DocumentCode :
2264367
Title :
Performance Analysis of Transmit Diversity Systems with Multiple Antenna Replacement
Author :
Park, Ki-Hong ; Ko, Young-Chai ; Yang, Hong-Chuan
Author_Institution :
Korea Univ., Seoul
fYear :
2007
fDate :
17-19 Oct. 2007
Firstpage :
302
Lastpage :
307
Abstract :
There are usually rate loss and power spreading effects associated with transmit diversity systems based on orthogonal space-time block coding (OSTBC). Proper antenna selection scheme can help more effectively utilize the transmit antenna and transmission power in such systems. In this paper, we propose a new antenna selection scheme for such systems based on the idea of antenna switching. In particular, targeting at reducing the number of pilot channels and RF chains, the transmitter now replaces the antennas with the lowest received SNR with unused ones if the output SNR of space time decoder at the receiver is below a certain threshold. With this new scheme, not only the number of pilot channels and RF chains to be implemented is decreased, the average amount of information feedback is also reduced. To analyze the performance of this scheme, we derive the exact integral form expression for the probability density function (PDF) of the received SNR. We show through numerical examples that the proposed scheme offers better performance than traditional OSTBC systems using all available transmitting antenna, with a small amount of information feedback. We also examine the effect of different antenna configuration and feedback delay.
Keywords :
antenna arrays; block codes; decoding; delays; diversity reception; orthogonal codes; telecommunication switching; OSTBC; RF chains; antenna configuration; antenna selection scheme; antenna switching; feedback delay; information feedback; multiple antenna replacement; orthogonal space-time block coding; pilot channels; probability density function; space time decoder; transmission power; transmit antenna; transmit diversity systems; Antenna feeds; Block codes; Decoding; Feedback; Performance analysis; Propagation losses; Radio frequency; Receiving antennas; Transmitters; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communication Systems, 2007. ISWCS 2007. 4th International Symposium on
Conference_Location :
Trondheim
Print_ISBN :
978-1-4244-0979-2
Electronic_ISBN :
978-1-4244-0979-2
Type :
conf
DOI :
10.1109/ISWCS.2007.4392350
Filename :
4392350
Link To Document :
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