Name
Abstract | ||
|---|---|---|
A novel cyclic-prefix based delay-spread estimation technique for wireless OFDM systems is proposed. In particular, the authors propose a technique for estimating the delays and powers of multipath components when the channel is sparse, i.e. a few strong multipaths distantly spaced in time, and a technique for estimating the RMS delay-spread when the channel has a large number of sample-spaced multipath components. The proposed techniques are based on a multiple-argument correlation function which exhibits change of gradient according to the delay path arrival pattern, i.e delay times and powers. Numerical results demonstrate the accuracy of the proposed techniques in estimating the relative timing and the power of delay paths for a sparse multipath channel, and the RMS delay-spread for a sample-spaced multipath channel. Moreover, the RMS delay-spread estimation can be used adaptively to operate the MMSE channel estimation process in the OFDM receiver at near optimum. |
Year | DOI | Venue |
|---|---|---|
2003 | 10.1049/ip-com:20040551 | Communications, IEE Proceedings- |
Keywords | DocType | Volume |
wireless ofdm systems,multiple-argument correlation function,cyclic-prefix,ofdm modulation,interpolation,frequency domain channel response interpolation process,ofdm receiver,frequency estimation,parameter estimation,relative timing estimation,computational efficiency,mmse channel estimation,delay-spread estimation,cyclic-prefix estimation technique,multipath environment,viterbi search algorithm,multipath channels,timing,least mean squares methods,rms delay-spread estimation,gradient methods,sparse multipath channel,radio receivers,wireless ofdm system,frequency synchronization estimation,correlation function gradient change,delay estimation,symbol timing estimation,correlation methods,channel estimation,synchronisation,search algorithm,correlation function,mathematical models,additive white gaussian noise,white noise,computational complexity,signal to noise ratio,frequency domain | Conference | 151 |
Issue | ISSN | ISBN |
6 | 1350-2425 | 0-7803-7663-3 |
Citations | PageRank | References |
29 | 2.20 | 10 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Chandra R. N. Athaudage | 1 | 62 | 5.55 |
| Dhammika Jayalath | 2 | 197 | 20.50 |