“An Implementation of WCDMA Rake Receiver on FPGA using VHDL Used In 3G Wireless Communications”

3G mobile communications is advanced and emerging technology in the field of wireless communication also providing facilities like multimedia accessing, internet services, higher capacity of data rates and multiple services for same connection. The Rake receiver involves descrambling, dispreading, channel estimation and fading cancellation. The main principle behind Rake receiver is that they exploit multipath propagation by receiving the multipath components of the transmitted signal separately and combining their energies. The Rake receiver is used to tackle the problems of time dispersion (echoes) caused by multipath propagation in mobile communication. The above paper provides an introductory background on 3G communication and various objectives of 3G. To solve the above mention problems we have proposed architecture of WCDMA Rake receiver which is implemented in VHDL. The synthesis done by Xillling ISE 9.2i and simulation is done by ModelSim SE 6.3f. Keyword: 3G, multipath propagation, WCDMA, spreading, scrambling, fading cancellation.