LTE上行固定频偏的一种校正优化方案

A correcting optimization scheme of LTE uplink fixed frequency offset

按照LTE协议规定,终端侧在LTE上行链路生成SC-FDMA基带符号时,会产生1/2子载波间隔的的固定频偏,在基站侧需要对接收的时域信号做固定频偏校正。文中通过对LTE协议的相关分析,提出了一种优化方案,该方案使用三角函数的转换关系,对固定频偏校正算法公式中的复指数系数进行复用,最终达到优化FPGA芯片的BLOCK RAM资源的目的。

According to the LTE technical specification, when the terminal side in the uplink of LTE generation SC-FDMA baseband symbol, produces 1/2 of the fixed frequency offset of the subcarrier spacing,the base station side in the time-domain signal needs to be received by a fixed frequency offset correction. The paper analyzes the LTE technical specification, proposed an optimization scheme that using the trigonometric function transformation, the fixed frequency offset correction algorithm in complex exponential coefficient formula are multiplexed, and finally it achieves the optimization purposes of BLOCK RAM resources in FPGA chip.