| 摘要 |
An adaptive signal processing system ( 800 ) comprises a plurality of receiving elements ( 802 a-n), a plurality of analogue to digital converters (ADC's) ( 806 a-n) and a digital signal processor ( 808 ). Each of the receiving elements ( 802 a-n) is arranged to receive an incoming signal and has an ADC ( 806 a-n) connected thereto. Each ADC *( 806 a-n) is arranged to convert a first portion of respective incoming signal into a digital form at a sampling rate less than the temporal Nyquist rate of the incoming signal. The signal processing ( 808 ) means is arranged to calculate complex weighting coefficients to be applied to a second portion of the incoming signal using the digitized first portion of the incoming signals. A method of calculating complex weighting coefficients is also described.
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