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US 2002/0172261 A1Published application
Robust, low complexity communications system with interference mitigation
AssigneeGeneral Electric Company
InventorsJohn Erik Hershey, Ralph Thomas Hoctor
Life of this patent
Estimating the term…
Abstract
A system for short range communications includes a transmitter capable of transmitting a colored noise-like preamble. A receiver receives the colored noise-like preamble and the receiver includes an antenna with an antenna pattern. A direction of the antenna is controllable by the receiver. A signal processor is connected to and responsive to the receiver. The signal processor detects and estimates the strength of the colored noise-like preamble.
Claims18
A communications system comprising:
- a transmission unit comprising:
- a noise source for generating a noise signal;
- a signal generator connected to the noise generator and generating a colored noise-like preamble from at least the noise signal;
- a modulator connected to the signal generator for modulating the colored noise-like preamble;
- a switching device having at least a first input, a second input and an output, the first input being connected to the modulator;
- an ISM spread spectrum modulator connected to the second input of the switching device and providing an ISM transmission signal;
- and
- a transmitter connected to the output of the switching device wherein when the switching device is a first position the colored noise-like preamble is provided as a transmitter output signal and when the switching device is in a second position the ISM transmission signal is provided as the transmitter output signal wherein the colored noise-like preamble is transmitted by the transmitter before the ISM transmission signal;
- a receiving unit comprising:
- an antenna for receiving the transmitter output signal transmitted by the transmission unit, the antenna adjusting an antenna pattern for improving reception of the transmitter output signal by the transmission unit;
- a signal processor connected to the antenna, the antenna producing an antenna output signal including the antenna pattern and the transmitter output signal, the signal processor evaluating the antenna output signal and determining at least the presence of the colored noise-like preamble in the antenna output signal.
8 more elements
A system for short range communications comprising:
- a transmitter capable of transmitting a colored noise-like preamble;
- a receiver for receiving the colored noise-like preamble and including an antenna with an antenna pattern, a direction of the antenna being controllable by the receiver;
- and
- a signal processor connected and responsive to the receiver for detecting and estimating the strength of the colored noise-like preamble.
1 more element
A system for short range communications comprising:
- a transmitter capable of transmitting a colored noise-like preamble;
- a receiver for receiving the colored noise-like preamble and including at least two antennas having at least two output signals, wherein each of the two output signals are independently provided;
- and
- a signal processor connected to the receiver and combining the at least two antenna output signals.
1 more element
Dependencies are inferred from the claim text.