摘要
协作伙伴的选取是影响协作通信网络性能的重要因素.为了增加系统可靠性及降低复杂度,提出了结合信道状态信息及距离信息的中继选择策略,探讨了中继选择标准和公式推导.选择因子是根据S-R瞬时信道增益和R-D距离共同确定,然后根据该因子得到最佳中继节点,同时给出选择策略的步骤.仿真结果表明,该策略能有效降低误码率,性能优于距离信息的中继点选择算法,运算量及复杂度低于瞬时信道信息的中继点选择算法.
Cooperative partnership selection is an important factor impacting cooperative communication network performance. In order to increase system reliability and reduce complexity, a relay selection strategy was put for-ward based on channel state information and distance information, and the relay selection criteria and formula deri- vation were discussed. The selection factor should be determined according to stimulus-response (S-R) instantane- ous channel gain and resolution-defocus (R-D) distance; in the following research, the best relay node was ob-tained according to this selection factor, and the steps of the selection strategy were provided. The simulation re- suits show that the strategy can effectively reduce the bit error rate (BER), and its performance is better than the relay node selection method based on distance information. The calculation work and complexity are lower than in the relay node selection method based on the instantaneous channel information.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第2期240-243,共4页
Journal of Harbin Engineering University
关键词
中继选择
译码转发
信道状态信息
距离信息
relay selection
decoding and forward
channel state information
distance information