Title :
Multi-user interference pre-cancellation for downlink signals of multi-beam satellite system
Author :
Wei Zheng ; Jianbo Li ; Yong Luo ; Jiang Chen ; Jianjun Wu
Author_Institution :
Inst. of Adv. Commun., Peking Univ., Beijing, China
Abstract :
Multi-user interference pre-cancellation is proposed in this paper for orthogonal frequency division multiple access (OFDMA) multi-beam satellite system to improve spectral efficiency as well as system capacity. Inter-beam interference model is demonstrated, and formulas of Carrier-to-Interference ratio (C/I) are presented, revealing severe co-channel interference among satellite beams. In order to reuse same channel among beams, Tomlinson-Harashima precoding (THP) is introduced to pre-cancel downlink interference of users from different beams, and its performance is analyzed.
Keywords :
OFDM modulation; cochannel interference; frequency allocation; frequency division multiple access; interference suppression; multibeam antennas; precoding; satellite communication; OFDMA multibeam satellite system; THP; Tomlinson-Harashima precoding; carrier-to-interference ratio; cochannel interference; downlink interference; interbeam interference model; multiuser interference precancellation; orthogonal frequency division multiple access multibeam satellite system; spectral efficiency; system capacity; Downlink; Interference; Manganese; OFDM; Satellite broadcasting; Satellites; Signal to noise ratio; Tomlinson-Harashima precoding; frequency reuse; interference pre-cancellation; multi-beam satellite communication;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2013 3rd International Conference on
Conference_Location :
Xianning
Print_ISBN :
978-1-4799-2859-0
DOI :
10.1109/CECNet.2013.6703358
