Orthogonalization based adaptive interference suppression for direct-sequence code-division multiple-access systems

Development and Analysis of Adaptive Interference Rejection Techniques for Direct Sequence Code Division Multiple Access Systems

Cooperative diversity aided direct-sequence code-division multiple-access systems

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Designing Equalizers Based on Explicit Channel Models of Direct-sequence Code-division Multiple Access Systems

In this paper, we show how the entire process of transmission and reception in a DS-CDMA system, including the spreading, can be described as a tapped delay line with multiple inputs and a single output. We then demonstrate how this model can be used to design a fractionally spaced decision feedback equalizer with a single input and multiple outputs. In the proposed approach, long codes can be ...

A selective and adaptive interference cancellation scheme for code division multiple access systems

In this paper, a new selective and adaptive parallel interference cancellation technique is presented for code division multiple access systems. The proposed technique performs a parallel interference cancellation in multistage, and the computational complexity is reduced by applying the cancellation to unreliable signals only. The performance of the proposed scheme is investigated through comp...

Near-Far Resistant Propagation Delay Estimators for Asynchronous Direct-Sequence Code Division Multiple Access Systems

This paper considers an asynchronous direct-sequence code division multiple access (DS-CDMA) communication system over an AWGN channel. We are interested in estimating the propagation delay from the diierent users to the receiver. The Cram er-Rao bound for such an estimator is derived and compared with the measured variance of three algorithms. The performance of the classical correlation-based...