초록 ▼

A direct-sequence CDMA receiver comprises power detectors for receiving a spread spectrum signal for detecting the power levels of user channels. A channel ranking circuit determines the ranks of the power levels. A framing circuit segments the received spread spectrum signal into data blocks and ap

A direct-sequence CDMA receiver comprises power detectors for receiving a spread spectrum signal for detecting the power levels of user channels. A channel ranking circuit determines the ranks of the power levels. A framing circuit segments the received spread spectrum signal into data blocks and appending, to each of the data blocks, a header containing channel numbers identifying the user channels arranged according to the determined power level ranks. A plurality of serial interference cancellation stages are provided, each including interference cancelers arranged in descending order of ranks. Each interference canceller detects one of the channel numbers of the header corresponding to the rank of the interference canceler, and removes one or more interfering signals from an associated user channel by using a despreading code that corresponds to the detected channel number.

대표청구항 ▼

[ What is claimed is:] [1.] A direct-sequence code division multiple access receiver comprising:a plurality of power detectors for receiving a spread spectrum signal from a plurality of user channels, and determining therefrom power levels of the user channels;a channel ranking circuit for determini

[ What is claimed is:] [1.] A direct-sequence code division multiple access receiver comprising:a plurality of power detectors for receiving a spread spectrum signal from a plurality of user channels, and determining therefrom power levels of the user channels;a channel ranking circuit for determining ranks of the power levels;framing means for segmenting the received spread spectrum signal into data blocks and appending, to each of the data blocks, a header containing channel numbers identifying said channels arranged according to said ranks; anda plurality of serial interference cancellation stages, each of the cancellation stages including a plurality of interference cancelers arranged in descending order of ranks, each of said interference cancellers detecting one of said channel numbers of said header corresponding to the rank of the interference canceler, and removing one or more interfering signals from an associated user channel by using a despreading code corresponding to the detected channel number.