US5960031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrawide-band communication system and method
Assignee: Time Domain Corp
•
Filing: 1997-10-10
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Granted: 1999-09-28
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Expires: 2017-10-10
Abstract
Abstract 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.
Inventors
- 👤 Larry W. Fullerton
- 👤 Ivan A. Cowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:47
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/7163; H04B1/71637; H04B1/707; H04B1/7073; H04B1/7075; H04B1/70751; H04B1/70753; H04B1/71632; H04B1/71635; H04B1/7176; H04B1/7183; H04B14/00; H04B14/02; H04B14/026; H04L; H04L27/00; H04L27/26; H04L27/2601; H04B1/708; H04B2001/6908; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/70707; H04L27/2602; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
152 words
An impulse radio transmitter, comprising: a. a time base to output a periodic timing signal; b. a subcarrier modulator to receive a subcarrier signal and an information signal and modulate said subcarrier signal using said information signal and output a modulated subcarrier signal; c. a subcarrier time modulator to modulate said periodic timing signal using said modulated subcarrier signal and output a modulated timing signal; d. a code source that uses said modulated timing signal to output a coded signal; e. a code time modulator to time modulate said modulated timing signal using said coded signal and output a modulated, coded timing signal, wherein the modulation of said modulated timing signal provides channelization and spectral smoothing of an impulse radio signal to be generated; and f. an output stage to generate said impulse radio signal using said modulated, coded timing signal, wherein said impulse radio signal comprises monocycle pulses spaced in time.
Claim 2
Dependent Claim
152 words
An impulse radio transmitter, comprising: a. a time base to output a periodic timing signal; b. a subcarrier modulator to receive a subcarrier signal and an information signal and modulate said subcarrier signal using said information signal and output a modulated subcarrier signal; c. a subcarrier time modulator to modulate said periodic timing signal using said modulated subcarrier signal and output a modulated timing signal; d. a code source that uses said modulated timing signal to output a coded signal; e. a code time modulator to time modulate said modulated timing signal using said coded signal and output a modulated, coded timing signal, wherein the modulation of said modulated timing signal provides channelization and spectral smoothing of an impulse radio signal to be generated; and f. an output stage to generate said impulse radio signal using said modulated, coded timing signal, wherein said impulse radio signal comprises monocycle pulses spaced in time.
Claim 3
Dependent Claim
17 words
The impulse radio transmitter according to claim 1, wherein said subcarrier modulator frequency modulates said subcarrier signal.
Claim 4
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said output stage transmits monocycle pulses that are broad-band signals.
Claim 5
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said output stage transmits monocycle pulses that are bandlimited signals.
Claim 6
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said code time modulator is responsive to a voltage source.
Claim 7
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said code time modulator is responsive to a current source.
Claim 8
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said code time modulator is responsive to a digital source.
Claim 9
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said subcarrier time modulator is responsive to a voltage source.
Claim 10
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said subcarrier time modulator is responsive to a current source.
Claim 11
Dependent Claim
19 words
The impulse radio transmitter according to claim 1, wherein said subcarrier time modulator is responsive to a digital source.
Claim 12
Dependent Claim
26 words
The impulse radio transmitter according to claim 1, wherein said code source comprises means for pseudo noise coding a data signal to produce said code signal.
Claim 13
Dependent Claim
20 words
The impulse radio transmitter according to claim 11, wherein said data signal is encoded by a return-to-zero direct digital encoder.
Claim 14
Dependent Claim
37 words
The impulse radio transmitter according to claim 12, wherein said return-to-zero direct digital encoder comprises one of a pseudo Manchester encoder, a frequency shift keying encoder, an n-ary phase modulation encoder and a phase amplitude modulation encoder.
Claim 15
Dependent Claim
25 words
The impulse radio transmitter according to claim 1, wherein said output stage uses an antenna to transmit said impulse radio signal into a propagation medium.
Claim 16
Dependent Claim
21 words
The impulse radio transmitter according to claim 14, further comprising a transmission line coupled between said output stage and said antenna.
Claim 17
Independent Claim
119 words
A method for transmitting impulse radio signals, comprising the steps of: (1) modulating a subcarrier signal using an information signal to output a modulated subcarrier signal; (2) time modulating a periodic timing signal using said modulated subcarrier signal to output a modulated timing signal; (3) producing a coded, modulated signal using said modulated timing signal; (4) time modulating said modulated timing signal using said coded, modulated signal to output a modulated, coded timing signal, wherein said modulation of said modulated timing signal provides channelization and spectral smoothing of an impulse radio signal to be generated; and (5) generating said impulse radio signal using said modulated, coded timing signal, wherein said impulse radio signal comprises monocycle pulses spaced in time.
Claim 18
Independent Claim
119 words
A method for transmitting impulse radio signals, comprising the steps of: (1) modulating a subcarrier signal using an information signal to output a modulated subcarrier signal; (2) time modulating a periodic timing signal using said modulated subcarrier signal to output a modulated timing signal; (3) producing a coded, modulated signal using said modulated timing signal; (4) time modulating said modulated timing signal using said coded, modulated signal to output a modulated, coded timing signal, wherein said modulation of said modulated timing signal provides channelization and spectral smoothing of an impulse radio signal to be generated; and (5) generating said impulse radio signal using said modulated, coded timing signal, wherein said impulse radio signal comprises monocycle pulses spaced in time.
Claim 19
Dependent Claim
16 words
The method according to claim 16, further comprising the step of frequency modulating said subcarrier signal.
Claim 20
Dependent Claim
18 words
The method according to claim 16, further comprising the step of transmitting monocycle pulses that are broad-band signals.
Claim 21
Dependent Claim
18 words
The method according to claim 16, further comprising the step of transmitting monocycle pulses that are bandlimited signals.
References Cited (Backward Citations)
FR962130A
Cited
US4361890A
Cited
US4545061A
Cited
US3720950A
Cited
US3593138A
Cited
US3686669A
Cited
US3659203A
Cited
US3662316A
Cited
US3728632A
Cited
US3721912A
Cited
US3772697A
Cited
US3750025A
Cited
US3737776A
Cited
US3739392A
Cited
US3794996A
Cited
US3864635A
Cited
US3866230A
Cited
US4122393A
Cited
US4150375A
Cited
DE2816353A1
Cited
US4291409A
Cited
US4279018A
Cited
US4423517A
Cited
DE3131186A1
Cited
US4695752A
Cited
US4550414A
Cited
US4665404A
Cited
US4813057A
Cited
US5363108A
Cited
US4743906A
Cited
US4979186A
Cited
US4641317A
Cited
US4688232A
Cited
US4803726A
Cited
US4937580A
Cited
US4984247A
Cited
US5099495A
Cited
US5031191A
Cited
US5008899A
Cited
WO1991006155A1
Cited
US5214669A
Cited
US5128961A
Cited
US5222098A
Cited
US5105437A
Cited
US5222103A
Cited
US5148174A
Cited
US5329558A
Cited
US5268926A
Cited
US5140610A
Cited
US5177768A
Cited
US5173923A
Cited
US5400359A
Cited
US5337054A
Cited
US5404355A
Cited
US5469470A
Cited
US5442646A
Cited
US5745525A
Cited
US5677927A
Cited
US5832035A
Cited
US5717713A
Cited
US5687169A
Cited
US5623487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-09-27 | 2003-03-29 | 2003-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-27 | 2007-03-29 | 2007-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-27 | 2011-03-29 | 2011-09-28 | $7700.00 | Window Closed / Lapsed |