US6611223B2
Expired / Lapsed
US
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Method and apparatus for ultra wide-band communication system using multiple detectors
Assignee: National University of Singapore
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Filing: 2001-10-02
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Granted: 2003-08-26
•
Expires: 2021-10-02
Abstract
Abstract A method and apparatus for detecting ultra wide-band (UWB) signals using multiple detectors having dynamic transfer characteristics. A receiver circuit is implemented using devices such as op-amps to provide the required dynamic characteristics. Detectors used in the UWB communication systems of the present invention utilize direct sequence spread spectrum (DSSS) technology for multiple access reception.
Inventors
- 👤 Kay Soon Low
- 👤 Kin Mun Lye
- 👤 Paul Kar Ming Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03828; H04L25/03834; H04L25/0384; H04B1/707
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
93 words
A receiver circuit for receiving an ultra wide-band (UWB) signal, comprising: an antenna operable to receive the UWB signal; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the UWB signal; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the UWB signal; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB signal.
Claim 2
Dependent Claim
93 words
A receiver circuit for receiving an ultra wide-band (UWB) signal, comprising: an antenna operable to receive the UWB signal; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the UWB signal; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the UWB signal; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB signal.
Claim 3
Dependent Claim
15 words
The receiver circuit of claim 1 wherein said first and second circuits are nonlinear circuits.
Claim 4
Dependent Claim
28 words
The receiver circuit of claim 1 wherein said first and second pulse generators each have an associated transfer curve characterized by an unstable region bounded by stable regions.
Claim 5
Dependent Claim
20 words
The receiver circuit of claim 1 wherein said UWB signal comprises a pseudorandom code sequence modulated onto an information signal.
Claim 6
Dependent Claim
19 words
The receiver circuit of claim 4 wherein the pseudorandom code sequence is modulated using an M-ary orthogonal modulation scheme.
Claim 7
Dependent Claim
18 words
The receiver circuit of claim 4 wherein the pseudorandom code sequence is modulated using an antipodal modulation scheme.
Claim 8
Dependent Claim
26 words
The receiver circuit of claim 6 wherein the antipodal modulation scheme provides positive and negative Gaussian monocycle waveforms representing a digital “0” and digital “1”, respectively.
Claim 9
Dependent Claim
35 words
The receiver circuit of claim 1 wherein the first pulse generator generates the first pulse sequence, only if the received UWB signal has a voltage level that is higher than a predetermined positive threshold value.
Claim 10
Dependent Claim
35 words
The receiver circuit of claim 8 wherein the second pulse generator generates the second pulse sequence, only if the received UWB signal has a voltage level that is lower than a predetermined negative threshold value.
Claim 11
Dependent Claim
105 words
An ultra wide-band (UWB) communication system, comprising: one or more transmitters operable to transmit one or more UWB signals; and a receiver operable to receive the UWB signals, said receiver comprising; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the UWB signals; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the UWB signals; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB signals.
Claim 12
Dependent Claim
105 words
An ultra wide-band (UWB) communication system, comprising: one or more transmitters operable to transmit one or more UWB signals; and a receiver operable to receive the UWB signals, said receiver comprising; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the UWB signals; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the UWB signals; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB signals.
Claim 13
Dependent Claim
16 words
The UWB communication system of claim 10 wherein the first and second circuits are nonlinear circuits.
Claim 14
Dependent Claim
32 words
The UWB communication system of claim 10 wherein the first and second pulse generators of the receiver each have an associated transfer curve characterized by an unstable region bounded by stable regions.
Claim 15
Dependent Claim
26 words
The UVB comununication system of claim 10 wherein the one or more transmitters each have a modulator for modulating a pseudonoise code sequence onto information signals.
Claim 16
Dependent Claim
18 words
The UWB communication system of claim 13 wherein each of the modulators uses an M-ary orthogonal modulation scheme.
Claim 17
Dependent Claim
35 words
The UWB communication system of claim 10 wherein the first pulse generator generates a pulse sequence, only when a received UWB signal has a voltage level that is higher than a predetermined positive threshold value.
