发明名称 |
Two-way pager with transmit threshold |
摘要 |
Application of power to a transmitter in a messaging device is preceded by measuring a quality of at least one base station down-link signal received by a receiver in the device, and producing a transmit threshold signal when the measured signal quality corresponds to a substantial likelihood of accurate detection by a base station of an up-link signal to be transmitted from the device. The device transmitter is powered on only if the transmit threshold signal is present over a given interval prior to a transmitter operation. Thus, a relatively low-power battery and small antenna can be used effectively by the device, and its overall size kept at a minimum.
|
申请公布号 |
US6006068(A) |
申请公布日期 |
1999.12.21 |
申请号 |
US19980005674 |
申请日期 |
1998.01.12 |
申请人 |
MOTOROLA, INC. |
发明人 |
ELKIN, KENNETH CHARLES;CHRISTMAS, CRAIG J.;BENNETT, LEONARD WAYNE |
分类号 |
H04B7/185;H04B17/00;(IPC1-7):H04B7/00 |
主分类号 |
H04B7/185 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|