Performance Analysis and Training Power Allocation for Channel Estimation of MIMO/OFDM Systems Using Superimposed Training

Author

Zhang, Han ; Dai, Xianhua

Author_Institution

Dept. Phys. & Telecommun. Eng., South China Normal Univ., Guangzhou, China

fYear

2010

fDate

23-25 Sept. 2010

Firstpage

1

Lastpage

4

Abstract

This paper deals with the problem of channel estimation for multiple-input multiple-output/orthogonal frequency-division multiplexing (MIMO/OFDM) systems based on superimposed training (ST). Channel coefficients are firstly estimated by judicious designing superimposed pilot sequences across different users. Then, we analyze the channel estimation performance and derive a closed-form expression for estimation variance. For wireless communications with a limited power, we optimize the ST power allocation by maximizing the lower bound of the average channel capacity. Illustrative simulation examples are provided.

Keywords

MIMO communication; OFDM modulation; channel estimation; MIMO-OFDM systems; average channel capacity; channel coefficients; channel estimation; estimation variance; multiple-input multiple-output systems; orthogonal frequency-division multiplexing; power allocation; superimposed pilot sequences; superimposed training power allocation; wireless communications; Channel estimation; Estimation; Interference; MIMO; OFDM; Signal to noise ratio; Training;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-3708-5

Electronic_ISBN

978-1-4244-3709-2

Type

conf

DOI

10.1109/WICOM.2010.5600136

Filename

5600136