中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Grant
US08351520B2 Dynamically selecting methods to reduce distortion in multi-carrier modulated signals resulting from high peak-to-average power ratios 有权
动态选择减少高峰值与平均功率比导致的多载波调制信号失真的方法

  • Patent Title: Dynamically selecting methods to reduce distortion in multi-carrier modulated signals resulting from high peak-to-average power ratios
  • Patent Title (中): 动态选择减少高峰值与平均功率比导致的多载波调制信号失真的方法
  • Application No.: US12377192
    Application Date: 2007-09-19
  • Publication No.: US08351520B2
    Publication Date: 2013-01-08
  • Inventor: Graeme K. Woodward
  • Applicant: Graeme K. Woodward
  • Applicant Address: US PA Allentown
  • Assignee: Agere Systems LLC
  • Current Assignee: Agere Systems LLC
  • Current Assignee Address: US PA Allentown
  • Agency: Mendelsohn, Drucker & Associates, P.C.
  • Agent Craig M. Brown; Steve Mendelsohn
  • International Application: PCT/US2007/078879 WO 20070919
  • International Announcement: WO2008/036730 WO 20080327
  • Main IPC: H04L27/28
  • IPC: H04L27/28 ;  H04K1/10
Dynamically selecting methods to reduce distortion in multi-carrier modulated signals resulting from high peak-to-average power ratios
Abstract:
In one embodiment, an algorithm dynamically selects a method for reducing distortion in a multi-carrier modulated signal, such as an orthogonal frequency division multiplexing (OFDM) signal. The algorithm directs a transmitter to transmit peak-to-average power ratio (PAPR)-reduction signals over reserved tones (i.e., frequencies) if reserved tones are available. If reserved tones are not available, then the algorithm directs the transmitter to transmit PAPR-reduction symbols over free tones if free tones are available. If the free tones for this transmitter are used by adjacent transmitters, then interference-reduction techniques may be used to reduce interference with the adjacent transmitters. If reserved tones and free tones are not available, then the transmitter may use an alternative method to reduce distortion, such as successive clipping and filtering. In another embodiment, the transmitter may transmit PAPR-reduction symbols over both free and reserved tones, if available.
Abstract(Chinese):

在一个实施例中，算法动态地选择减少诸如正交频分复用（OFDM）信号的多载波调制信号中的失真的方法。 如果保留的音调可用，该算法指示发射机在保留的音调（即，频率）上发射峰均功率比（PAPR） - 减小信号。 如果保留的音调不可用，则如果可用音调可用，则算法指示发射机在自由音调上发送PAPR减少符号。 如果该发射机的自由音由相邻发射机使用，则可以使用干扰减少技术来减少与相邻发射机的干扰。 如果保留的音调和自由音调不可用，则发射机可以使用替代方法来减少失真，例如连续的削波和滤波。 在另一个实施例中，如果可用，发射机可以在自由和保留的音调两者之间传送PAPR减少符号。

Public/Granted literature
Information query
Espacenet
Patent Agency Ranking
0/0