Abstract
We propose a variable power and rate adaptive MQAM modulation scheme for high-speed data transmission on fading channels. We show that using just five or six different signal constellations achieves within 1-2 dB of the maximum spectral efficiency. We also obtain the exact efficiency loss for a smaller constellation set. In addition, we compare our technique with a fixed-rate scheme which inverts the channel fading. Assuming perfect power control, the fixed-rate scheme exhibits a 5-10 dB loss in spectral efficiency relative to our adaptive technique. We conclude by discussing performance degradation caused by channel measurement errors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 815-819 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 2 |
| State | Published - 1996 |
| Externally published | Yes |
| Event | Proceedings of the 1996 IEEE 46th Vehicular Technology Conference. Part 1 (of 3) - Atlanta, GA, USA Duration: Apr 28 1996 → May 1 1996 |
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics