Low-complexity sampling point selection in OFDM receiver with fractional sampling

Author

Sakai, Eisuke ; Nishimura, Haruki ; Inamori, Mamiko ; Sanada, Yukitosi ; Ghavami, Mohammad

Author_Institution

Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan

fYear

2010

fDate

17-20 Oct. 2010

Firstpage

662

Lastpage

667

Abstract

To achieve diversity with a single antenna, a fractional sampling (FS) scheme in OFDM has been investigated. In addition, to obtain more diversity gain through FS, a sampling point selection (SPS) scheme has been proposed. However, it requires a large number of multiplication operations for the SPS. This leads to large power consumption and costs for additional circuits. In this paper, a low-complexity SPS scheme is proposed. There is the trade-off between the diversity gain and the estimation accuracy. The serial process of the channel estimation requires only a DFT block with the size of N/4 as the additional circuit.

Keywords

OFDM modulation; channel estimation; discrete Fourier transforms; radio receivers; DFT block; OFDM receiver; channel estimation; diversity gain; estimation accuracy; fractional sampling scheme; low-complexity sampling point selection; orthogonal frequency division multiplexing; Bit error rate; Channel estimation; Channel models; Delay; Discrete Fourier transforms; Estimation; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory and its Applications (ISITA), 2010 International Symposium on

Conference_Location

Taichung

Print_ISBN

978-1-4244-6016-8

Electronic_ISBN

978-1-4244-6017-5

Type

conf

DOI

10.1109/ISITA.2010.5649681

Filename

5649681