US 7,068,715 B2Granted

Ultra-wideband communications system and method using a delay hopped, continuous noise transmitted reference

AssigneeGenral Electric Company

InventorsRalph Thomas Hoctor, David Michael Davenport, Aaron Mark Dentinger, Nick Andrew VanStralen, Harold Woodruff Tomlinson, Jr., Kenneth Brakeley Welles, II, John Erik Hershey

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Abstract

An ultra-wideband (UWB) communications system combines the techniques of a transmitted reference (TR) and a multiple access scheme called delay hopping (DH). Combining these two techniques using UWB signaling using a continuous noise transmitted waveform avoids the synchronization difficulties associated with conventional approaches. This TR technique is combined with the DH multiple access technique to create a UWB communications scheme that has a greater multiple access capacity than does the UWB TR technique by itself.

Claims28

Dependent claims

A radio communication system comprising:

a transmitter for transmitting a plurality of continuous noise transmitted waveforms separated by a time interval D, wherein the transmitted waveforms are encoded by a relative polarity of two instances of the plurality of continuous noise transmitted data;
and
a receiver for receiving the plurality of continuous noise transmitted waveforms transmitted by the transmitter, the receiver comprising:
a bank of correlators, each correlator in the bank of correlators being tuned to a different delay, each correlator of the bank of correlators comprising:
a multiplier for multiplying delayed and undelayed versions of the received signal;
and
an integrator connected to the multiplier for integrating an signal output by the multiplier;
a code word correlator connected to the integrator for correlating a code word corresponding to NC chips, each of the NC chips comprising a continuous noise transmitted waveform separated by a fixed time interval.

5 more elements

An ultra wideband communication system comprising:

a transmitter 100 for generating a plurality of continuous noise transmitted waveforms separated by a time interval, D, transmitted waveforms being encoded by a relative polarity of two instances of the plurality of continuous noise, the transmitter comprising;
a wideband noise source for generating the plurality of continuous noise transmitted waveforms;
a delay 160 connected to the noise source for delaying at least one of the plurality of continuous noise carriers by the time interval D;
an information modulator connected to the delay for modulating the code word into at least one of the plurality of continuous noise transmitted waveforms;
and
a summer connected to the information modulator and the noise source for combining the two instances of the plurality of continuous noise transmitted waveforms wherein a first instance comprises an undelayed continuous noise transmitted waveform and the second instance comprises a delayed continuous noise transmitted waveform comprising the modulated code word;
a receiver for receiving the plurality of continuous noise transmitted waveforms transmitted by the transmitter, the receiver comprising:
a bank of correlators, each correlator in the bank of correlators being tuned to a different delay, each correlator of the bank of correlators comprising;
a multiplier for multiplying delayed and undelayed versions of the received signal;
and
an integrator connected to the multiplier for integrating an signal output by the multiplier;
a code word correlator connected to the integrator for correlating a code word corresponding to NC chips, each of the NC chips comprising a continuous noise transmitted waveform separated by a fixed time interval.

9 more elements

Dependencies are inferred from the claim text.