2010•Unpublished venueRequires access

A Multiuser Receiver for CDMA Systems with Parity Bit Selected Spreading Sequences

Alireza Mirzaee, Claude D’Amours

Abstract

In this paper we propose a multiuser receiver using multistage detection and interference cancellation for direct-sequence code-division multiple-access (DS/CDMA) systems with parity bit selected spreading sequences in synchronous channels. In a CDMA system with parity bit selected spreading sequences (CDMA/PB), the spreading code used by each user depends on the transmitted data bits and it is selected from a set of mutually orthogonal spreading waveforms allocated to each user. Multistage parallel interference cancellation (PIC) detector is used to estimate and subtract out all multiple-access interference (MAI) for each user in parallel. The performance of the proposed system is compared with the conventional uncoded CDMA systems.

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Key concepts: Code division multiple access, Multiuser detection, Computer science, Single antenna interference cancellation, Spread spectrum, Parity bit, Detector, Interference (communication)