Title :
Comparison of Two Novel List Sphere Detector Algorithms for MIMO-OFDM Systems
Author :
Myllylä, Markus ; Silvola, Pirkka ; Juntti, Markku ; Cavallaro, Joseph R.
Author_Institution :
Centre for Wireless Commun., Oulu Univ.
Abstract :
In this paper, the complexity and performance of two novel list sphere detector (LSD) algorithms are studied and evaluated in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. The LSDs are based on the K-best and the Schnorr-Euchner enumeration (SEE) algorithms. The required list sizes for LSD algorithms are determined for a 2times2 system with 4-quadrature amplitude modulation (QAM), 16-QAM, and 64-QAM. The complexity of the algorithms is compared by studying the number of visited nodes per received symbol vector by the algorithm in computer simulations. The SEE based LSD algorithm is found to be a less complex and a feasible choice for implementation compared to the K-best based LSD algorithm
Keywords :
MIMO systems; OFDM modulation; quadrature amplitude modulation; signal detection; 16-QAM; 4-quadrature amplitude modulation; 64-QAM; K-best algorithm; MIMO-OFDM systems; Schnorr-Euchner enumeration algorithm; list sphere detector algorithms; multiple-input multiple-output system; orthogonal frequency division multiplexing system; Detectors; Fading; Frequency domain analysis; MIMO; Maximum likelihood detection; OFDM; Quadrature amplitude modulation; Receiving antennas; Transmitting antennas; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254384
