Effect of employing beamforming on OFDM systems in Rician channel

Author

Ng, Wee Teck ; Dubey, V.K.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

1

fYear

2002

fDate

25-28 Nov. 2002

Firstpage

57

Abstract

We analyze the inter-carrier-interference (ICI) caused by multiple Rician path and Doppler spreading in orthogonal frequency division multiplexing (OFDM) systems. The general form for the ICI power is derived by taking into consideration the correlation equation of the Rician channel. We have derived a equation for estimating the frequency tracking parameter. We also present examples by using ideal beamforming at the mobile. For a multiple Rician channel, it shows that the reduction in ICI power is not as much as in the case of Rayleigh channel. However, in the presence of only one Rician path, the reduction in ICI power is marginally better than the Rayleigh channel.

Keywords

OFDM modulation; Rayleigh channels; Rician channels; array signal processing; frequency estimation; land mobile radio; multipath channels; radio tracking; radiofrequency interference; Doppler spreading; ICI power; OFDM systems; Rayleigh channel; Rician channel; beamforming; correlation equation; frequency tracking parameter estimation; inter-carrier-interference; mobile radio; multipath channel; orthogonal frequency division multiplexing; Array signal processing; Digital audio broadcasting; Digital video broadcasting; Equations; Frequency division multiplexing; Intersymbol interference; OFDM; Rayleigh channels; Rician channels; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Systems, 2002. ICCS 2002. The 8th International Conference on

Print_ISBN

0-7803-7510-6

Type

conf

DOI

10.1109/ICCS.2002.1182437

Filename

1182437