ERGODIC CAPACITY ANALYSIS FOR SIMO COGNITIVE FADING CHANNEL IN SPECTRUM SHARING ENVIRONMENT  

作　　者：Yang Yang Wang Jinlong Wu Qihui Liu Xin 

机构地区：[1]Institute of Communication Engineering,PLA University of Science and Technology, Nanjing 210007,China

出　　处：《Journal of Electronics(China)》2010年第5期677-685,共9页电子科学学刊（英文版）

基　　金：Supported by the National Basic Research Program (973) of China (No. 2009CB320400);the National High-Tech Research and Development Program (863) of China (No. 2009AA01Z243);the National Natural Science Foundation of China (No. 61072044);the Natural Science Fund of Jiangsu Province (BK2009056)

摘　　要：In this paper,we consider the spectrum sharing Cognitive Radio(CR) system,wherein Single-Input Multi-Output(SIMO) cognitive fading channel is assumed.Subject to the average in-terference constraint of primary user,the ergodic capacity of cognitive user involving joint beamforming and power control is analyzed.We derive the optimal joint beamforming and power control strategy and deduce the general integral expression for ergodic capacity.Furthermore,under different channel fadings including Raleigh fading,Nakagami-m fading and Lognormal shadowing fading,the specific expressions of ergodic capacity for SIMO cognitive channel are exhibited.Most of the expressions are presented in closed-form or with some special integral functions.Large amount of simulations are conducted to corroborate our theoretical results.In this paper,we consider the spectrum sharing Cognitive Radio（CR） system,wherein Single-Input Multi-Output（SIMO） cognitive fading channel is assumed.Subject to the average in-terference constraint of primary user,the ergodic capacity of cognitive user involving joint beamforming and power control is analyzed.We derive the optimal joint beamforming and power control strategy and deduce the general integral expression for ergodic capacity.Furthermore,under different channel fadings including Raleigh fading,Nakagami-m fading and Lognormal shadowing fading,the specific expressions of ergodic capacity for SIMO cognitive channel are exhibited.Most of the expressions are presented in closed-form or with some special integral functions.Large amount of simulations are conducted to corroborate our theoretical results.

关 键 词：Cognitive Radio (CR) BEAMFORMING Power control Ergodic capacity Single-Input Multi-Output (SIMO) 

分 类 号：TN92[电子电信—通信与信息系统]