Inter-Frame, Fine Frequency/Phase Synchronization forSimple Space-Time-Coded OFDM Receivers

Author

Nikitopoulos, Konstantinos ; Polydoros, Andreas

Author_Institution

Nat. & Kapodistrian Univ. of Athens, Athens

Volume

6

Issue

10

fYear

2007

fDate

10/1/2007 12:00:00 AM

Firstpage

3510

Lastpage

3514

Abstract

This paper proposes an enhanced receiver (Rx) configuration for multiple-input, multiple-output (MIMO) OFDM systems, operating under the composite effect of phase noise (PHN), residual frequency offset (RFO) and the transmission channel, herein modeled as quasi-static but unknown. The proposed Rx identifies the different impairments by exploiting their different time constants and compensates for each one accordingly. It includes a novel inter-frame fine frequency synchronization (FFS) scheme, which is closely coupled to an intra-frame adaptive phase synchronizer/channel estimator. The proposed scheme is evaluated for a 2 times 2, Alamouti space-time code (STC), and is shown to provide significant performance gain. The theory can be employed with any other STC scheme.

Keywords

MIMO communication; OFDM modulation; channel estimation; radio receivers; space-time codes; synchronisation; wireless channels; Alamouti space-time code; MIMO system; channel estimator; fine frequency synchronization; intra-frame adaptive phase synchronizer estimator; phase noise; phase synchronization; residual frequency offset; space-time-coded OFDM receivers; transmission channel; AWGN; Channel estimation; Degradation; Frequency estimation; Frequency synchronization; MIMO; OFDM; Performance gain; Phase estimation; Phase noise;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.060027

Filename

4350298