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http://dx.doi.org/10.5909/JBE.2016.21.4.552

A Channel Estimation Scheme for OFDM receiver in a Fast Mobile SFN Channel  

Gu, Young Mo (Department of Information & Communications)
Publication Information
Journal of Broadcast Engineering / v.21, no.4, 2016 , pp. 552-561 More about this Journal
Abstract
In OFDM system, frequency-domain sub-carriers of a symbol generally consist of data sub-carriers and scattered pilot sub-carriers and in the receiver, channel is estimated through time-axis interpolating pilot sub-carriers of several OFDM symbols. However, time-axis interpolation fails to keep track of rapid channel variation caused by fast moving receiver. Although symbol by symbol channel estimation without time-axis interpolation enables fast estimation, the performance is severely degraded for a long delay spread channel in a single frequency networks (SFNs) because of insufficient pilot sub-carriers. In this paper, a channel estimation scheme for OFDM receiver in a fast mobile SFN channel is proposed. The proposed scheme is applied to DVB-T receiver to improve the Doppler mobile performance in SFN channel.
Keywords
mobile; SFN; OFDM; DVB-T; Doppler;
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