BACKGROUND Various electrical devices emit radio signals. For example, communications
radios, emergency safety beacons, radars, television broadcast towers, wireless access …

BACKGROUND 0003 Direction finding (DF) can refer to an estimation of a direction of arrival
(DOA) for a given signal that is inter cepted. The purpose of DF systems is to locate the …

A system detects the location of an uncooperative emitter by measuring the power level in
an RF signal using a grid of linear antennas. The linear antennas are arranged in an x, y …

BACKGROUND Personal wireless electronic devices have become ubiqui tous. Many of
these devices use more than one wireless pro tocol to connect to the outside world, such as …

BACKGROUND It is often required to determine the location of an RF emitter for various
purposes. For example, in an emergency situation Such as a fire or earthquake, people in …

BACKGROUND A mobile device can communicate wirelessly with a wire less
communication network by employing radio frequency (RF) field propagation. The radio …

(51) Int. Cl antenna signals. A coupler and antenna signal phase and tion iM40(2015.01)
magnitude measurement circuitry may be used to determine HOIO I/24(200601) when …

BACKGROUND EAS and RFID systems are typically utilized to protect and/or track assets. In
an EAS system, an interrogation Zone may be established at the perimeter, eg at an exit …

SUMMARY OF THE INVENTION A method, according to various aspects of the present
invention, for determining whether an identification device is detected, includes:(a) selecting …

In a traditional mobile telecommunication network, mobile stations (eg, mobile phones)
communicate via an air link with a stationary base transceiverstation (BTS), typically a tower …