Title :
Adaptable Channel Decomposition for Time-Varying MIMO System with QoS Constraints
Author :
Hu, Jie ; Xie, Xianzhong ; Feng, Suili ; Lu, Jianqiang
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou
Abstract :
We propose a jointly designing transceiver for time-varying multiple-input multiple-output (MIMO) systems. Based on geometric mean decomposition (GMD), the scheme decomposes a MIMO channel into parallel subchannels with identical capacities and each subchannel meets certain BER constraints. Thus the power loading and modulation/demodulation process are particularly simplified because of the identical signal-to-interference-and-noise ratios (SINR) across the subchannels. We compare the average spectral efficiency (ASE) of our scheme with singular value decomposition-based continuous rate (SVD-CR) scheme, singular value decomposition-based discrete rate (SVD-DR) scheme and the scheme of GMD with subchannel selection (GMD-sel). Performance is investigated by simulation results.
Keywords :
MIMO communication; channel allocation; modems; quality of service; singular value decomposition; transceivers; wireless channels; MIMO channel; QoS constraints; adaptable channel decomposition; average spectral efficiency; geometric mean decomposition; modulation/demodulation process; power loading; singular value decomposition-based continuous rate scheme; singular value decomposition-based discrete rate scheme; subchannel selection; time-varying MIMO system; time-varying multiple-input multiple-output systems; transceiver; AWGN; Agricultural engineering; Bit error rate; Bit rate; Design engineering; MIMO; Modulation coding; Phase modulation; Signal to noise ratio; Time varying systems;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.526
