I-q channel adaptive line enhancer

Details I-q channel adaptive line enhancer I-q channel adaptive line enhancer

H - Electricity

03

H

328/0.6

H03H 21/00 (2006.01) H04B 3/06 (2006.01)

Patent

CA 1285032

ABSTRACT OF THE DISCLOSURE An I-Q channel adaptive line enhancer has bandpass filters with passbands that can be widened to well beyond the band that is actually being processed by the adaptive line enhancer. This eliminates the requirement of filtering one of the sidebands as is required in single channel adaptive line enhancers, in which the sum and difference sidebands are generated on up-conversion. Band limiting is done with lowpass filters, and the local oscillator may be made variable so that any part of the band that is passed by the bandpass filters can be processed by a single I-Q channel adaptive line enhancer. This type of I-Q channel adaptive line enhance can process any one of a large number of possible banks without tunable bandpass filters, or without banks of adaptive line enhancers which have been preset to adjacent sub-bands.

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