期刊文献+
任意字段
题名或关键词
题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

降低OFDM信号峰均功率比的研究 被引量：2

Research of reducing the peak-to-average power ratio of OFDM signal
原文传递
导出
摘要 OFDM系统的一大缺点就是有较高的峰值平均功率比(PAPR),大大降低了线性功率放大器的效率.本文提出一种用预编码(Precoding method)的方法来降低OFDM信号的PAPR,引入预编码矩阵将映射后的数据进行功率分配,从而达到降低PAPR的目的.该方法不影响频谱效率,不需要进行附加运算以及收发两端的握手信息.计算机仿真表明对传统的64个子载波OFDM系统PAPR有将近9dB的改善. The shortcoming of OFDM system is the high peak-to-average power ratio (PAPR) which greatly reduced the efficiency of the High Power Amplifier (HPA).This article proposes a new method to reduce PAPR,by using precoding matrix to redistribute the powerd istribution of the input sequence and then reduce the PAPR of OFDM signal.This method does not have any additional computations and shake-hand information at both transmitter and receiver.It achieves 9dB improvement compared to the conventional OFDM system with 64 subcarriers.
作者 胡迎刚 路云
机构地区 四川大学电子信息学院 四川师范大学成都学院
出处 《四川大学学报（自然科学版）》 CAS CSCD 北大核心 2009年第6期1655-1658,共4页 Journal of Sichuan University(Natural Science Edition)
关键词 OFDM信号 峰均功率比 POWER PAPR OFDM system POWER Amplifier 线性功率放大器 峰值平均功率比 预编码矩阵 conventional information 计算机仿真 new method 频谱效率 功率分配 方法 OFDM系统 high 子载波 matrix PAPR OFDM Precoding
分类号 N55 [自然科学总论]
  • 相关文献

参考文献5

  • 1付卫红,杨小牛,曾兴雯,刘乃安.MIMO-OFDM系统中的空时频编码技术[J].四川大学学报（自然科学版）,2006,43(5):1037-1042. 被引量：2
  • 2Slimane S B.Performance of OFDM Systems with Time-Limited Waveforms over Multipath Radio Channels[]..1998
  • 3Molisch A F,Win M Z,Winters J H.Space-time-frequency (STF) coding for MIMO-OFDM systems[].IEEE Communications Letters.2002
  • 4Tellambura C.Computation of the continuous-time PAR of an OFDM signal with BPSK subcarriers[].IEEE Communications Letters.2001
  • 5Huebner A,Schuehlein F,Bossert M,et al.A simplespace-frequency coding scheme with cyclic delay diversityfor OFDM. European Personal Mobile Communica-tions Conference-2003 . 2003

二级参考文献9

  • 1Bolcskei H, Borgmann M, Paulraj A J. Space-frequency coded MIMO-OFDM with variable multiplexing-diversity tradeoff[C]. Anchorage: A K 2003,4: 2837.
  • 2Helmut Bolcskei, Arogyaswami J P. Space-frequency coded broadband OFDM systems[ C]. Chicao: IL, 2000.
  • 3Huebner A, Schuehlein F, Bossert M. A simple space-frequency coding scheme with cyclic delay diversity for OFDM[ C].Glasgow: U K, 2003, 106.
  • 4Molisch A F, Win M Z, Winters J H. Space-time-frequency (STF) coding for MIMO-OFDM systems[J]. IEEE Communications Letters, 2002,6 (9):370.
  • 5Zhiqiang Liu, Yanxin, Georgios B G. Space-Time-Frequency Coded OFDM Over Frequency-Selective Fading Channels[J ].IEEE Transaction on signal processing, 2002,50 (10) : 2465.
  • 6Park S S, Kim H K, Balk H K. A Simple STF-OFDM Transmission Scheme with Maximum Frequency Diversity Gain[J].Proceedings of the 2004 International Symposium ( ISCAS ' 04), 2004,4:101.
  • 7Tarokh V. Space-Time Codes for High Data Rate Wireless Communication: Performance Criterion and Code Construction[J]. IEEE Trans. Info. Theory, 1998,44(2): 744.
  • 8Vahid Tarokh, Hamid Jafarkhani, Robert Calderbank A. Space-Time Block Coding for Wireless Communications: Performance Results[J]. IEEE Journal on Selected areas in Communications, 1999, 17(3) :451.
  • 9RickS Blum, Ye Li, Jack H, Winters, et al. Improved space-time coding for MIMO-OFDM wireless communications[J].IEEE transactions on communications, 2001,49 (11) : 1873.

共引文献1

同被引文献9

  • 1Hijazi H, Simon E P, Lienard M, et al. Channel es- timation for MIMO-OFDM systems in fast time-var- ying environments[C]. 4th International Symposium on Communications, Control and Signal Processing. Limassol, 2010: 1.
  • 2Zheng K, Su J, Wang W B. Iterative DFT-based channel estimation for MIMO-OFDM systems [C]. International Conference on Communications, Cir- cuits and Systems Proceedings. Guilin, 2006 : 1081.
  • 3Feng S P, Wu W L. DCT-based channel estimation method for MIMO-OFDM systems using phase shif- ted pilot sequences [C]. IEEE 2nd International Symposium on Wireless Pervasive Computing. San Juan, 2007: 159.
  • 4Diallo M, Rabineau R0 Cariou L, etal. On improved DCT based channel estimation with very low com- plexity for MIMO-OFDM systems [C]. IEEE 69th Vehicular Technology Conference. Barcelona, 2009; 1.
  • 5Wu D X. On comparison of pilot-aided OFDM chan- nel estimation algorithms [C]. International Confer- ence on Image analysis and Signal Processing. Hu- bei, 2011:31.
  • 6Chu D. Polyphase codes with good periodic correla- tion properties [J]. IEEE transactions on Informa- tionTheory. 1972, 18(4) :531.
  • 7Hidayat R, Isnawati A F, Setiyanto B. Channel esti- mation in MIMO-OFDM spatial multiplexing using least square method [C]. International Symposium on Intelligent Signal Processing and Communications Systems. Chiangmai, 2011 : 1.
  • 8Yeh Y H, Chen S G. DCT-based channel estimation foi OFDM systems [J]. IEEE International Confer- ence on Communications. Paris, 2004, :2442.
  • 9刘汉奎,郝希准,王云秀.基于反转相移导频的OFDM系统信道估计[J].四川大学学报（自然科学版）,2012,49(5):1049-1052. 被引量：1

引证文献2

二级引证文献4

四川大学学报（自然科学版）
2009年 第6期

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部