Title:
基準シンボルレートのナイキスト周波数よりも大きなオフセットを有するTDMA信号のための、繰り返しによるパイロット信号を用いた周波数オフセット推定及びC/I比計測法
Document Type and Number:
Japanese Patent JP5344825
Kind Code:
B2
Abstract:
A method and apparatus are provided for decoding a wireless signal from a set of samples with an embedded training sequence. The method includes the steps of determining a first frequency offset from the samples where the first frequency offset is assumed to be less than a Nyquist frequency of the training sequence and calculating a first carrier to interference ratio based upon the first frequency offset. The method further includes the steps of determining a second frequency offset from the samples by subtracting an absolute value of the first frequency offset from an integer multiple of the Nyquist frequency and giving the second frequency offset a sign opposite that of the first frequency offset, calculating a second carrier to interference ratio based upon the second frequency offset and selecting one of the first and second frequency offsets based upon a relative values of the calculated carrier to interference ratios.
Inventors:
Bikashu Srivastaba
Men Cheng
Men Cheng
Application Number:
JP2008022747A
Publication Date:
November 20, 2013
Filing Date:
February 01, 2008
Export Citation:
Assignee:
PC-Tell, Inc.
International Classes:
H04L7/00; H04B1/7087; H04B7/005; H04J3/00
Domestic Patent References:
| JP2003060649A | ||||
| JP2006180518A | ||||
| JP2007166173A |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu