论文部分内容阅读
多小区协作需要基站间交换大量的信息.为了降低无线回传开销和反馈开销,采用基于信漏噪比最大化的分布式预编码方法,该方法仅需共享干扰信道的信道状态信息,不需要共享数据,与特征值波束成形和小区间干扰清零两种极端的方法相比取得了性能提高.其次,为了更加有效利用反馈资源,推导了速率损耗公式,利用穷尽搜索得到使其最小化的最优解,得出比特自适应分配规律.仿真表明,根据期望信号和干扰信号强度自适应的分配反馈比特能进一步提高系统速率.
In order to reduce the wireless backhaul overhead and feedback overhead, a distributed pre-coding method based on maximization of SINR is adopted, which only needs to share the channel state information of the interfering channel and does not need Sharing data, and compared with the eigenvalue beamforming and inter-cell interference clear two extreme methods to obtain a performance improvement.Secondly, in order to make more efficient use of feedback resources, the rate of loss formula is derived, using exhaustive search to minimize it The optimal solution is obtained and the rule of adaptive allocation of bits is obtained.The simulation shows that the system rate can be further increased by adaptively allocating feedback bits according to the desired signal and interference signal strength.