Title :
A Partial MRT Algorithm for Closed-Loop Spatial Multiplexing Systems with Transmit Antenna Selection
Author :
Zhu, Yaolin ; Fang, Yong ; Wang, Junhua
Author_Institution :
Sch. of Commun. & Inf. Eng., Shanghai Univ.
Abstract :
The paper investigates closed-loop spatial multiplexing systems with transmit antenna selection. Since the bandwidth limit of feedback channel, a partial MRT algorithm is proposed to reduce the amount of feedback information. An improved water-filling power allocation algorithm is obtained for optimal power allocation. The proposed method can not only reduce the amount of feedback, but also fully exploit potential multiplexing capability of the channel. Simulation results show that transmit antenna selection can compensate the loss caused by imperfect CSI at the transmitter
Keywords :
bandwidth allocation; channel allocation; closed loop systems; feedback; multiplexing; transmitting antennas; channel multiplexing capability; closed-loop spatial multiplexing systems; feedback channel bandwidth limitation; maximal ratio transmission; partial MRT algorithm; transmit antenna selection; water-filling power allocation algorithm; Array signal processing; Channel capacity; Channel state information; Feedback; Maximum likelihood decoding; Propagation losses; Radio frequency; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on
Conference_Location :
Wuhan
Print_ISBN :
1-4244-0517-3
DOI :
10.1109/WiCOM.2006.171
