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12. 发明专利

JP3677980B2 Receiving apparatus 失效
标题翻译：空值
公开(公告)号：JP3677980B2
公开(公告)日：2005-08-03
申请号：JP665998
申请日：1998-01-16
申请人：松下電器産業株式会社
发明人：嘉茂 ▲よし▼川 , 良雄堀池
IPC分类号： H04B1/10 , H04B7/26
CPC分类号： Y02D70/00 , Y02D70/40 , Y02D70/449
摘要： PROBLEM TO BE SOLVED: To reduce power consumption by performing carrier sense detection in the state of selecting a variable frequency dividing means to a frequency dividing fraction mode. SOLUTION: A lock detecting means 15 detects that the phase error of a phase comparator 5 falls into a prescribed range. After the start of intermittent operation, a control means 10 monitors a signal from the lock detecting means 15 and when the signal from the lock detecting means 15 is detected, carrier sense operation is performed by operating a carrier sense means 11. When there is a carrier, the control means 10 switches a fractional frequency division/ integral frequency division switching means 9 to integral frequency division. Then, the fractional frequency division/integral frequency division switching means 9 controls the frequency division number of a variable frequency dividing means into a fixed value of 1/N and, simultaneously switches a frequency dividing means 6 so that the output of the frequency dividing means (1/M) 6 is a required value. Thus, the PLL operation of an ordinary integral frequency dividing system is provided. Then, data receiving operation is started and a demodulated output from a transmission/reception means 2 is converted to a data signal and outputted by a waveform shaping means 12.
摘要翻译：要解决的问题：通过在将可变分频装置选择为分频分数模式的状态下进行载波检测来降低功耗。解决方案：锁定检测装置15检测相位比较器5的相位误差落在规定范围内。在间歇操作开始之后，控制装置10监视来自锁检测装置15的信号，并且当检测到来自锁检测装置15的信号时，通过操作载波检测装置11来执行载波侦听操作。当存在载波，控制装置10将分数/分频/积分分频切换装置9切换成积分分频。然后，分数分频/积分分频切换装置9将可变分频装置的分频数控制为固定值1 / N，同时切换分频装置6，使得分频装置的输出（1 / M）6是必需值。因此，提供了普通积分分频系统的PLL操作。然后，开始数据接收操作，并且将来自发送/接收装置2的解调输出转换为数据信号并由波形整形装置12输出。

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