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1. 发明专利

CA2086644A1 FREQUENCY SWEEP CONTROL APPARATUS 未知
公开(公告)号：CA2086644A1
公开(公告)日：1993-07-11
申请号：CA2086644
申请日：1993-01-04
申请人： NEC CORPORATION
发明人： KONO, SHINICHI
IPC分类号： H03J1/00 , H03J7/26 , H04L7/04 , H04B1/18
摘要： A frequency sweep control apparatus includes a variable frequency oscillator, a demodulator, a unique word signal detector, a sweep range controller, and a frequency controller. The variable frequency oscillator is capable of controlling an oscillation frequency. The demodulator demodulates a reception intermediate frequency signal by using an output from the variable frequency oscillator. The unique word signal detector detects a unique word signal in the reception signal from a demodulated output from the demodulator 102 and outputs a detection signal indicating a unique word signal detected state in which the unique word signal is detected or a unique word signal non-detected state in which the unique word signal is not detected. The sweep range controller controls a sweep range on the basis of an output from the unique word signal detector. The frequency controller controls the oscillation frequency of the variable frequency oscillator on the basis of an output from the sweep range controller.

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