Title :
On Performance of Judging Region and Power Allocation for Wireless Network Coding with Asymmetric Modulation
Author :
Zhang, Xiaoguang ; Li, Yonghua ; Lin, Jiaru ; Guo, Li
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
We investigate a decode and forward (DF) scheme of Asymmetric modulation suited for two-way relay (TWR) with network coding. The considering network coding consists of two time-slots: two users transmit wireless signal to the relay in time-slot 1, and the processed signal is broadcasted in time-slot 2 by the relay. With the received asymmetric modulated signals by relay in time-slot 1, the judging, coding and power allocating problems are investigated. A judging region (JR) scheme is proposed to solve the issues and the symbol error ratio (SER) is derived. We also give the optimized power allocation method of JR scheme according to different asymmetric modulations. The performance evaluations show correctness of SER expression and efficiency of power allocation method.
Keywords :
decode and forward communication; error statistics; modulation; network coding; wireless channels; DF scheme; JR scheme; SER; TWR; asymmetric modulation; decode and forward scheme; judging region allocation; power allocation; symbol error ratio; two-way relay; wireless network coding; Encoding; Fading; Network coding; Phase shift keying; Relays; Resource management;
Conference_Titel :
Network Coding (NetCod), 2011 International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-61284-138-0
DOI :
10.1109/ISNETCOD.2011.5979084
