摘要
OFDM系统中的高峰值功率会引起系统误码率性能恶化和非线性失真。文中研究了一种基于星座扩展的梯度投影算法,能有效地对OFDM系统中的高峰值功率进行控制。该算法采用一个在数据上呈现多零的预限幅向量,大大减小系统进行傅里叶变换时的计算量。仿真结果证明,梯度投影算法在保持峰值功率控制性能的同时,有效地加快了收敛速度,显著地降低算法的计算复杂度。
High PAPR leads to bit error rate degradati improved gradient projection algorithm based on conste in this paper. The clipped vector which consists of lots on and nonlinear distortion in OFDM system. An llation extension is proposed to solve the problem of zeros and few data reduces the computation of FFT greatly. The simulation results demonstrate that the proposed gradient projection algorithm can provide favorable PAPR reduction effectively with lower computational complexity and faster convergence speed.
出处
《信息技术》
2013年第10期58-61,共4页
Information Technology
基金
江苏省产学研基金资助项目(BY2009101)