Simulation and Efficient Implementation of Low Power Time Diversity Receiver for Mobile Communications

This paper presents a novel and efficient implementation of a CDMA Rake receiver, analysis and simulation of his operation. A Rake structure is used to resolve the time diversity due to the multipath propagation. The focus has been on doing an implementation with small memory footprint and low power consumption and simulation of the realized structure. Also, another aim of this paper was to incorporate a new signal detection technique within the Rake receiver of the Code Division Multiple Access (CDMA) system, which is able to identify every "important" multipath in the unknown channel using the Least Mean Square (LMS) algorithm. By moving the time alignment of the "fingers " (multipath components) from the beginning of a Rake receiver to the end, it is shown that not only will be saved area, but also it is reduced the power consumption. And by using techniques like clock gating, the power consumption and area are reduced even more.