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Nearest Neighbor Decoding and Pilot-Aided Channel Estimation for Fading Channels
| Content Provider | MDPI |
|---|---|
| Author | Albert, Guillén I. Fàbregas Asyhari, A. Koch, Tobias |
| Copyright Year | 2020 |
| Description | We study the information rates of noncoherent, stationary, Gaussian, and multiple-input multiple-output (MIMO) flat-fading channels that are achievable with nearest neighbor decoding and pilot-aided channel estimation. In particular, we investigate the behavior of these achievable rates in the limit as the signal-to-noise ratio (SNR) tends to infinity by analyzing the capacity pre-log, which is defined as the limiting ratio of the capacity to the logarithm of the SNR as the SNR tends to infinity. We demonstrate that a scheme estimating the channel using pilot symbols and detecting the message using nearest neighbor decoding (while assuming that the channel estimation is perfect) essentially achieves the capacity pre-log of noncoherent multiple-input single-output flat-fading channels, and it essentially achieves the best so far known lower bound on the capacity pre-log of noncoherent MIMO flat-fading channels. Extending the analysis to fading multiple-access channels reveals interesting relationships between the number of antennas and Doppler bandwidth in the comparative performance of joint transmission and time division multiple-access. |
| Starting Page | 971 |
| e-ISSN | 10994300 |
| DOI | 10.3390/e22090971 |
| Journal | Entropy |
| Issue Number | 9 |
| Volume Number | 22 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-08-31 |
| Access Restriction | Open |
| Subject Keyword | Entropy Telecommunications Achievable Rates Fading High Signal-to-noise Ratio (snr) Mismatched Decoding Multiple-access Channels Multiple Antennas Nearest Neighbor Decoding Noncoherent Pilot-aided Channel Estimation |
| Content Type | Text |
| Resource Type | Article |
