Radio frequency proximity detection and identification...

Details Radio frequency proximity detection and identification... Radio frequency proximity detection and identification...

2003-07-15

2008-12-02

West, Lewis G (Department: 2618)

Telecommunications

Audience survey or program distribution use accounting

C455S066100, C725S012000

Reexamination Certificate

active

07460827

ABSTRACT:
Disclosed herein is a critical band encoding technology (CBET) system having at least one portable people meter (PPM) and a home base station and/or household hub, the CBET system containing a radio frequency (RF) proximity detection and identification system, comprising at least one RF transmitter for receiving a control signal, modulating an RF signal to a present modulation frequency upon receipt of the control signal, and wireless transmitting the modulated signal; and an RF receiver for receiving the wirelessly transmitted modulated signal, determining the modulation frequency, and transmitting the modulation frequency to a remote location, wherein the transmission power of the RF transmitter is preset to transmit the modulated data within a predetermined range.

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