Direct Sequence Spread Spectrum Communications System in a Multipath Fading Channel. Rake Receiver Performance Analysis

The use of direct sequence spread spectrum (DS-SS) baseband modulation in a mobile communication system have proved to bring many advantages. In this paper a study of the DS-SS modulation and its performances in a multipath fading channel is presented, considering different parameters for the system and communication channel. A RAKE receiver is implemented to achieve diversity over the different path arrived at the receiver. The numerical results were obtained using Matlab simulations. The results of the simulations indicate the utility of reconfigurable hardware implementation for the receiver, the diverse functioning conditions imposing diverse configurations.