Invention Grant
US08149142B2 Adaptive range vehicle locating unit, vehicle tracking unit and vehicle recovery system including same 有权
自适应范围车辆定位单元,车辆跟踪单元和包括其的车辆恢复系统

Adaptive range vehicle locating unit, vehicle tracking unit and vehicle recovery system including same
Abstract:
An adaptive range vehicle recovery system including an adaptive range vehicle locating unit including a narrowband baseband generator for generating a narrowband signal, a wideband baseband generator for generating a wideband signal, a timing control circuit responsive to an activation signal to transmit, alternately, said narrowband signal at a first rate, and said wideband signal at a second rate and responsive to a track signal to transmit one of said wideband and narrowband signals at a third, different, rate; and also to an adaptive range vehicle recovery system including an adaptive range vehicle track unit including a data decoder including, a wideband decoder for detecting data from a wideband baseband signal, a narrowband decoder for detecting data from a narrowband baseband signal, a bandwidth detector responsive to a received signal to distinguish narrowband and wideband signals and an input switching circuit responsive to said bandwidth detector for directing the wideband signal to the wideband decoder and the narrowband signal to the narrowband decoder.
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