Abstract: A mobile network comprising a central unit (102) for communicating with a first network (104); at least one intermediate base station (106) for communication with the central unit (102) over the first network (104) and for transmitting data to a second network; at least one mobile unit (112) for receiving data from the base station over the second network, a memory for storing the data, a display and a processor running an application to display at least a portion of the stored data; and at least one geolocation marker (116) external to the mobile unit for generating a signal including position information indication a relative position, wherein the signal is received by the mobile unit when it is proximate to the base station wherein the central unit broadcasts at least one portion of the data to the mobile unit through the intermediate base station; and wherein the application running on the processor displays a portion of the stored data associated with the relative position.

Abstract: A single chip radio platform is disclosed for communicating with an RF channel. An RF front end is provided having a receive/transmit capability to receive an RF carrier modulated with digital data and convert the data to analog baseband data, and modulate an RF carrier with baseband data. A digital signal processor (DSP) engine is provided for interfacing with the RF front end to form in conjunction therewith the PHY layer, and interfacing with the MAC layer to demodulate the baseband data and in the transmit mode to generate the baseband data for modulation and transmission by the RF front end. A microcontroller unit (MCU) is provided for performing the functionality of the MAC, network and application layers and interfacing with the DSP.

Abstract: A method is disclosed for controlling the operation of a low power radio platform that realizes the physical layer (PHY) with a software portion and an analog front end, the analog front end disposed between the DSP and an antenna, and realizes the MAC layer with a microcontroller unit (MCU). The DSP, analog front end and MCU are maintained in a low power mode of operation when not in data communication. When data communication is initiated, a hardware controller controls at least one hardware interface disposed between the DSP and the analog front end to initiate multiple time based tasks to transfer data to and from a buffer. During the execution of these tasks, the controller causes a task in the DSP to be initiated for processing of data in the buffers and, upon completion of at least one of the tasks, notifying the MCU of such. The controller controls the hardware interface to terminate operation when predetermined time based events have occurred.

Abstract: A single chip radio platform is disclosed for communicating with an RE channel. An RF front end is provided having a receive/transmit capability to receive an RF carrier modulated with digital data and convert the data to analog baseband data, and modulate an RF carrier with baseband data. A digital signal processor (DSP) engine is provided for interfacing with the RF front end to form in conjunction therewith the PHY layer, and interfacing with the MAC layer to demodulate the baseband data and in the transmit mode to generate the baseband data for modulation and transmission by the RF front end. A microcontroller unit (MCU) is provided for performing the functionality of the MAC, network and application layers and interfacing with the DSP.

Abstract: A method is disclosed for controlling the operation of a low power radio platform that realizes the physical layer (PHY) with a software portion and an analog front end, the analog front end disposed between the DSP and an antenna, and realizes the MAC layer with a microcontroller unit (MCU). The DSP, analog front end and MCU are maintained in a low power mode of operation when not in data communication. When data communication is initiated, a hardware controller controls at least one hardware interface disposed between the DSP and the analog front end to initiate multiple time based tasks to transfer data to and from a buffer. During the execution of these tasks, the controller causes a task in the DSP to be initiated for processing of data in the buffers and, upon completion of at least one of the tasks, notifying the MCU of such. The controller controls the hardware interface to terminate operation when predetermined time based events have occurred.

Abstract: The present invention comprises an automatic gain controller for an RF transceiver that comprises a digital engine that selects a gain level responsive to a signal power level of a signal of interest received by the RF transceiver. The digital engine is configured to select the gain level from a plurality of possible gain levels to maximize the signal power of the signal of interest while providing at least a selected signal of interest to noise ratio. The digital engine provides a control signal enabling amplification of a received signal according to the selected gain level.

Abstract: An RF interface for interfacing between a differential transceiver and at least two antenna ports, which transceiver has at least two receive inputs for receiving RF signals from the at least two antenna ports and at least two transmit outputs for transmitting RF signals to the at least two antenna ports. A multiplexing device is provided for interfacing between the transceiver and the at least two antenna ports and selectively interface transmitted RF signals to one or both of the at least two antenna ports or selectively interface received signals from one or both of the at least two antenna ports to respective receive inputs of the transceiver.

Abstract: A method is disclosed for filtering a received RF signal modulated with a time series sampled data signal, each data sample occurring within a bit time. At least a portion of the signal is filtered such that in the frequency domain a portion of the high frequency energy therein is rejected to provide a filtered signal. In the time domain, substantial attenuation regions are disposed forward in time with the step of filtering such that the attenuation regions are disposed within the bit time of subsequent data samples of the time series sampled data signal in the time domain. Sampling of a given filtered received time series sampled data signal occurs substantially proximate in time to the substantial attenuation contributed by prior received data samples.

Abstract: An apparatus and method for comparing the amplitudes of two electric signals Iout and Qout are disclosed. The method includes a step wherein powers conveyed by the signals Iout and Qout are compared. One feature of the method and apparatus is that it is not necessary to storing the maxima of the signals to be compared when these signals are out of phase with respect to each other. One application of the method or apparatus is for the correction of differences in amplitude between I, Q signals that are separated in phase by 90° inside QAM, QPSK or QBSK demodulators.

Abstract: The invention relates to an amplification device AD, comprising a first and a second amplifier AMP1 and AMP2, arranged in cascade, each amplifier being provided with a feedback loop Zi (where i=1 or 2) and having a gain proper Gi equal to Ai/(1+Ai.Zi). In accordance with the invention, the value of the inverse of the gain proper Gi of the first amplifier AMP1 is substantially equal to three times the value of the inverse of the gain proper G2 of the second amplifier AMP2 raised to the power of three: (1/G1)=3/(G2)3. Such a choice provides the amplification device AD with an optimum linearity.

Abstract: The invention relates to an amplification circuit AC comprising a plurality of amplification branches (Di, Hi, ai, where i=1 to N), each one of the branches having a gain proper that makes a contribution to the overall gain of the amplification circuit AC, the size of said contribution being determined by a control signal CNT.

Abstract: The invention relates to an amplification device AD, comprising a first and a second amplifier AMP1 and AMP2, arranged in cascade, each amplifier being provided with a feedback loop Zi (where i=1 or 2) and having a gain proper Gi equal to Ai/(1+Ai.Zi). In accordance with the invention, the value of the inverse of the gain proper Gi of the first amplifier AMP1 is substantially equal to three times the value of the inverse of the gain proper G2 of the second amplifier AMP2 raised to the power of three: (1/G1)=3/(G2)3. Such a choice provides the amplification device AD with an optimum linearity.