naa a22 4500 510794963 CHVBK 20180411083333.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11277-012-0655-x doi (NATIONALLICENCE)springer-10.1007/s11277-012-0655-x Reduced Rank Technique for Joint Channel Estimation and Joint Data Detection in TD-SCDMA Systems [Elektronische Daten] [Ali Marzook, A. Ismail, B. Ali, A. Sali, Mohannad Khalaf, S. Khatun] In time division-synchronous code division multiple access systems, the channel estimation for multiple subscribers requires the computation of very complicated algorithms through short training sequences. This situation causes mismodeling of the actual channels and introduces significant errors in the detected data of multiple users. This paper presents a novel channel estimation method with low complexity, which relies on reducing the rank order of the total channel matrix H. We exploit the rank deficient of H to reduce the number of parameters that characterizes this matrix. The adopted reduced rank technique is based on singular value decomposition algorithm. Equations for reduced rank-joint channel estimation (JCE) are derived and compared against traditional full rank-joint channel estimators: least square (LS) or Steiner, enhanced LS, and minimum mean square error algorithms. Simulation results of the normalized mean square error for the above mentioned estimators showed the superiority of reduced rank estimators. Multi-user joint data detectors based linear equalizers are used to suppress inter-symbol interference and mitigate intra-cell multiple access interference. The detectors: zero forcing block linear equalizer and minimum mean square error block linear equalizer algorithms are considered in this paper to recover the data. The results of bit error rate simulation have shown that reduced rank-JCE based detectors have an improvement by 5dB lower than other traditional full rank-JCE based detectors. Springer Science+Business Media, LLC., 2012 Joint channel estimation (JCE) nationallicence Multi-user joint detection (MUJD) nationallicence Reduced rank nationallicence Singular value decomposition (SVD) nationallicence Time division-synchronous code division multiple access (TD-SCDMA systems) nationallicence Marzook Ali Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut Ismail A. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut Ali B. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut Sali A. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut Khalaf Mohannad Computer Engineering Department, Faculty of Engineering, Basrah University, Basra, Iraq aut Khatun S. Faculty of Computer Systems and Software Engineering, Universiti Malaysia Pahang, Kuantan, Malaysia aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1629-1646 0929-6212 69:4<1629 2013 69 11277 https://doi.org/10.1007/s11277-012-0655-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0655-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Marzook Ali Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut NATIONALLICENCE 700 1- Ismail A. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut NATIONALLICENCE 700 1- Ali B. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut NATIONALLICENCE 700 1- Sali A. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia aut NATIONALLICENCE 700 1- Khalaf Mohannad Computer Engineering Department, Faculty of Engineering, Basrah University, Basra, Iraq aut NATIONALLICENCE 700 1- Khatun S. Faculty of Computer Systems and Software Engineering, Universiti Malaysia Pahang, Kuantan, Malaysia aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1629-1646 0929-6212 69:4<1629 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer