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| Content Provider | IET Digital Library |
|---|---|
| Author | Kalyani, Sheetal Lakshminarayanan, Raghavendran Giridhar, Krishnamurthy |
| Abstract | In orthogonal frequency division multiple access-based systems where channel frequency response (CFR) estimation has to be carried out using only the user-specific (localised) pilots within a small time frequency block, the accuracy of the estimates suffer because of the limited number of pilots and imperfect knowledge of the channel statistics. A biased estimator is proposed for the estimation of CFR over the time frequency block. Hypothesis tests are designed to ascertain the time and frequency selectivity of the CFR within the region of interest, and the outcome of these tests are used to determine a vector shrinkage target for the biased estimator. Simulation results indicate that the performance of the proposed estimator is comparable to that of the optimal minimum mean square error estimator, even though it does not have any knowledge of the channel statistics. |
| Starting Page | 13 |
| Ending Page | 22 |
| Page Count | 10 |
| ISSN | 17518628 |
| Volume Number | 7 |
| e-ISSN | 17518636 |
| Issue Number | Issue 1, Jan (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/7/1 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2011.0910 |
| Journal | IET Communications |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Adaptive Shrinkage Targets Biased Estimators CFR Estimation Channel Estimation Channel Frequency Response Estimation Channel Statistics Communication Channel Equalisation And Identification Frequency Division Multiple Access Frequency Response Hypothesis Tests Interpolation And Function Approximation Mean Square Error Method Modulation And Coding Method Multiple Access Communication Numerical Analysis OFDM Modulation Optimal Minimum Mean Square Error Estimator Orthogonal Frequency Division Multiple Access Channel Estimation Orthogonal Frequency Division Multiple Access-based System Region of Interest Small Time Frequency Block Statistical Testing Statistics User-specific Pilots Vector Shrinkage Target |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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