公开(公告)号：CA1126865A

公开(公告)日：1982-06-29

申请号：CA332985

申请日：1979-08-01

Applicant: MOTOROLA INC

Inventor： BACKOF CHARLES A JR ,  ROBINS DAVID S

IPC: H04L27/14 ,  G01R23/167 ,  G01R25/00 ,  H03H17/00 ,  H03K9/04 ,  H04L27/00 ,  H04L27/26 ,  H04Q1/457 ,  H04Q9/10

Abstract: PROGRAMMABLE DIGITAL TONE DETECTOR A plurality of up/down counters are controlled by a programmed digital reference signal. The combination of a high select signal and a high input signal causes any one of the counters to increment (up) by one count while a combination of a high select signal and a low input signal causes any one of the counters to decrement (down) one count. A threshold detector signals an output when a specific combination of the counters reaches a predetermined combination count signifying correlation of the programmed reference with the input tone over a predetermined number of cycles. The phase of the input may be determined by noting which of the counters reaches the predetermined threshold.

公开(公告)号：CA1125393A

公开(公告)日：1982-06-08

申请号：CA333861

申请日：1979-08-16

Applicant: MOTOROLA INC

Inventor： SUMNER TERENCE E ,  BACKOF CHARLES A JR

IPC: H04L25/40 ,  G01R23/15 ,  H04L1/20 ,  H04L7/033 ,  H04L25/02 ,  H04Q1/448 ,  H04B1/10

Abstract: A digital signal detector is disclosed that detects a serial bit stream transmitted at a predetermined bit frequency. Bit transitions are totallized in a counter over a predetermined time interval. Bit transitions occurring during a good window interval increment the totallized count by one. Bit transitions occurring during a bad window interval decrement the totallized count by one. Bit transitions occurring during a marginal window interval, situated between the good and bad window intervals, do not affect the totallized count. If the counter reaches a predetermined count during the time interval, a detect signal is provided indicating that the digital signal has been detected. The counter can be further loaded with a threshold count for tailoring the digital signal detector for operation at a particular signal-to-noise ratio. Periodic signals that have frequencies that are submultiples of the bit frequency are detected by correlating the digital signal between two predetermined stages of a shift register. The digital signal detector may provide a detector output signal when both the digital signal is detected and periodic signals having submultiple frequencies are not present.

公开(公告)号：WO2008091420A2

公开(公告)日：2008-07-31

申请号：PCT/US2007081709

申请日：2007-10-18

Applicant: MOTOROLA INC ,  ECKLUND LAWRENCE M ,  VANNATA LOUIS J ,  GROSSPIETSCH JOHN K ,  BACKOF CHARLES A JR

Inventor： GROSSPIETSCH JOHN K ,  BACKOF CHARLES A JR

IPC: H04B15/00 ,  H04B17/00

CPC classification number: H04B1/005

Abstract: Performance of a radio device is optimized by estimating if the device is inside a building. One or more sensors on the radio device are use to measure an environmental quantities relating to the environment of the radio device. The likelihood of the radio device being inside a building is inferred from these measurements. The operation of the radio device then is controlled accordingly. For example, if the radio device is determined to be inside a building, a low operating frequency may be selected for the radio device if a wide area network connection is required, while a high operating frequency may be selected if a local connection is required. An environmental quantity may be, for example, a satellite signal, ambient light, temperature, RF energy, or the response to a test signal emitted by the radio device.

Abstract translation: 通过估计设备是否在建筑物内部来优化无线电设备的性能。 无线电设备上的一个或多个传感器用于测量与无线电设备的环境有关的环境数量。 从这些测量推断出无线电设备在建筑物内的可能性。 然后相应地控制无线电设备的操作。 例如，如果无线电设备被确定在建筑物内部，则如果需要广域网络连接，则可以为无线电设备选择低操作频率，而如果需要本地连接，则可以选择高操作频率。 环境量可以是例如卫星信号，环境光，温度，RF能量或对由无线电设备发射的测试信号的响应。