Low complexity PTS scheme for PAPR reduction of OFDM signals

被引：1
|
作者：
Wang J.-X. [1 ]
Wu X.-C. [1 ]
Mao Z.-G. [1 ]
Zhou B. [1 ]
机构：
[1] Microelectronics Center, Harbin Institute of Technology
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2010年 / 37卷 / 02期
关键词：
Low complexity; Orthogonal frequency division multiplexing (OFDM); Partial transmit sequence (PTS); Peak-to-average power ratio (PAPR);
D O I：
10.3969/j.issn.1001-2400.2010.02.026
中图分类号：
学科分类号：
摘要：
A low complexity partial transmit sequence (PTS) scheme is proposed to improve the performance of the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. By analyzing the characteristic of candidate signals, the number of phase factor vectors is reduced from 64 to 16 without the loss of PAPR performance and the search time of the phase factor is reduced. The hardware cost of the IFFT unit can be reduced by adopting the group concept, rescheduling the time of the multiplication with twiddle factors, and using path-based constant multipliers instead of complex multipliers. In the IFFT unit, the hardware costs of complex multipliers, complex adders, and registers are respectively reduced by 58.8%, 28.6%, and 75.6% compared with four independent IFFT processors with radix 23 and single-path delay feedback. In addition, there is no need for ROM to store the twiddle factor. Moreover, because of the characteristic of the needed phase factor vectors, the hardware overhead of the optimization unit can be lessened.
引用
收藏
页码：326 / 333
页数：7
相关论文
共 16 条
  • [1] Jiang T., Wu Y.Y., An overview: Peak-to average power ratio reduction techniques for OFDM signals, IEEE Trans on Broadcasting, 54, 2, pp. 257-268, (2008)
  • [2] Gross R., Veeneman D., Clipping distortion in DMT ADSL systems, IEEE Electron Lett, 29, pp. 2080-2081, (1993)
  • [3] Wang J., Zhou X., Xu Y., Et al., Performance improvement of OFDM-ROF system with clipping and filtering technique, IEEE Trans on Consumer Electronics, 54, 2, pp. 296-299, (2008)
  • [4] Aburakhia S.A., Badran E.F., Mohamed D.A.E., Linear companding transform for the reduction of peak-to-average power ratio of OFDM signals, IEEE Trans on Broadcasting, 55, 1, pp. 155-160, (2009)
  • [5] Tsai Y., Zhang G., Wang X., Polyphase codes for uplink OFDM-CDMA systems, IEEE Trans on Communications, 56, 3, pp. 435-444, (2008)
  • [6] Goff S.Y.L., Khoo B.K., Tsimenidis C.C., Et al., A novel selected mapping technique for PAPR reduction in OFDM systems, IEEE Trans on Communications, 56, 11, pp. 1775-1779, (2008)
  • [7] Wu X.C., Wang J.X., Mao Z.G., A novel architecture for PAPR reduction of OFDM signals, IEEE International Conference on Communications Systems, pp. 1055-1060, (2008)
  • [8] Yang G., Jiang R., Li Y., Detection of side information for peak-to-average power ratio reduction of the OFDM signal using the suboptimal PTS method, Journal of Xidian University, 32, 5, pp. 671-675, (2005)
  • [9] Cimini L.J., Sollenberger N.R., Peak-to-average power ratio reduction of an OFDM signal using partial transmit sequences, IEEE Communications Letters, 4, 3, pp. 86-88, (2000)
  • [10] Lim D.W., Heo S.J., No J.S., Et al., A new PTS OFDM scheme with low complexity for PAPR reduction, IEEE Trans on Broadcasting, 52, 1, pp. 77-82, (2006)
12