naa a22 4500 510792820 CHVBK 20180411083325.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0859-0 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0859-0 Multicode Sparse-Sequence CDMA: Approach to Optimum Performance by Linearly Complex WSLAS Detectors [Elektronische Daten] [Yi Sun, Jizhong Xiao] This paper investigates the performance-complexity tradeoff of the wide-sense likelihood ascent search (WSLAS) detectors in large multicode sparse-sequence CDMA. It is illustrated that when each sequence has sparsely only 16 nonzero chips, in a channel load up to 1.05 bits/s/Hz and a broad SNR region, the linearly complex WSLAS detectors can achieve the benchmark optimum BER while the complexity is significantly reduced from 0.5 times bit number to a constant less than 30 additions per bit by the sequence sparsity. The evaluation result of multiuse efficiency also shows that the sparse sequences of 16 nonzero chips can already provide a sufficient degree of freedom. Springer Science+Business Media New York, 2012 Sparsity nationallicence CDMA nationallicence Maximum likelihood nationallicence Large system nationallicence Multicode nationallicence Sun Yi Department of Electrical Engineering, The City College of City University of New York, 10031, New York, NY, USA aut Xiao Jizhong Department of Electrical Engineering, The City College of City University of New York, 10031, New York, NY, USA aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1049-1056 0929-6212 71:2<1049 2013 71 11277 https://doi.org/10.1007/s11277-012-0859-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0859-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sun Yi Department of Electrical Engineering, The City College of City University of New York, 10031, New York, NY, USA aut NATIONALLICENCE 700 1- Xiao Jizhong Department of Electrical Engineering, The City College of City University of New York, 10031, New York, NY, USA aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 1049-1056 0929-6212 71:2<1049 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer