Abstract: A duty cycle management system and method for use in a wireless device having a transmitter which transmits packets in the form of individual packets and/or packet bursts. A controller in combination with an instruction set limits the number of packets transmitted during each time period defined by one time window or adjacent time windows, on a sliding basis, so as to control the duty cycle of transmissions during successive adjacent time windows based on the transmitter's output power, to produce that average power output. The transmission of packets is thereby delayed as needed to establish sufficient idle period(s) during one time window or adjacent time windows to apply whatever duty cycle is needed to produce that average power output level limit for the transmitter.

Abstract: A combiner for use in a diversity radio receiver (FM) which receives a plurality of diversity I and Q modulated signals each carrying I and Q information signals through spatially separated antennas, the received I and Q signal pairs being digitized at a sampling rate T and converted to baseband I and Q signals. Each converted I and Q signal pair represents a diversity I and Q vector which is input to the combiner. A discriminator is provided for each sample stream of diversity I and Q vectors input to the combiner. Each discriminator produces, for each sample, an output discriminated I and Q vector (I?, Q?) having a phase representative of the frequency of the information signal and an amplitude proportional to the power of the information signal.

Abstract: A duty cycle management system and method for use in a wireless device having a transmitter which transmits packets in the form of individual packets and/or packet bursts. A controller in combination with an instruction set limits the number of packets transmitted during each time period defined by one time window or adjacent time windows, on a sliding basis, so as to control the duty cycle of transmissions during successive adjacent time windows based on the transmitter's output power, to produce that average power output. The transmission of packets is thereby delayed as needed to establish sufficient idle period(s) during one time window or adjacent time windows to apply whatever duty cycle is needed to produce that average power output level limit for the transmitter.

Abstract: A duty cycle management system and method for use in a wireless device having a transmitter which transmits packets in the form of individual packets and/or packet bursts. A controller in combination with an instruction set limits the number of packets transmitted during each time period defined by one time window or adjacent time windows, on a sliding basis, so as to limit the duty cycle of transmissions during successive adjacent time windows to the predetermined duty cycle limit. To do so transmission of packets is delayed as needed to establish sufficient idle period(s) during the one or adjacent time window(s) to maintain the duty cycle within the duty cycle limit.

Abstract: A combiner for use in a spatial diversity radio receiver which receives multiple data signals through spaced apart antennae. The combiner includes a receiving component configured for receiving strength-indicative signals, each strength-indicative signal being indicative of the strength of one of the received data signals, and demodulated data signals. A control signal generating component configured for generating control signals generates control signals responsive to the strength-indicative signals. A combining component configured for combining signals combines, in linear proportions determined by the control signals, those of the demodulated data signals which are both above a predetermined strength threshold level (“combiner threshold”) and differ in strength by less than a predetermined margin of preferably between 3 dB and 12 dB (e.g. 6 dB) to provide a combined output data signal. When more than the margin separates the signal strengths, only the strongest signal is used.

Abstract: A combiner for use in a diversity radio receiver (FM) which receives a plurality of diversity I and Q modulated signals each carrying I and Q information signals through spatially separated antennas, the received I and Q signal pairs being digitized at a sampling rate T and converted to baseband I and Q signals. Each converted I and Q signal pair represents a diversity I and Q vector which is input to the combiner. A discriminator is provided for each sample stream of diversity I and Q vectors input to the combiner. Each discriminator produces, for each sample, an output discriminated I and Q vector (I&Dgr;, Q&Dgr;) having a phase representative of the frequency of the information signal and an amplitude proportional to the power of the information signal.

Abstract: A duty cycle management system and method for use in a wireless device having a transmitter which transmits packets in the form of individual packets and/or packet bursts comprising a predetermined maximum number of contiguous packets. The transmitter has an associated predetermined duty cycle limit for transmission of packets and is operable over a duration measurable as a series of time windows each of which comprises a predetermined number of timeslots with each timeslot having a predetermined nominal duration. Transmission of one packet occupies one timeslot. A controller in combination with an instruction set limits the number of packets transmitted during each time period defined by one time window or adjacent time windows, on a sliding basis, so as to limit the duty cycle of transmissions during successive adjacent time windows to the predetermined duty cycle limit.

Abstract: A modem unit, typically a wireless modem unit, has a bidirectional digital data port, a modem, a transceiver, and a microcontroller programmed to control the unit according to a control program. The modem unit has a command mode, and the microcontroller is programmed to recognize certain commends by means of a prefix as remote commands and retransmit them to a remote modem unit rather than acting on them locally. The microcontroller is also programmed to monitor operating parameters of the modem unit and optionally to insert data relating to these parameters into a prefix to data strings transmitted by the modem unit and strip such prefixes from data strings received by the modem unit. The microcontroller controls switches which determine the routing of data between the port, the modem and the microcontroller so that the above functions may be implemented.