Title :
An Efficient Adaptive Modulation Algorithm for D-STTD System
Author :
Ham, Jaesang ; Kim, Kyeongyeon ; Shim, Seijoon ; Lee, Chungyong
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Abstract :
In this paper, we consider double space time transmit diversity (D-STTD) with an adaptive modulation (AM) algorithm. The simple criteria to use AM algorithm and antenna shuffling pattern are proposed according to linear receivers such as zero-forcing and minimum mean square error receiver. The AM algorithms are derived to minimize bit error rate (BER) under the fixed total data rate and total transmit power. The D-STTD system using the proposed algorithms requires low computational complexity and small feedback information bits. The performance of D-STTD system using the proposed algorithm is improved by about 5.8 dB or more in signal to noise ratio (SNR) corresponding to 10-3 BER. Additionally, using antenna shuffling, BER performance is more improved, but more feedback information bits are also required.
Keywords :
MIMO communication; adaptive modulation; antenna arrays; diversity reception; error statistics; least mean squares methods; BER; MIMO system; adaptive modulation algorithm; antenna shuffling pattern; bit error rate; computational complexity; double space time transmit diversity; linear receivers; minimum mean square error receiver; multiple-input multiple- output system; signal to noise ratio; zero-forcing receiver; AWGN; Bit error rate; Computational modeling; Computer networks; Feedback; MIMO; Receiving antennas; Signal to noise ratio; Transmitting antennas; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.126
