在长期演进(LTE)上行随机接入中,接收端对前导的检测是一个很重要的步骤.由于前导序列较长,传统的接收端算法运算量较大.为了减小接收端算法的运算量,引入降采样,对传统的接收端算法进行改进.改进后的接收端算法运算量大大减少.以格式0为例,在一个计算周期内,改进后的算法运算量是改进前运算量的1/120.MATLAB仿真结果表明,改进前后的接收端算法在检测性能上差别较小.在不同的信道环境下,经过改进后的算法仍然具有较好的检测性能.
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