We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Cooperative Relaying Scheme for Orthogonal Frequency and Code Division Multiple Access Uplink System.
- Authors
Baik, Jung-In; Song, Hyoung-Kyu
- Abstract
Orthogonal frequency and code division multiplexing (OFCDM) which can be extended orthogonal frequency and code division multiple access (OFCDMA) has a good performance, because it can mitigate multi path interference while maintaining high data rate. Furthermore, cooperative OFCDM relaying system provides these advantages, and this system can effectively use the limited resource with respect to data rate and each terminal's energy efficiency. Therefore we proposed cooperative OFCDMA relaying uplink system because of the user's requirement of the high data rate at uplink. However, a throughput performance decreases when this system employs many relays in case of each relay allocated code channel to separate each relay's signal. Therefore, in this paper, we present that the proposed system combines cyclic delay diversity due to complement throughput performance problem. DF (Decode-and-Forward) is assumed in this paper. It is considered that the users which want to send data to BS only decode the data from other users. In addition to that, we propose the adaptive cooperative communication for the OFCDMA uplink system. The proposed adaptive system can easily select the cooperative relay.
- Subjects
CODE division multiple access; ORTHOGONAL frequency division multiplexing; MULTIPLEXING; SPREAD spectrum communications; TELECOMMUNICATION; DATA transmission systems; BROADBAND communication systems
- Publication
Wireless Personal Communications, 2013, Vol 70, Issue 1, p239
- ISSN
0929-6212
- Publication type
Article
- DOI
10.1007/s11277-012-0691-6