Invention Grant
- Patent Title: Detecting apparatus, calculating apparatus, measurement apparatus, detecting method, calculating method, transmission system, program, and recording medium
- Patent Title (中): 检测装置，计算装置，测量装置，检测方法，计算方法，传输系统，程序和记录介质
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Application No.: US12424543Application Date: 2009-04-16
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Publication No.: US08306132B2Publication Date: 2012-11-06
- Inventor: Takafumi Aoki , Takahiro Yamaguchi , Katsuhiko Degawa
- Applicant: Takafumi Aoki , Takahiro Yamaguchi , Katsuhiko Degawa
- Applicant Address: JP Tokyo
- Assignee: Advantest Corporation
- Current Assignee: Advantest Corporation
- Current Assignee Address: JP Tokyo
- Agency: Jianq Chyun IP Office
- Main IPC: H04L27/28
- IPC: H04L27/28
Abstract:
Provided is a detection apparatus that detects a phase alignment error between transmission signals transmitted on different channels, comprising a correlation calculating section that calculates a cross-spectrum between the transmission signals based on a result of a measurement of the transmission signals transmitted in the channels; a phase difference calculating section that calculates a phase difference spectrum between the transmission signals based on the cross-spectrum calculated by the correlation calculating section; and a detecting section that detects a difference between transmission times of the transmission signals transmitted on the different channels and a phase offset between the transmission signals, based on the phase difference spectrum calculated by the phase difference calculating section.
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