基于传输分集信号检测的TD-LTE系统PDCCH解资源映射的算法研究  

Research of de-resource mapping algorithm for PDCCH based on transmit diversity signal detection in LTE system

作　　者：李小文[1] 罗佳[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《计算机应用研究》2013年第10期3061-3064,3074,共5页Application Research of Computers

基　　金：国家科技重大专项基金资助项目(2011ZX03001-003)

摘　　要：TD-LTE系统有传输分集和空间复用两种传输模式。对于PDCCH(physical downlink control channel,物理下行控制信道)的信号检测采用传输分集模式。传统PDCCH的解资源映射是以REG(resource element group,资源粒子组)为单位,并且要考虑参考信号,导致接收端计算量大大增加。提出一种改进算法,在信号检测时去除参考信号,进入解资源映射模块时即可以四元符号组为单位完成解资源映射,使计算量大大降低。该方案的可行性、高效性在TD-LTE射频一致性测试系统的开发中得到了验证,并实现于TMS320C64×DSP中,使系统性能得到了改善。TD-LTE system adopts transmit diversity and spatial multiplexing two modes. For PDCCH, using the transmit diver- sity mode. De-resource mapping unit of the traditional method for PDCCH is REG, and the reference signal has to be considered as well,so lead to the large calculation. This paper proposed a modified method, which removed the reference signal when do the signal detection,and then the unit of the de-resource mapping became the block of quadruplets, greatly reduced the calcu- lation. This program had been implemented in the TMS320C64 × DSP and applied to the development of TD-LTE RF conform- ance test system. The running results verify that the program is feasible and effective, the system performance is improved as well.

关 键 词：分时长期演进 传输分集 物理下行控制信道 解资源映射 实现 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]