Abstract
In this paper, an adaptive MIMO transmission scheme using QAM and LDPC code is proposed for an OFDM cellular system employing FDD. By approximating the LLR distribution to a Gaussian distribution, only two parameters, the mean and the normalized standard deviation, are required to be sent to the transmitter, which requires only a few more bits than those required in currently used single carrier cellular systems, such as cdma2000-1x EV-DO. It is shown by computer simulation that the proposed adaptive transmission scheme can provide up to 2 - 3dB gain over the conventional system using the mean SNR only, at the expense of only 3 more bits in the feedback information.
| Original language | English |
|---|---|
| Pages (from-to) | 761-764 |
| Number of pages | 4 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 59 |
| Issue number | 2 |
| Publication status | Published - 2004 |
| Event | 2004 IEEE 59th Vehicular Technology Conference, VTC2004-Spring: Towards a Global Wireless World - Milan, Italy Duration: 2004 May 17 → 2004 May 19 |
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics