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A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of spread-spectrum-processing circuits, subtra

A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of spread-spectrum-processing circuits, subtracting circuits, and channel correlators or channel-matched filters. Using a plurality of chip-code signals, the plurality of correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals, respectively. The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals, for spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an i.sup.th chip-code-signal, the subtracting circuits subtracts from the spread-spectrum CDMA signal, each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the i.sup.th channel of the spread-spectrum CDMA signal. The channel correlator or channel-matched filter despreads the subtracted signal.

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[ We claim:] [1.] A multi-channel, interference canceler for code division multiple access (CDMA) telecommunication systems for use in a communication receiver wherein each channel of the multi-channel, interference canceler comprises:a plurality of despreading means, each for despreading a specific

[ We claim:] [1.] A multi-channel, interference canceler for code division multiple access (CDMA) telecommunication systems for use in a communication receiver wherein each channel of the multi-channel, interference canceler comprises:a plurality of despreading means, each for despreading a specific CDMA channel to produce a channel signal;a subtracting means having inputs associated with all but a selected despreading means for outputting an interference reference signal with respect to all despread channels except a selected channel which corresponds to said specific CDMA channel of said selected despreading means; andmeans for integrating and combining the channel signal produced by said selected despreading means with said interference reference signal to produce an interference canceled signal.