Name
Title | ||
|---|---|---|
Optimized training and basis expansion model parameters for doubly-selective channel estimation |
Abstract | ||
|---|---|---|
We address the problem of estimating doubly-selective channels using pilot clusters that are time-division multiplexed with the data. The pilot clusters consist of zero-padded pilot symbols in order to decouple channel estimation from data detection. Channel estimation is carried out using the basis expansion model (BEM-)based method, where different BEMs are investigated, and the exact MMSE method which requires full knowledge of the channel statistics. For a fixed number of pilot symbols, we attempt to optimize the power and placement of the pilot symbols at the transmitter side used in transmission, and the number of BEM coefficients used in channel estimation, in the sense of minimizing the total mean-square estimation error (MSE) that includes modelling error. Simulation results confirm that for a wide range of SNR and Doppler spread values, this optimization greatly reduces the MSE and the bit-error rate, and that modelling error, which was ignored in existing work on training design, should be taken into account. The effects of uncertainty in the channel statistics are also studied. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1109/TWC.2009.080364 | IEEE Transactions on Wireless Communications |
Keywords | Field | DocType |
channel estimation,error statistics,mean square error methods,time division multiplexing,Doppler spread values,MMSE method,basis expansion model parameters,bit-error rate,channel statistics,data detection,doubly-selective channel estimation,mean-square estimation error,optimized training,pilot clusters,time-division multiplexed,zero-padded pilot symbols,Channel estimation,basis-expansion model,doubly selective,time-varying | Transmitter,Signal-to-noise ratio,Mean squared error,Algorithm,Communication channel,Real-time computing,Estimation theory,Statistics,Time-division multiplexing,Multiplexing,Mathematics,Bit error rate | Journal |
Volume | Issue | ISSN |
8 | 3 | 1536-1276 |
Citations | PageRank | References |
16 | 0.86 | 8 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Tim Whitworth | 1 | 30 | 1.93 |
| Mounir Ghogho | 2 | 1072 | 113.80 |
| D. C. Mclernon | 3 | 126 | 15.01 |