Impact Analysis of Threshold Rate on Two-Way Relaying System
Jingjing Shi · Xi'an Jiaotong Daxue xuebao · 2011
In order to analyze the impact of the asymmetric threshold rate on the performance of two-way relaying system more precisely,a method named performance analysis of ratio of threshold rate(RTR) is presented.The RTR is defined based on two directional threshold rates,then performance expressions are derived to obtain a function of RTR and the effect of the RTR on performance expressions is studied to obtain the effect of asymmetric threshold rate on the performance of the system.The proposed method is used to analyze the outage probability in Nakagami -m fading channel,and the results show that the outage probability increases with RTR increasing when the ratio of signal to noise(SNR) is a constant.Simulation results show that the outage probability increases by about 3%when the fading parameter pertaining to each terminalpair -relay link is 1 and 1.2,respectively,SNR is 20 dB,and RTR increases from 1 to 3.