Name
Abstract | ||
|---|---|---|
We consider half-duplex amplify-and-forward (AF) relaying for increasing network coverage and spectrum efficiency of an OFDM-based cellular system. Due to the fact that OFDM symbols are transmitted over two serial multipath channels (i.e., the source-relay link and the relay-destination link) via AF relaying, the time spread of the received signal at destination nodes is introduced by both source-relay and relay-destination channels. Consequently, cyclic prefix (CP) added at the source node should have a much longer length than that of one-hop OFDM transmission to avoid inter-symbol interference. However, the increased CP length leads to the reduced spectrum efficiency of OFDM communications. In this paper, we propose a novel CP update scheme for achieving efficient and reliable multi-hop transmission in OFDM-based AF relay systems. By enabling the additional CP discarding and CP re-adding functionalities to relay nodes, the proposed scheme significantly reduces the required CP length without causing extra loss in the bit error rate performance, and therefore improves achievable end-to-end throughput and spectrum utilization efficiency. Simulation results confirm the theoretical analysis and illustrate the effectiveness of the proposed scheme. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1007/s11277-013-1149-1 | Wireless Personal Communications |
Keywords | Field | DocType |
ofdm-based af,ofdm amplify-and-forward relay systems,cyclic prefix update,ofdm symbol,ofdm communication,required cp length,additional cp discarding,af relaying,proposed scheme,novel cp update scheme,cp re-adding functionalities,increased cp length | Cyclic prefix,Computer science,Computer network,Communication channel,Interference (wave propagation),Spectral efficiency,Throughput,Relay,Orthogonal frequency-division multiplexing,Bit error rate | Journal |
Volume | Issue | ISSN |
72 | 4 | 1572-834X |
Citations | PageRank | References |
2 | 0.42 | 16 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Bin Zhou | 1 | 109 | 5.36 |
| Honglin Hu | 2 | 820 | 84.65 |
| Haifeng Wang | 3 | 14 | 2.01 |