Abstract: In one embodiment, a method includes receiving a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device.

Abstract: In one embodiment, a method includes receiving a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device.

Abstract: In one embodiment, an apparatus includes a processor for processing a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device, and memory for storing the subcarrier phases and the feature vector.

Abstract: In one embodiment, an apparatus includes a processor for processing a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device, and memory for storing the subcarrier phases and the feature vector.

Abstract: In one embodiment, an apparatus includes a plurality of antennas, a receiver in communication with said plurality of antennas for receiving one or more packets in a block based modulation environment, a switch interposed between a portion of the antennas and the receiver for switching between the antennas, and a processor for calculating angle of arrival for use in identifying a location of a mobile device transmitting the one or more packets.

Abstract: In one embodiment, an apparatus includes a plurality of antennas, a receiver in communication with said plurality of antennas for receiving one or more packets in a block based modulation environment, a switch interposed between a portion of the antennas and the receiver for switching between the antennas, and a processor for calculating angle of arrival for use in identifying a location of a mobile device transmitting the one or more packets.

Abstract: A method and system for monitoring electronic transactions, such as credit card transactions, to determine whether associated transaction costs, such as interchange fees, are being properly qualified. This is accomplished by monitoring for a “spike” in interchange qualifications and generating an alert when one or more spikes are detected. Spikes in interchange qualifications are defined as a variation in interchange qualifications compared with an historical level. The method and system may also monitor changes in cost or efficiency for other types of transactions in which the cost or efficiency of the transaction is based directly upon one or more variables.

Abstract: A method and system for monitoring electronic transactions, such as credit card transactions, to determine whether associated transaction costs, such as interchange fees, are being properly qualified. This is accomplished by monitoring for a “spike” in interchange qualifications and generating an alert when one or more spikes are detected. Spikes in interchange qualifications are defined as a variation in interchange qualifications compared with an historical level. The method and system may also monitor changes in cost or efficiency for other types of transactions in which the cost or efficiency of the transaction is based directly upon one or more variables.

Abstract: A method and system for monitoring electronic transactions, such as credit card transactions, to determine whether associated transaction costs, such as interchange fees, are being properly qualified. This is accomplished by monitoring for a “spike” in interchange qualifications and generating an alert when one or more spikes are detected. Spikes in interchange qualifications are defined as a variation in interchange qualifications compared with an historical level. The method and system may also monitor changes in cost or efficiency for other types of transactions in which the cost or efficiency of the transaction is based directly upon one or more variables.

Abstract: A sample apparatus for a chromatogram utilizes a calibrated sample holding device such as a burette, having a liquid level sensor located at a selected height on the sample holding device. A pump is provided for transporting liquid to the sample holding device. A switch, which may be integrated with the liquid level sensor, connected to the pump such that when the selected liquid level is reached, the switch halts the flow of liquid to the sample holding device. Optionally, a second transport device provided for discharging the sample, with the second transport device utilizing an outlet valve responsive to a signal from a controller such that the sample holding device can be cyclically filled and emptied, in a sequence satisfactory to efficient operation of the chromatograph. Utilizing the apparatus of the invention, precise volumetric samples can be delivered to the device, to assure consistent analytical results from sample to sample.