Performance of Variable-Power Adaptive Modulation With Space-Time Coding and Imperfect CSI in MIMO Systems

The performance analysis of multi-input-multi-output (MIMO) systems with M-ary quadrature amplitude modulation (MQAM) and a space-time block code (STBC) over flat Rayleigh fading channels for imperfect channel state information (CSI) is presented. In this paper, the optimum fading gain switching thr...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:IEEE transactions on vehicular technology Ročník 58; číslo 4; s. 2115 - 2120
Hlavní autori: Xiangbin Yu, Xiangbin Yu, Shu-Hung Leung, Shu-Hung Leung, Wai Ho Mow, Wai Ho Mow, Wai-Ki Wong, Wai-Ki Wong
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.05.2009
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Adaptive modulation (AM)
Bit error rate
Block codes
Channel state information
Channels
Fading
Gain
Lagrange multipliers
Lagrangian functions
MIMO
Modulation
Modulation coding
multi-input-multi-output (MIMO) system
Optimization
Performance analysis
Quadrature amplitude modulation
Rayleigh channels
space-time coding
spectrum efficiency (SE)
variable power (VP)
ISSN:0018-9545, 1939-9359
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:The performance analysis of multi-input-multi-output (MIMO) systems with M-ary quadrature amplitude modulation (MQAM) and a space-time block code (STBC) over flat Rayleigh fading channels for imperfect channel state information (CSI) is presented. In this paper, the optimum fading gain switching thresholds for attaining maximum spectrum efficiency (SE) subject to a target bit-error rate (BER) and an average power constraint are derived. It is shown that the Lagrange multiplier in the constrained SE optimization does exist and is unique for imperfect CSI and for single-input-single-output (SISO) systems under perfect CSI. On the other hand, the Lagrange multiplier will be unique if the existence condition for MIMO under perfect CSI is satisfied. Numerical evaluation shows that the variable-power (VP) adaptive modulation (AM) with STBC provides better SE than its constant-power (CP) counterpart.
Bibliografia:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
content type line 23
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.2002543