Abstract
User-cooperation or relaying through other nodes is an efficient approach to obtain diversity in wireless networks. In this paper, we consider a coded cooperative system under quasi-static Rayleigh fading and find conditions on the inter-user and user-to-destination channel qualities for cooperation to be beneficial. We define the user cooperation gain (G f) as the gain in frame error rates due to cooperation when a particular channel code is used. We introduce the cooperation decision parameter (CDP) which is only a function of user-to-destination channel qualities and demonstrate that whether cooperation is useful or not (G f > 1 or G f < 1) depends only on the cooperation decision parameter, not inter-user link quality. We make use of the analytical formulation of the CDP to explore how user cooperation gain behaves in high signal to noise ratios and how relative link qualities of user-to-user and user-to-destination channels affect cooperation benefits in this asymptotic range. Furthermore, we investigate how one can choose a partner from candidate nodes such that the user cooperation gain is larger. All of our theoretical results are supported by simulations.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1333-1337 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 60 |
| Issue number | 2 |
| State | Published - 2004 |
| Event | 2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States Duration: Sep 26 2004 → Sep 29 2004 |
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics