基于深度限幅滤波的DTMB峰均比抑制技术研究  

Research on PAPR Reduction Techniques of DTMB Based on Deep Clipping and Filtering

作　　者：张丽丽[1] 叶宇煌[1] 苏凯雄[1] 吴林煌[1] 翁义龙[1] 

机构地区：[1]福州大学物理与信息工程学院,福建福州350002

出　　处：《电视技术》2013年第17期4-7,共4页Video Engineering

基　　金：福建省高校产学合作重大项目(2012H61010016);福州大学育苗基金项目(2012-XY-25)

摘　　要：针对DTMB系统已调信号具有峰均比高、容易产生严重非线性失真的问题,提出一种改进的限幅滤波方法。通过对限幅水平、限幅率和采样率等参数进行优化设计,使得本方法与传统方法相比,在PAPR降低量和误码率水平相似的情况下,计算复杂度大大减少。DTMB system has a high peak-to-average power ratio （PAPR）, which causes serious nonlinear to the power amplifier easily. For the drawback, an improved clipping and filtering method is proposed and the clipping level, clipping rate, sample rate and other parameters are optimized. MATLAB simulation results show that, compared with the conventional clipping and filtering techniques, its computational complexity is significantly reduced in case of similar PAPR reduction and level of BER.

关 键 词：DTMB 正交频分复用 峰均比 限幅滤波 限幅率 

分 类 号：TN943[电子电信—信号与信息处理]