Title:
スペクトラム拡散受信装置のための同期化ストラテジ及びアーキテクチャ
Document Type and Number:
Japanese Patent JP4690037
Kind Code:
B2
Abstract:
An apparatus for synchronizing the reception of a spread-spectrum signal includes a synchronization apparatus having a code-matched filter, a running average unit coupled to the filter, a peak detector coupled to the running average unit, and a synchronizer coupled to the peak detector for providing an index of a peak. A corresponding method includes receiving a spread-spectrum signal having a period comprising a plurality of indexable samples, maintaining a mean array comprising a running mean value for each indexable sample over a variable number of periods, detecting a peak value of the array, calculating an average value of the array, computing a peak-to-average ratio in accordance with the detected peak value and the calculated average value, comparing the peak-to-average ratio against a time-varying threshold, and synchronizing the received signal when the peak-to-average ratio exceeds the current value of the threshold.
Inventors:
Marguets, adam, robert
Littwin, Lewis, Robert
Littwin, Lewis, Robert
Application Number:
JP2004524691A
Publication Date:
June 01, 2011
Filing Date:
July 22, 2003
Export Citation:
Assignee:
Thomson Licensing
International Classes:
H04L7/00; H04B1/707; H04W56/00; H04W76/02
Domestic Patent References:
| JP20017734A | ||||
| JP2001267966A | ||||
| JP2002101069A | ||||
| JP2001268041A | ||||
| JP1098412A | ||||
| JP2000358266A | ||||
| JP2001145151A |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito