Title :
A path selection technique for two-hop relay systems with TDoA
Author :
Woo, Kyung Soo ; Park, Chang Hwan ; Yoo, Hyun Il ; Kim, Jaekwon ; Han, Seung Hee ; Cho, Yong Soo
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea
Abstract :
In this paper, the effect of the time difference of arrival (TDoA) on synchronous types or asynchronous types of OFDMA-based multi-hop relay (MR) systems is investigated. Effective SINRs for downlinks and uplinks are defined to measure the degree of interference due to TDoA in asymmetric MR systems. A path selection technique based on the effective SINR is then proposed to determine the optimal paths for the uplink and downlink independently. It is shown that asymmetric routing can improve the performance of OFDMA-based MR systems when the proposed technique is applied to the path selection of the uplink taking into account the effect of the TDoA.
Keywords :
OFDM modulation; frequency division multiple access; time-of-arrival estimation; OFDMA-based multihop relay systems; asymmetric routing; path selection technique; time difference of arrival; two-hop relay systems; Downlink; Intersymbol interference; Land mobile radio cellular systems; Propagation delay; Relays; Resource management; Routing; Signal to noise ratio; Spread spectrum communication; Time difference of arrival;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5450267
