Effects of Virtual Carriers of Channel Estimation for OFDM Systems with Transmit Diversity

Author

Wang, Yi ; Tan, Bo ; Tao, Xiaofeng ; Zhang, Ping

Author_Institution

Key Lab. of Universal Wireless Commun., BUPT, Beijing

fYear

2008

fDate

11-14 May 2008

Firstpage

1152

Lastpage

1156

Abstract

In this paper, the performance of discrete Fourier transform (DFT) based channel estimation (CE) for orthogonal frequency division multiplexing (OFDM) systems with transmit antenna diversity is analyzed. Conventional DFT-based CE suffers from the dispersive distortion of an estimated channel impulse response (CIR) due to the existence of virtual carriers (VCs). We analyze the mean squared error (MSE) performance and provide a concise expression which reveals the leakage effect due to VCs. Further, analytical expression for bit error rate (BER) with the effect of VCs is also derived. Simulation results illustrate the accuracy of the theoretical analysis.

Keywords

OFDM modulation; channel estimation; discrete Fourier transforms; diversity reception; transient response; OFDM systems; bit error rate; channel estimation; channel impulse response; discrete Fourier transform; mean squared error; orthogonal frequency division multiplexing; transmit antenna diversity; transmit diversity; virtual carriers; Bit error rate; Channel estimation; Discrete Fourier transforms; Dispersion; Frequency domain analysis; OFDM; Performance analysis; Phase shift keying; Transmitting antennas; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE

Conference_Location

Singapore

ISSN

1550-2252

Print_ISBN

978-1-4244-1644-8

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2008.244

Filename

4525800