WCDMA Systems Investigation with a Combination of Rake Receiver and Sub-Block Antenna Array Processing for Multiuser Detection
Keywords:WCDMA, Adaptive Antenna Array, RAKE Receiver, DRMTA Adaptive Algorithms, Sample-Based NLMS-DRMTA.
This paper presents a new amalgamation of the RAKE receiver with three-fingers, and the Sub-Block-Based Normalized Least Mean Square-Despread-Respread Multi-Target Array (NLMS-DRMTA) algorithm for multiuser detection in Wideband Code Division Multiple Access (WCDMA) systems. The new method uses together temporal diversity and the space diversity, for getting a significant enhancement in Bit Error Rate (BER) performance, As well as reducing unwanted signals and Indirect signals effects. The combination of the rake receiver and the Sub-Block-Based algorithm was compared versus the single antenna CDMA and sample-based NLMS-DRMTA algorithm. This method can equip users more than the number of antenna array elements. Consequently, it is an extra productive strategy for expanding channel limit. Thus, it opens the route to an answer for limiting the impacts of multipath effects and interference from other users, in this manner enhancing the quality of services. Simulation results show that the sub-block algorithm overcomes the others without a rake system in both environments (AWGN or/and multipath fading). But with the rake, this algorithm will suffer from degradation in its BER performance. Also, the sample base algorithm takes advantages performance in the presence of rake receiver.
 N. B. Kanirkar and J. N. Sarvaiya, â€œBER vs. SNR Performance Comparison of DSSSCDMA FPGA Based Hardware with AWGN, Spreading Codes & Code Modulation Techniquesâ€. International Journal of Electronic Engineering Research. ISSN 0975- 6450 Volume 1 Number 2, pp. 155â€“168, 2009.
 Parveen Singla and Jyoti Saxena, â€œEnhanced Capacity Analysis in WCDMA Systemâ€. International Journal of Electronics and Communication Engineering. ISSN 0974-2166 Volume 4, Number 1, pp.69-82, 2011.
 Raed Almusawi, â€œA Novel Approach Employing RAKE Receiver and Sample-Based Despread-Respread Adaptive Beamforming for Multiuser Detection in CDMA Systemsâ€. European Journal of Scientific Research ISSN 1450-216X / 1450-202X Vol. 132 No 4 May, pp.376-387, 2015.
 Tracy L. Fulghum, Douglas A. Cairns and Carmela Cozzo, â€œAdaptive Generalized Rake Reception in DS-CDMA Systemsâ€. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2009.
 Raed Almusawi, â€œA novel low-complexity sub-block NLMS-DRMTA algorithm for blind multi user detection in WCDMA systemâ€. Journal of Theoretical & Applied Information Technology. Jan 2016.
 Azubogu A C O, Idigo V. E. and Onoh G. N., â€œDesign and Performance Evaluation of Combined Adaptive Beamformer and Rake Receiver for WCDMA Uplinkâ€. Proceedings of the World Congress on Engineering and Computer Science, San Francisco USA, Vol II WCECS, 24-26, October 2012.
 Rashid A. Fayadh , F. Malek, Hilal A. Fadhil, â€œEnhancement of a Three Combining Techniques Rake Receiver Using Adaptive Filter of M-Max Partial Update RLS Algorithm for DS-UWB Systemsâ€. Journal of Next Generation Information Technology (JNIT) Volume 5, Number 4, November 2014.
 Shirvani Moghaddam S. and H. Sadeghi, â€œA New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systemsâ€, International Journal of Antennas and Propagation, pp. 1-10, 2011.
 Yung-Fang C. and S.-S.Chi , â€A RAKE Receiver Design for WCDMA FDD Uplink with an RLS-Based Adaptive Beamforming Schemeâ€, IEEE Transactions on Vehicular Technology, vol. 54, pp.508-515, 2005
 Mohannad, A. M., â€œInvestigation of Adaptive Signal Processing Algorithms for Mobile Communication Using Smart Antennasâ€, M.Sc. Thesis, Dept. of Electrical Eng. University of Technology, Baghdad, Iraq, 2013.
 Minoli, D., Advances in satellite communications; London, Wiley, 2015.
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