A user can place the multifunctional mobile appliance in a work area bounded by a set of impulse radio, or GPS, transceivers The appliance independently and accurately maps the work area and proceeds to perform one or more tasks over that area, as directed by the user These tasks include, but are not limited to, mowing, vacuuming, scrubbing, waxing, and polishing The user may control, through the World Wide Web, what tasks are performed where and when Both the user and the appliance can make use of services that are provided on the Internet to enhance the performance of the appliance The appliance is safe, silent, self-sufficient, nimble, and non-polluting It is equipped with sensors to enable it to avoid obstacles and other less than optimal operating conditions

Multifunctional mobile appliance

An impulse radio communications system using one or more subcarriers to communicate information from an impulse radio transmitter to an impulse radio receiver. The impulse radio communication system is an ultrawide-band time domain system. The use of subcarriers provides impulse radio transmissions added channelization, smoothing and fidelity. Subcarriers of different frequencies or waveforms can be used to add channelization of impulse radio signals. Thus, an impulse radio link can communicate many independent channels simultaneously by employing different subcarriers for each channel. The impulse radio uses modulated subcarrier(s) for time positioning a periodic timing signal or a coded timing signal. Alternatively, the coded timing signal can be summed or mixed with the modulated subcarrier(s) and the resultant signal is used to time modulate the periodic timing signal. Direct digital modulation of data is another form of subcarrier modulation for impulse radio signals. Direct digital modulation can be used alone to time modulate the periodic timing signal or the direct digitally modulated the periodic timing signal can be further modulated with one or more modulated subcarrier signals. Linearization of a time modulator permits the impulse radio transmitter and receiver to generate time delays having the necessary accuracy for impulse radio communications.

Ultrawide-band communication system and method

An asset, object, person or animal monitoring system and associated method for monitoring assets, objects, people or animals utilizing impulse radio techniques. The asset, object, person or animal monitoring system of the present invention can vary the duty cycles of the impulse radio transmitters, by both manual and automatic means, to adapt to varied requirements.

System and method for monitoring assets, objects, people and animals utilizing impulse radio

A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.

Time domain radio transmission system

The present invention provides for a methods, system, and apparatus relating to data transmission. One method of the present invention includes representing data using at least one ultra wideband pulse, sending the at least one ultra wideband pulse over an electrically conductive guided media, and recovering the data from the at least one ultra wideband pulse. The present invention can be used in conjunction with telephony applications, cable TV applications, power line applications, fiber optic applications, and data bus applications.

High bandwidth data transport system

A communications system wherein an intelligence signal modulates the spacing of relatively narrow pulses of a fixed rate pulse train, and these pulses key on a transmitter which employs a pair of series connected avalanche mode operated transistors. These are repetitively powered via a charged coaxial delay line, and the output, appearing across a resistive load, is fed directly, or through a shaping filter, to a discone transmitting antenna. At a receiving location, the received signal is amplified by a wide band amplifier and fed through a reverse contoured filter (of the transmitting filter, if one is employed). The signal is detected via synchronous detection which locks onto the received pulse train, after which the modulation evidence by the pulse train is recovered by a low pass filter.

Spread spectrum radio transmission system

FIELD: communications engineering SUBSTANCE: pulse signals are time-modulated in time-domain system, multiplied by reference signal, integrated, and then demodulated In the process, useful signals are produced which would be otherwise suppressed by noise EFFECT: improved noise immunity 18 cl, 10 dwgs

Larry W. Fullerton

Papers

Spread spectrum radio transmission system

Time domain radiotransmitting system and radio transmitter