Invention Grant
- Patent Title: Mobile communication system, and base transceiver station apparatus and mobile station apparatus used in mobile communication system
- Patent Title (中): 移动通信系统,移动通信系统中使用的基站装置和移动站装置
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Application No.: US11311564Application Date: 2005-12-19
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Publication No.: US08179926B2Publication Date: 2012-05-15
- Inventor: Tetsuhiro Futami , Morihiko Minowa
- Applicant: Tetsuhiro Futami , Morihiko Minowa
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Katten Muchin Rosenman LLP
- Priority: JP2005-268556 20050915
- Main IPC: H04J3/06
- IPC: H04J3/06 ; H04W4/00 ; H04L27/06

Abstract:
A phase error detector in a base transceiver station detects a phase error caused by a Doppler shift in a received wave from a mobile station. A phase rotator rotates a phase of a transmission symbol in a base band region so as to cancel the Doppler shift, which occurs in a downlink from a base transceiver station to a mobile station based on the phase error detected by the phase error detector.
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