Invention Grant
- Patent Title: Frequency correction circuit, radio receiving apparatus, and frequency correction method
- Patent Title (中): 频率校正电路,无线电接收装置和频率校正方法
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Application No.: US13460683Application Date: 2012-04-30
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Publication No.: US09124451B2Publication Date: 2015-09-01
- Inventor: Junya Tsuchida
- Applicant: Junya Tsuchida
- Applicant Address: JP Kawasaki-Shi, Kanagawa
- Assignee: RENESAS ELECTRONICS CORPORATION
- Current Assignee: RENESAS ELECTRONICS CORPORATION
- Current Assignee Address: JP Kawasaki-Shi, Kanagawa
- Agency: McGinn IP Law Group, PLLC
- Priority: JP2011-102837 20110502
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04L7/00

Abstract:
A radio receiving apparatus according to the present invention receives a preamble signal through one frequency band and also detects a periodic symbol timing in a receiving period of a part of a symbol that composes the preamble signal. A frequency correction circuit includes a generating unit, a detecting unit, and a correction unit. The generating unit generates a detection window of a predetermined time width including each of a first and a second symbol timing that are previously determined among the periodic symbol timings in the receiving period of a remaining symbol that composes the preamble signal. The detecting unit sequentially receives a correlation value between the preamble signal and a reference signal and detects a maximum value from the correlation value input during a period when the detection window is opened. The correction unit corrects a frequency deviation of the one frequency band based on the maximum value.
Public/Granted literature
- US20120281791A1 FREQUENCY CORRECTION CIRCUIT, RADIO RECEIVING APPARATUS, AND FREQUENCY CORRECTION METHOD Public/Granted day:2012-11-08
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