Title :
A pilot aided averaging channel estimator for DVB-T2
Author :
Zettas, Spiridon ; Lazaridis, Pavlos I. ; Zaharis, Zaharias D. ; Kasampalis, S. ; Cosmas, J.
Author_Institution :
Sch. of Eng. & Design, Brunel Univ., Uxbridge, UK
Abstract :
In DVB-T2 broadcasting applications, errors occur due to channel imperfections, reducing the system´s throughput. The use of a channel estimator and equalizer counteracts the channel induced distortions and thus improves the system´s Bit Error Rate (BER). In our study, a simple-to-implement channel estimator is proposed. It is based on averaging the sub-channel frequency responses of successive OFDM symbols in time, considering a very slow time-varying channel. In the frequency domain, spline interpolation is applied. The proposed estimator can be used in practical receivers with limited computation power and low memory capacity.
Keywords :
digital television; error statistics; interpolation; splines (mathematics); wireless channels; BER; DVB-T2 broadcasting applications; bit error rate; channel imperfections; channel induced distortions; memory capacity; pilot aided averaging channel estimator; spline interpolation; subchannel frequency; time varying channel; Channel estimation; Digital video broadcasting; Indexes; OFDM; Quadrature amplitude modulation; Time-frequency analysis; Channel estimation; DVB-T2; OFDM; scattered pilots;
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2013 IEEE International Symposium on
Conference_Location :
London
DOI :
10.1109/BMSB.2013.6621712
