A precoding method for closed-loop MIMO-OFDM systems

Author

Khuong, Nguyen Quoc ; Van Duc, N. ; Trung, Nguyen Quoc ; Tu, Vu Thi Minh

Author_Institution

Fac. of Electron. & Telecommun., Hanoi Univ. of Technol., Hanoi

fYear

2008

fDate

6-9 Oct. 2008

Firstpage

431

Lastpage

433

Abstract

This paper presents a precoding method for closed loop MIMO-OFDM systems. For precoding, the codeword is selected by comparing the unitary channel matrix, obtained from the SVD method, with a predefined codebook. The performance of closed and open-loop MIMO-OFDM systems is investigated for the case of perfect and imperfect CSI, as well as for different level of quantization. The simulation results show that the first one outperforms the later one in all case. The system performance gain depends on the number of bits using for feedback channel.

Keywords

MIMO communication; OFDM modulation; channel coding; feedback; precoding; quantisation (signal); singular value decomposition; CSI quantization; SVD method; channel state information; closed-loop MIMO-OFDM system; feedback channel; multiple-input multiple-output system; open-loop system; orthogonal frequency division multiplexing system; precoding method; singular value decomposition; Adaptive coding; Bandwidth; Channel capacity; Communications technology; Feedback; Frequency; Paper technology; Receiving antennas; Transmitters; Transmitting antennas; CSI - Channel State Information; Closed; Open-Loop MIMO-OFDM system; Precoding; SVD- Singular Value Decomposition;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Technologies for Communications, 2008. ATC 2008. International Conference on

Conference_Location

Hanoi

Print_ISBN

978-1-4244-2680-5

Electronic_ISBN

978-1-4244-2681-2

Type

conf

DOI

10.1109/ATC.2008.4760615

Filename

4760615