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1. 发明授权

US5394441A Method and apparatus for digitally tracking highs and lows of a signal received by a radio communication device 失效
标题翻译：用于数字跟踪由无线电通信设备接收的信号的高和低的方法和装置
公开(公告)号：US5394441A
公开(公告)日：1995-02-28
申请号：US013855
申请日：1993-02-05
申请人： Daniel A. Morera , David R. Petreye
发明人： Daniel A. Morera , David R. Petreye
IPC分类号： H04L25/06 , H04L25/10
CPC分类号： H04L25/068
摘要： A method for tracking a received signal comprises the steps of setting (635) a counter (130) to a first value indicative of a first signal voltage, determining a center threshold of the received signal, and determining a number of center transitions of the received signal within a predetermined time period. The method further comprises the step of automatically decrementing (685, 695) the counter (130) to a second value indicative of a second signal voltage in response to expiration of a predetermined amount of time, wherein the second value differs from the first value by a predetermined amount determined by the number of center transitions of the received signal within the predetermined time period.
摘要翻译：用于跟踪接收信号的方法包括以下步骤：将计数器（130）设置为指示第一信号电压的第一值，确定接收信号的中心阈值，以及确定接收到的信号的中心转换次数信号在预定时间段内。该方法还包括响应于预定时间量的期满而将计数器（130）自动递减（685,695）到指示第二信号电压的第二值的步骤，其中第二值与第一值不同，由预定时间段内的接收信号的中心跃迁数确定的预定量。

2. 发明授权

US5311554A Synchronized offset extraction in a data receiver 失效
标题翻译：数据接收器中的同步偏移提取
公开(公告)号：US5311554A
公开(公告)日：1994-05-10
申请号：US907965
申请日：1992-07-02
申请人： Daniel A. Morera , David R. Petreye
发明人： Daniel A. Morera , David R. Petreye
IPC分类号： G08B5/22 , H04L25/06 , H04W88/02 , H03K9/00 , H04L27/06 , H04L
CPC分类号： H04W88/026 , G08B5/227 , H04L25/062 , H04L25/066 , H04L27/106
摘要： A selective call receiver (106) receives a radio frequency signal having digital signals contained within symbols. The signal demodulated by the receiver (804) comprises a substantially constant DC offset voltage and an AC voltage (1810) indicative of the information contained within the symbols. A threshold level extraction circuit (808) which extracts the offset voltage is synchronously controlled (1840) providing for sampling of the received signal by the threshold level extraction circuit in substantially the center of each symbol.
摘要翻译：选呼接收机（106）接收具有包含在符号内的数字信号的射频信号。由接收器（804）解调的信号包括基本恒定的DC偏移电压和指示包含在符号内的信息的AC电压（1810）。提取偏移电压的阈值电平提取电路（808）被同步控制（1840），提供阈值电平提取电路在每个符号的大致中心处对接收信号的采样。

3. 发明授权

US5303416A Method and apparatus for adjusting peak and valley acquisition rates of a signal received by a radio communication device 失效
标题翻译：用于调整由无线电通信设备接收的信号的峰谷收集速率的方法和装置
公开(公告)号：US5303416A
公开(公告)日：1994-04-12
申请号：US6599
申请日：1993-01-21
申请人： Daniel A. Morera
发明人： Daniel A. Morera
IPC分类号： G08B3/10 , H04B1/16 , H04L25/06 , H04B1/10 , G08B5/22
CPC分类号： G08B3/1016 , H04B1/16 , H04L25/062
摘要： A radio communication device (100) for receiving a signal comprises tracking circuitry (115) for tracking the signal to acquire peak and valley values of the signal, a threshold detector (150) coupled to the tracking circuitry (115) for determining a center threshold of the signal, and an edge detector (180) coupled to the threshold detector (150) and the tracking circuitry (115) for determining a number of center transitions of the signal in a predetermined time period. The radio communication device (100) further comprises a rate controller (185) coupled to the edge detector (180) and the tracking circuitry (115) for receiving the number of center transitions and for adjusting an acquisition rate with which the peak and valley values are acquired in accordance with the number of center transitions.
摘要翻译：一种用于接收信号的无线电通信设备（100）包括跟踪电路（115），用于跟踪信号以获取信号的峰值和谷值;耦合到跟踪电路（115）的阈值检测器（150），用于确定中心阈值以及耦合到所述阈值检测器（150）和所述跟踪电路（115）的边缘检测器（180），用于在预定时间段内确定所述信号的中心跃迁的数量。无线电通信设备（100）还包括耦合到边缘检测器（180）和跟踪电路（115）的速率控制器（185），用于接收中心跃迁的数量并且用于调整采集速率，峰值和谷值根据中心过渡的数量被采集。

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