DocumentCode :
2656513
Title :
Near-Instantaneously Adaptive Cooperative Uplink Schemes Based on Space-Time Block Codes and V-Blast
Author :
El-Hajjar, Mohammed ; Zummo, Salam ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Southampton Univ.
fYear :
2007
fDate :
22-25 April 2007
Firstpage :
2200
Lastpage :
2204
Abstract :
In this paper we propose two adaptive schemes for improving the achievable bandwidth efficiency (BE) of cooperative diversity aided wireless networks. These schemes are capable of accommodating the channel signal-to-noise ratio (SNR) variation of wireless systems by near-instantaneously adapting the uplink transmission configuration. Explicitly, the first adaptive transmission scheme is constituted by a novel reconfigurable four-antenna-aided cooperative uplink space-time block coded (STBC) structure designed for communicating with a base station (BS) equipped with a single receive antenna. By contrast, the second adaptive scheme is constituted by a reconfigurable cooperative uplink vertical Bell Labs layered space time (V-BLAST)-like architecture constituted by single-antenna-aided mobiles communicating with a BS equipped with multiple receive antennas. Our results demonstrate that significant effective BE improvements can be achieved by both systems, while maintaining a target bit-error-ratio of 10-3. Explicitly, when neglecting the Nyquist excess bandwidth, the first system is capable of attaining an effective BE varying between 0.316 bits/sec/Hz and 2.18 bits/sec/Hz, while the second has a BE varying between 2 bits/sec/Hz and 8 bits/sec/Hz.
Keywords :
antenna arrays; block codes; diversity reception; mobile radio; radio links; receiving antennas; space-time codes; transmitting antennas; Nyquist excess bandwidth; V-BLAST; bit-error-ratio; channel signal-to-noise ratio; cooperative diversity aided wireless networks; multiple receive antennas; near-instantaneously adaptive cooperative uplink schemes; single-antenna-aided mobiles; space-time block codes; vertical Bell Labs layered space time; Antenna accessories; Bandwidth; Base stations; Block codes; Diversity methods; Fading; MIMO; Receiving antennas; Signal to noise ratio; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
ISSN :
1550-2252
Print_ISBN :
1-4244-0266-2
Type :
conf
DOI :
10.1109/VETECS.2007.454
Filename :
4212882
Link To Document :
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