Novel OFDM transceiver with time-domain scrambling

Author

Wang, Haifeng ; Lilleberg, Jorma

Author_Institution

Nokia Corp., Oulu, Finland

Volume

6

fYear

2004

fDate

29 Nov.-3 Dec. 2004

Firstpage

3984

Abstract

In cellular OFDM systems with the frequency reuse factor as one, all the same subcarriers are used in every sector of adjacent cells. This induces very strong intercell interference, particularly for the user equipment at the cell edge. A novel OFDM transceiver with time-domain scrambling is proposed in this paper to suppress the intercell interference and provide the frequency diversity. Numerical results proved that the proposed scheme considerably improves the spectrum efficiency and the overall OFDM system throughput in both single-cell and multicell environments. By using long scrambling in the time domain, an improvement in estimates of channel tap delays for frame synchronization and fast cell search can be also realized.

Keywords

OFDM modulation; cellular radio; channel estimation; diversity reception; frequency allocation; interference (signal); synchronisation; transceivers; OFDM transceiver; adjacent cell sector identical subcarriers; cell edge intercell interference; cellular OFDM systems; channel tap delay estimation; fast cell search; frame synchronization; frequency diversity; frequency reuse factor; multicell environments; single-cell environments; spectrum efficiency; system throughput; time-domain scrambling; Delay estimation; Downlink; Fast Fourier transforms; Frequency diversity; Frequency domain analysis; Interference suppression; Multiaccess communication; OFDM; Time domain analysis; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE

Print_ISBN

0-7803-8794-5

Type

conf

DOI

10.1109/GLOCOM.2004.1379115

Filename

1379115