Abstract
The transmission performance of an OFDM system can significantly be improved by exploiting the channel characteristics. In this paper, we consider the design of a channel-aware OFDM transceiver whose parameters are adjusted in response to the change of channel condition. To this end, we first estimate the channel state information (CSI), such as the signal to interference power ratio, low order moments of Doppler spectrum and power-delay profile of the channel. The proposed CSI estimator can estimate these CSI parameters altogether in a unique manner by exploiting the autocorrelation properties of the channel impulse response (CIR). Then, we design a CIR estimator and adaptive OFDM modulator that adjust their parameters according to the estimated CSI. Finally, we verify the performance of the proposed OFDM transceiver by computer simulation
| Original language | English |
|---|---|
| Pages (from-to) | 1813-1822 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 6 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2007 |
Bibliographical note
Funding Information:Manuscript received August 31, 2005; revised September 16, 2006; accepted December 26, 2006. The associate editor coordinating the review of this paper and approving it for publication was V. Lau. This work was presented in part at the IEEE International Conference on Communications, May 2005. This work was in part supported by the Ministry of Information & Communications, Korea, under the Information Technology Research Center (ITRC) Support Program.
Keywords
- Adaptive modulation with coding
- Channel impulse response
- Channel state information
- Channel-aware OFDM transceiver