Efficient multichannel filtering for cdma

Details Efficient multichannel filtering for cdma Efficient multichannel filtering for cdma

H - Electricity

03

H

H03H 17/02 (2006.01) H04B 7/216 (2006.01)

Patent

CA 2434522

An efficient, multichannel filter for CDMA modems permits multiple serial, digital bit streams to be filtered by digital signal processing techniques including sample weighting and summing functions. Each individual channel may have custom weighting coefficients or weighting coefficients common for all channels. If the weighting coefficients are by adoption, the same approach may be taken. The multichannel FIR filter is implemented with no multipliers and a reduction. in the number of adders. To increase the speed of operation, the filter structure utilizes look-up tables storing the weighting coefficients. The invention can be embodied either as a field programmable gate array or an application specific integrated circuit, The use of look-up tables saves significant chip resources.

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