Title :
Adaptive hierarchical modulation over correlated MIMO fading channels
Author :
Li, Guangqiu ; Zhang, Zhenyu ; Lu, Zhangjie
Author_Institution :
Sch. of Commun. Eng., Hangzhou Dianzi Univ., Hangzhou
Abstract :
In this paper, an adaptive technique employing hierarchical M-ary quadrature amplitude modulation (M-QAM) constellations with space-time block coding (STBC) is investigated as a link layer solution to the simultaneous voice and different classes of data transmission problem over multiple-input multiple-output (MIMO) fading channels. Closed-form expressions as well as numerical and simulation results for achievable spectral efficiency and average bit error rate (BER) of voice and data transmission over correlated Nakagami-m MIMO fading channels are presented. The results show that the performance of adaptive hierarchical modulation can be improved by combining STBC.
Keywords :
MIMO communication; Nakagami channels; adaptive modulation; block codes; error statistics; quadrature amplitude modulation; space-time codes; Nakagami-m MIMO fading channel; adaptive hierarchical modulation; bit error rate; correlated MIMO fading channel; data transmission; hierarchical M-ary quadrature amplitude modulation; link layer solution; multiple-input multiple-output system; space-time block coding; spectral efficiency; voice transmission; Bit error rate; Block codes; Constellation diagram; Covariance matrix; Data communication; Fading; MIMO; Phase shift keying; Quadrature amplitude modulation; Receiving antennas;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697518
