ADAPTIVE USE OF POLARIZATION AS A MEANS OF INCREASED WIRELESS CHANNEL CAPACITY
First Claim
1. A communication system, comprising:
- (a) a mobile unit operatively coupled to at least one antenna, said antenna(s) configured to transmit electromagnetic waves having a polarization state fixed with respect to said mobile antenna(s) and receive electromagnetic waves having an arbitrary polarization;
(b) a remote transceiver operatively coupled to a multitude of antennas, said antennas configured to transmit electromagnetic waves having a fixed polarization state with respect to said transceiver and receive electromagnetic waves having an arbitrary polarization;
(c) at least one sensor for sensing the orientation of said mobile unit with respect to a fixed reference frame,(d) a means for using the output of said sensor to resolve the relative orientation of said mobile unit and said remote transceiver,(e) a means for using said relative orientation to decouple incident polarized electromagnetic signals on said antenna(s) of said mobile unit.
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Accused Products
Abstract
A mobile transceiver uses position and/or orientation knowledge to increase the capacity of a wireless link by transmitting over multiple electromagnetic polarizations. Sensors may include accelerometers, compasses, position sensors such as GPS receivers, and other means of determining the relative orientation of a mobile tranceiver to its base station. This information is used to properly shape transmitted signals and correlate received signals to increase the link capacity of the wireless link, either through channel multiplexing or increased link quality. This is particularly useful for mobile phones used on cellular networks utilizing high data volume on the allocated spectrum.
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Citations
8 Claims
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1. A communication system, comprising:
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(a) a mobile unit operatively coupled to at least one antenna, said antenna(s) configured to transmit electromagnetic waves having a polarization state fixed with respect to said mobile antenna(s) and receive electromagnetic waves having an arbitrary polarization; (b) a remote transceiver operatively coupled to a multitude of antennas, said antennas configured to transmit electromagnetic waves having a fixed polarization state with respect to said transceiver and receive electromagnetic waves having an arbitrary polarization; (c) at least one sensor for sensing the orientation of said mobile unit with respect to a fixed reference frame, (d) a means for using the output of said sensor to resolve the relative orientation of said mobile unit and said remote transceiver, (e) a means for using said relative orientation to decouple incident polarized electromagnetic signals on said antenna(s) of said mobile unit. - View Dependent Claims (2, 3, 4)
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5. A method of increasing wireless channel capacity of a transceiver, comprising:
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(a) providing at least one orientation sensor for said transceiver, (b) providing at least one antenna for said transceiver with a known polarization relative to said transceiver, (c) providing a means for communication using electromagnetic waves with a base station, where said base station consists of a second transceiver with a plurality of antennas with a known polarization relative to said base station, (d) producing at least one measurement for said transceiver orientation relative to a fixed reference frame, (e) producing an estimate for the relative orientation of said transceiver and said base station using said measurement(s), (f) isolating and receiving electromagnetic transmissions transmitted by said base station at different polarizations using said relative orientation estimate, whereby channel capacity can be increased by correlating incident signals with their expected polarization. - View Dependent Claims (6, 7, 8)
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Specification