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A Power Efficient Rake Receiver for Interference Reduction in the Mobile Communication Systems

I. A. Alimi, J. J. Popoola, and K. F. Akingbade
Department of Electrical and Electronics Engineering, School of Engineering and Engineering Technology, Federal University of Technology, Akure, Nigeria
Abstract—The multipath fading is one of the major problems in wireless communications especially in the mobile communication systems. The effect of multipath fading leads to significant impairment in the received signal by the mobile units. The effect is more severe when the path delays of multipath structures are less than the chip delay. The RAKE receiver has been used to reduce multipath fading in wideband code division multiple access (WCDMA) systems and achieve better performance in terms of bit error rate (BER) and system throughput. Nevertheless, the RAKE receiver consists of sub-components which make the system to be computationally complex and power consuming. In this paper, we proposed a simplified and power efficient system based on Sorted QR decomposition (SQRD) that is applicable in a realistic mobile scenario for base and mobile units of WCDMA systems to reduce multipath fading. The proposed scheme is compared with the conventional approach. The simulation results obtained show that significant performance improvement in both BER and power dissipation when compared with the conventional approach. 
 
Index Terms—wideband code division multiple access (WCDMA), third generation (3G), RAKE receiver, sorted QR decomposition (SQRD), multiuser detection (MUD)

Cite: I. A. Alimi, J. J. Popoola, and K. F. Akingbade, "A Power Efficient Rake Receiver for Interference Reduction in the Mobile Communication Systems," International Journal of Electronics and Electrical Engineering, Vol. 3, No. 6, pp. 501-505, December 2015. doi: 10.12720/ijeee.3.6.501-505
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