基于FPGA的LTE空间复用预编码的实现

Implementation of LTE spatial multiplexing based on FPGA

通过分析基于现场可编辑门阵列(FPGA)的长期演进(LTE)物理层中空间复用预编码实现的问题,提出了一种基于码本的预编码实现算法。根据上层告知的属性参数在预先建立的系数表和加减关系表中查表,对层映射后的数据先进行系数乘法运算,再进行加减运算,从而代替了复数矩阵乘法运算。因此可以大大减少预编码环节中的复数矩阵乘法次数,并降低了编码处理的复杂度,提高了编码运算的速度。仿真实验结果表明,所提算法能够很好地实现系统功能。

Through the analysis of Field-Programmable Gate Array（FPGA）-based spatial multiplexing coding problem in Long Term Evolution（LTE）,an implementation of codebook-based precoding was proposed.According to the parameters of the upper informed carried on the table look-up in the mathematical table and the addition and subtraction relations table,the data of layer mapping first carried on coefficient multiplication,and then with addition and subtraction,thus this has replaced the complex matrix multiplication operation.Therefore,this method can greatly reduce the complex matrix multiplication operation in the precoding procedure,and reduce the complexity of encoding process,improve the speed of the encoding operation.The experimental results indicate that the proposed algorithm can achieve a good system performance.