Abstract
In this paper, adaptive code-rate and modulation allocation algorithm are considered for multi-user OFDM system depending on transmission power and the transfer function of frequency selective channel. The purpose of the presented adaptive code-rate and modulation OFDM system using punctured convolutional code and various constellation size is to maximize total capacity and to adapt proper service for each user according to channel conditions and the transmit power while maintaining transmission's quality of service (QoS) at the receiver. Computer simulation results show that the capacity of the adaptive code-rate and modulation OFDM system can be adaptively changed for various services. Also performance of the system in multipath fading channel with different delay spread is also analyzed.
| Original language | English |
|---|---|
| Pages (from-to) | 1943-1947 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 56 |
| Issue number | 4 |
| State | Published - 2002 |
| Event | 56th Vehicular Technology Conference - Vancouver, BC, Canada Duration: Sep 24 2002 → Sep 28 2002 |
Keywords
- Adaptive code-rate and modulation
- Channl state information
- OFDM system
- Punctured convolutional code
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