequency signals to achieve consistency correction of a certain frequency. However, for other frequency points within a bandwidth of several megabytes, there are still differences in amplitude and phase. The traditional method uses adaptive equalization technology to realize the amplitude and phase correction of all frequency points in the band. However, adaptive equalization technology requires a reference channel. In the implementation process of digital array radar, the reference channel signal and each channel signal need to be transmitted below the array; after the adaptive ...

Claims

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