摘要
针对等功率分配(EPA)导致系统资源利用率低的问题,提出了一种旋转编码协作方案中的功率优化分配(OPA)方法。该方法首先利用Chernoff界推导了端到端系统误符号率(SER)的上界,然后在总功率一定的条件下,以最小化SER上界为目标,根据平均信道增益来计算源和中继间的功率分配因子。最后将功率分配信息通过反馈信道发送给协作用户,从而实现了功率的自适应分配,提高了系统的资源利用率。仿真结果验证了所提OPA方法的有效性。
To overcome the resource inefficiency results from equal power allocation（EPA）,an optimal power allocation（EPA） algorithm is proposed for the cooperative scheme utilizing rotation code.The upper bound of the end-to-end system symbol error rate（SER） is first derived using the Chernoff bound,and then under the total power constraint,the power factor is obtained to minimize the SER bound according to the average channel gains.The power allocation information is transmitted to cooperative users through feedback channels,so that the system source utilization can be improved.The effectiveness of the proposed OPA algorithm is verified by simulations.
出处
《电子科技》
2010年第6期59-63,共5页
Electronic Science and Technology
关键词
协作通信
旋转编码
误符号率
功率优化分配
cooperative communication
rotation code
symbol error rate
optimal power allocation
