On Spectral Efficiency of Low-Complexity Adaptive MIMO Systems in Rayleigh Fading Channel

被引：12

作者：

Huang, Jinliang ^{[1
]}

Signell, Svante ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Commun Syst, S-16428 Kista, Sweden

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2009年 / 8卷 / 09期

关键词：

OSTBC; ZF; adaptive modulation; average spectral efficiency;

D O I：

10.1109/TWC.2009.070167

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Adaptive MQAM modulation is used to maximize spectral efficiency of Multiple-Input Multiple-Output (MIMO) systems while keeping bit error rate (BER) under a target level. Closed-form expressions of the average spectral efficiency, coined as discrete-rate spectral efficiency (DRSE), are derived for adaptive modulation MIMO systems using different algorithms. To further enhance the spectral efficiency, a low complexity adaptation scheme is suggested to switch across different algorithms based on the DRSE. In the current letter, we investigate the adaptation scheme that switches between Orthogonal Space-Time Block Codes (OSTBC) and spatial multiplexing with zero-forcing (ZF) detection for MIMO systems with two transmit antennas. Two types of operating environment are considered: flat Rayleigh fading channel without spatial correlation and spatially correlated Rayleigh fading channel with transmit correlation.

引用

页码：4369 / 4374

页数：6

共 18 条

[1]

Alamouti S.M., 1998, IEEE J. Select. Areas Commun, V16

[2] Adaptive modulation over Nakagami fading channels [J].

Alouini, MS ;

Goldsmith, AJ .

WIRELESS PERSONAL COMMUNICATIONS, 2000, 13 (1-2) :119-143

[3] Adaptive modulation and MIMO coding for broadband wireless data networks [J].

Catreux, S ;

Erceg, V ;

Gesbert, D ;

Heath, RW .

IEEE COMMUNICATIONS MAGAZINE, 2002, 40 (06) :108-115

[4]

FORENZA A, 2006, IEEE P VTC MAY

[5] Adaptive Transmitting Antenna Arrays with Feedback [J].

Gerlach, Derek ;

Paulraj, Arogyaswami .

IEEE SIGNAL PROCESSING LETTERS, 1994, 1 (10) :150-152

[6] Variable-rate variable-power MQAM for fading channels [J].

Goldsmith, AJ ;

Chua, SG .

IEEE TRANSACTIONS ON COMMUNICATIONS, 1997, 45 (10) :1218-1230

[7] Transmit selection in spatial multiplexing systems [J].

Gore, DA ;

Heath, RW ;

Paulraj, AJ .

IEEE COMMUNICATIONS LETTERS, 2002, 6 (11) :491-493

[8] Switching between diversity and multiplexing in MIMO systems [J].

Heath, RW ;

Paulraj, AJ .

IEEE TRANSACTIONS ON COMMUNICATIONS, 2005, 53 (06) :962-968

[9]

HUANG JL, 2007, IEEE P WCNC HONG KON

[10]

HUANG JL, 2007, IEEE SARNOFF2007

← 1 2 →