Patent US6625229B2 successfully refreshed from Google Patents.
US6625229B2
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Pulse transmission transmitter including a higher order time derivate filter
Assignee: Lockheed Martin Energy Research Corp
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Filing: 2002-02-25
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Granted: 2003-09-23
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Expires: 2022-02-25
Abstract
Abstract Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission transmitter includes: a clock; a pseudorandom polynomial generator coupled to the clock, the pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to the pseudorandom polynomial generator, the exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both the clock and the exclusive-OR gate; a pulse generator coupled to the programmable delay circuit; and a higher order time derivative filter coupled to the pulse generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.
Inventors
- 👤 William B. Dress, Jr.
- 👤 Stephen F. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:21
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04B; H04B1/00; H04B1/69; H04B1/7163; H04B1/717; H04B1/7172; H04B1/7174; H04L25/02; H04L25/03; H04L25/03828; H04L25/03834; H04B1/71637; H04B1/719
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; and a higher order time derivative filter coupled to said pulse generator.
Claim 2
Dependent Claim
75 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; and a higher order time derivative filter coupled to said pulse generator.
Claim 3
Dependent Claim
19 words
The pulse transmission transmitter of claim 1 , wherein said programmable delay circuit includes a programmable-delay monostable multivibrator circuit.
Claim 4
Dependent Claim
23 words
The pulse transmission transmitter of claim 1 , wherein said higher order time derivative filter includes a higher order Gaussian time derivative filter.
Claim 5
Dependent Claim
48 words
The pulse transmission transmitter of claim 1 , wherein said higher order time derivative filter includes a higher order super-Gaussian time derivative filter described by exp(−x 2n /a) where x is time, n is an integer greater than 1 that represents an order and a is a constant.
Claim 6
Dependent Claim
26 words
The pulse transmission transmitter of claim 1 , wherein said higher order time derivative filter includes a higher order time derivative rounded time-limited square pulse filter.
Claim 7
Dependent Claim
23 words
The pulse transmission transmitter of claim 1 , wherein said higher order time derivative filter includes a higher order time derivative discrete filter.
Claim 8
Dependent Claim
28 words
The pulse transmission transmitter of claim 6 , wherein said higher order time derivative discrete filter is selected from the group consisting of Chebyshev polynomials and Krawtchouk polynomials.
Claim 9
Dependent Claim
105 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; and a higher order time derivative filter coupled to said pulse generator, wherein said clock, said pseudorandom polynomial generator, said exclusive-OR gate, said programmable delay circuit, said pulse generator and said higher order time derivative filter all define a one-chip integrated circuit.
Claim 10
Dependent Claim
105 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; and a higher order time derivative filter coupled to said pulse generator, wherein said clock, said pseudorandom polynomial generator, said exclusive-OR gate, said programmable delay circuit, said pulse generator and said higher order time derivative filter all define a one-chip integrated circuit.
Claim 11
Dependent Claim
33 words
The pulse transmission transmitter of claim 8 , wherein said one-chip integrated circuit is implemented in a semiconductor selected from the group consisting of silicon bipolar, complementary metal-oxide semiconductor, silicon-germanium and gallium arsenide.
Claim 12
Dependent Claim
93 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; a higher order time derivative filter coupled to said pulse generator a matching network coupled to said higher order time derivative filter; and an antenna coupled to said matching network.
Claim 13
Dependent Claim
93 words
A pulse transmission transmitter, comprising: a clock; a pseudorandom polynomial generator coupled to said clock, said pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to said pseudorandom polynomial generator, said exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both said clock and said exclusive-OR gate; a pulse generator coupled to said programmable delay circuit; a higher order time derivative filter coupled to said pulse generator a matching network coupled to said higher order time derivative filter; and an antenna coupled to said matching network.
Claim 14
Dependent Claim
11 words
A transceiver comprising the pulse transmission transmitter of claim 10 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-09-22 | 2007-03-24 | 2007-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-22 | 2011-03-24 | 2011-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-22 | 2015-03-24 | 2015-09-23 | $7700.00 | Window Closed / Lapsed |