Abstract
Orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (TDM), called OFDM/TDM, can bridge the conventional OFDM and single-carrier (SC) transmission by using the frequency-domain equalization (FDE). Accurate channel estimation is required for FDE. A well-known channel estimation scheme is pilot-based channel estimation that uses periodically transmitted pilot signals. If channel estimation error is present, the inter-symbol interference (ISI) is produced in OFDM/TDM. In this paper, we apply a Gaussian approximation to the channel estimation error and theoretically investigate the impact of the imperfect channel estimation on the average bit error rate (BER) performance of OFDM/TDM. It is shown by the numerical evaluation that the channel estimation error degrades more the BER performance when OFDM/TDM approaches SC.
| Original language | English |
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| Pages (from-to) | 442-446 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 61 |
| Issue number | 1 |
| Publication status | Published - 2005 |
| Event | 2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm, Sweden Duration: 2005 May 30 → 2005 Jun 1 |