摘要
针对数字电视地面广播信号(DTMB)峰均比较高的缺点,提出适合降低DTMB信号峰均比的三种算法:限幅法、星座图扩展法和两者联合的方法。限幅法可直接、简单地实现对高峰均比的抑制,星座图扩展法能够在不降低系统误码率性能的前提下实现高峰均比的有效降低。在16QAM调制的DTMB系统中对三种算法进行研究分析,结果表明,联合法相比于星座图扩展法计算复杂度更小,并且误码率性能也未有损失,实现了计算复杂度、误码率和峰均比抑制三方面性能的折中。
To overcome the shortcoming of high Peak-to-Average Power Ratio(PAPR)in Digital Terrestrial Multimedia Broadcasting(DTMB)system,three algorithms of clipping,active constellation extension,ACE and clipping is proposed for PAPR reduction.The clipping can reduce PAPR directly and simply.The ACE can effectively reduce the PAPR without reducing the bit error rate performance of the system.The three algorithms are studied and analyzed in DTMB system model modulated with 16QAM.The results show that,in comparison with ACE algorithm,the complexity of union algorithm is reduced,and BER performance is not loss.The algorithm has a compromise-balanced capability in the aspects of PAPR suppression efficiency,complexity and BER.
作者
梁天一
涂锐
朱辉杰
LIANG Tian-yi;TU Rui;ZHU Hui-jie(Science and Technology on Communication Information Security Control Laboratory,Jiaxing Zhejiang 314033,China;No.36 Research Institute of CETC,Jiaxing Zhejiang 314033,China;Unit 32086 of PLA,Shanghai 200000,China)
出处
《通信对抗》
2020年第3期9-12,共4页
Communication Countermeasures
关键词
DTMB
限幅法
星座扩展法
峰均比
DTMB
clipping
active constellation extension
peak-to-average power ratio(PAPR)
