Hybrid Spread SpectrumlTime Division Multiplex (SS/TDM) is a promising scheme for the air interface of future high-speeci wireless packet-based networks, especially for the downlink. In this thesis, we first present an alternative receiver to the Rake for the downlink of SSITDhl systems. This receiver, which consists of a Fractionally Spaced Chip Equalizcr (FSCE) and a dcsprcadcr, is shown to havc supcrior pcrformancc to thc conventional Rake receiver and can be used in systems with long spreading codes. LVe propose an adaptive implementation of the FSCE receiver and use simulations to study the effect of various system parameters on the performance of the receiver. In addition. for channels wit.h short delay spread in wliich spread spectrum does not provide enough diversity to combat fading, ive combine chip equalization with transmit antenna diversity to achieve botli interference suppression arid robustriess agairist fadirig. We dernoristrate the performance of the conibined scherne iising simulations.
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