Paper Info
Title
Near Maximum-Likelihood Detection with Low Complexity for Collaborative Spatial Multiplexing in Uplink Mobile WiMAX Systems
Abstract
In mobile WiMAX systems, uplink collaborative MIMO (multiple input multiple output) performs spatial multiplexing with two PSSs (portable subscriber stations), each with one antenna. As two PSSs transmit collaboratively on the same sub-channel, the overall uplink capacity will be doubled. To perform this interesting technique with high performance, most system venders demand the optimal MLD (maximum-likelihood detection) in the RAS (radio access station). However, the MLD is difficult to implement due to its explosive computational complexity. In this paper, we propose a two-step MIMO decoding scheme which achieves near ML performance with low complexity for CSM (collaborative spatial multiplexing) in uplink mobile WiMAX systems that having an iterative channel decoder using bit LLR (log-likelihood ratio) information. Simulation results show that the proposed scheme has almost the same BLER (block error rate) performance of the MLD with only about 15.75% computational complexity in terms of real multiplication, when both PSSs transmit with 16 QAM (quadrature amplitude modulation) modulation.
Year
DOI
Venue
2010
10.1109/CCNC.2009.4784792
Las Vegas, NV
Keywords
Field
DocType
mobile wimax system,high performance,multiple input multiple output,wimax,optimal mld,low complexity,overall uplink capacity,near maximum-likelihood detection,qam,log-likelihood ratio,collaborative mimo,ml performance,maximum likelihood detection,portable subscriber stations,block error rate,computational complexity,mobile radio,mimo communication,maximum-likelihood detection,radio access station,quadrature amplitude modulation,collaborative spatial,explosive computational complexity,uplink mobile wimax system,mimo decoding scheme,decoding,uplink mobile wimax systems,collaborative spatial multiplexing,log likelihood ratio,error rate,phase shift keying,spatial multiplexing,indexing terms,mobile communication,mimo,interference cancellation
Mobile radio,Block Error Rate,Quadrature amplitude modulation,Computer science,MIMO,WiMAX,Real-time computing,Spatial multiplexing,Phase-shift keying,Telecommunications link
Conference
ISBN
Citations 
PageRank 
978-1-4244-2309-5
0
0.34
References 
Authors
3
4
Name
Order
Citations
PageRank
Sanhae Kim1103.31
Dongjun Lee285584.67
Oh-Soon Shin362063.13
Yoan Shin436858.41