Review on Different Methods for Achieving Power Efficient Rake Receiver

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 delays. The rake receiver has been used to reduce multipath fading in wideband code division multiple access (WCDMA) systems to achieve better performance in bit error rate and system throughput. The rake receiver consists of sub components which make the system to be computationally complex and power consuming. The paper proposed a simplified and power efficient system based on sorted QR decomposition (SQRD) which is applicable in WCDMA systems to reduce multipath fading and co-channel interference. The proposed scheme is compared with the conventional approach and compare the efficiency of different schemes.