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Performance Analysis of UMM-S/OFDM with Multi-level Modulation in the Rayleigh Fading Channel  

Kim, Nam-Soo (한양대학교 전파통신공학)
Cho, Sung-Ho (한양대학교 정보통신공학)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.1A, 2007 , pp. 51-56 More about this Journal
Abstract
Unitary matrix modulation (UMM) is investigated in multiple antennas system that is called unitary space-time modulation (USTM). When we consider only diagonal components of UMM with splitting over the coherence bandwidth, the system can obtain frequency diversity in a single antenna system. In Rayleigh fading channel, we compared USTM/OFDM with 2Tx-antenna with UMM-S/OFDM with 1Tx-antenna, conventional multi-level OFDM and UMM-S/OFDM with changing bit rate per Hz. Also, we analyzed SNR for between multi-level modulation STBC/OFDM and multi-level modulation UMM-S/OFDM with changing transmission rate. When it was adaptive multi-level modulation to improve SNR, we did the UMM-S/OFDM system performance analysis of N-ary PSK and M-ary QAM.
Keywords
Multilevel; Splitting; UMM; USTM; STBC;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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