一种LTE系统中计算CFI值的方法木

摘要

This paper investigated the problems of information redundancy for carrying PDCCH transmission and inefficiency for detecting PDCCH blindly in LTE system. Proposed a modified method of calculating CFI value. Before multiplexing, this method distributed the rate-matching value with the length of 1/2/4/8 CCE to each PDCCH in decreasing order. The simulation results show that this method can effectively eliminate the redundant information and reduce the average numbers of PDCCH blind detection.%重点研究了LTE系统中存在承载PDCCH(physical downlink control channel,物理下行控制信道)传输的信息冗余和PDCCH盲检效率较低的问题,提出了一种改进的计算CFI值的方法.该方法按照速率匹配值的降序为各个PDCCH分配1/2/4/8个CCE(control channel element,控制信道元素),再复用各个PDCCH.仿真结果表明该方法能够有效地消除冗余信息,减少PDCCH盲检的平均次数.