Title:
超高速無線通信を行う受信機側におけるサンプリング周波数および位相オフセットのオンザフライ補償
Document Type and Number:
Japanese Patent JP5476506
Kind Code:
B2
Abstract:
Problem To restore data in a transmitted symbol sequence without aligning the clock of the receiver with the clock of the transmitter. Solution Received data oversampled twice is polyphased by the receiver, feedback is applied using an adaptive algorithm, and the filter coefficients (tap coefficient sequence) of a compensation filter are simultaneously shifted when the data shifts. The sampling frequency and the phase offset can be compensated for on the fly using a filter combining a tapped filter whose initial value is a correlation value obtained from the preamble and header of a received signal, and a wavefront aligner. In this configuration, a resampling filter circuit, an equalization filter circuit and a decimation filter circuit are realized in a single compensation filter circuit, which is much smaller than the prior art circuits in terms of size.
Inventors:
Daiki Nakano
Yasunao Katayama
Yasuteru Koda
Yasunao Katayama
Yasuteru Koda
Application Number:
JP2013503507A
Publication Date:
April 23, 2014
Filing Date:
March 02, 2012
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MACHINES CORPORATION
International Classes:
H04B7/005; H04L27/34
Domestic Patent References:
| JP2003032313A | 2003-01-31 | |||
| JPH07115446A | 1995-05-02 | |||
| JPH05260108A | 1993-10-08 | |||
| JPH0722988A | 1995-01-24 | |||
| JPH10341193A | 1998-12-22 | |||
| JP2003032313A | 2003-01-31 | |||
| JPH07115446A | 1995-05-02 | |||
| JPH05260108A | 1993-10-08 | |||
| JPH0722988A | 1995-01-24 | |||
| JPH10341193A | 1998-12-22 |
Attorney, Agent or Firm:
Takeshi Ueno
Tasaichi Tanae
Tasaichi Tanae