Claim 18
Dependent Claim
35 words
The UWB communication system of claim 10 wherein the second pulse generator generates a pulse sequence, only when a received UWB signal has a voltage level that is lower than a predetermined negative threshold value.
Claim 19
Dependent Claim
15 words
The UWB communication system of claim 13 wherein the modulators use an antipodal modulation scheme.
Claim 20
Dependent Claim
27 words
The UWB communication system of claim 17 wherein the antipodal modulation scheme provides positive and negative Gaussian monocycle waveforms representing a digital “0” and digital “1”, respectively.
Claim 21
Dependent Claim
62 words
An ultra wide-band (UWB) communication system, comprising: a plurality of transmitters operable to transmit a corresponding plurality of UWB signals; a plurality of detectors, each detector having a pulse generating circuit for generating a unique pulse sequence in response to the UWB signals; and a pulse processing circuit operable to decode the pulse sequences and determine information carried in the UWB signals.
Claim 22
Dependent Claim
62 words
An ultra wide-band (UWB) communication system, comprising: a plurality of transmitters operable to transmit a corresponding plurality of UWB signals; a plurality of detectors, each detector having a pulse generating circuit for generating a unique pulse sequence in response to the UWB signals; and a pulse processing circuit operable to decode the pulse sequences and determine information carried in the UWB signals.
Claim 23
Dependent Claim
16 words
The UWB communication system of claim 19 wherein each pulse generating circuit is a nonlinear circuit.
Claim 24
Dependent Claim
31 words
The UWB communication system of claim 19 wherein the plurality of detectors are capable of generating the pulse sequences upon receipt of a simultaneous transmission of the plurality of UWB signals.
Claim 25
Dependent Claim
21 words
The UWB communication system of claim 19 wherein the plurality of transmitters are configured to transmit simaultaneously over the same channel.
Claim 26
Dependent Claim
18 words
The UWB communication system of claim 22 wherein spread spectrum techniques are used to create the UWB signals.
Claim 27
Dependent Claim
20 words
The UWB communication system of claim 23 wherein the spread spectrum technique used is the direct sequence spread spectrum technique.
Claim 28
Dependent Claim
28 words
The UWB communication system of claim 24 wherein each of the transmitters each has a modulator for modulating a pseudonoise (PN) code sequence to create the UWB signals.
Claim 29
Dependent Claim
18 words
The UWB communication system of claim 25 wherein each of the modulators uses an M-ary orthogonal modulation scheme.
Claim 30
Dependent Claim
15 words
The UWB communication system of claim 25 wherein the modulators use an antipodal modulation scheme.
Claim 31
Dependent Claim
27 words
The UWB communication system of claim 27 wherein the antipodal modulation scheme provides positive and negative Gaussian monocycle waveforms representing a digital “0” and digital “1”, respectively.
Claim 32
Dependent Claim
111 words
A receiver circuit for receiving an ultra wide-band (UWB) signal, comprising: an antenna operable to receive the UWB signal; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the WB signal; an inverter configured to receive the UWB signal and provide an inverted UWB signal; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the inverted UWB signal; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB and inverted UWB signals.
Claim 33
Dependent Claim
111 words
A receiver circuit for receiving an ultra wide-band (UWB) signal, comprising: an antenna operable to receive the UWB signal; a first circuit having a first pulse generator operable to produce a first pulse sequence in response to the WB signal; an inverter configured to receive the UWB signal and provide an inverted UWB signal; a second circuit coupled in parallel with the first circuit, said second circuit having a second pulse generator operable to produce a second pulse sequence in response to the inverted UWB signal; and a pulse processing circuit operable to decode the first and second code sequences and determine information carried in the UWB and inverted UWB signals.
Claim 34
Dependent Claim
15 words
The receiver circuit of claim 29 wherein said first and second circuits are nonlinear circuits.
Claim 35
Dependent Claim
28 words
The receiver circuit of claim 29 wherein said first and second pulse generators each have an associated transfer curve characterized by an unstable region bounded by stable regions.
Claim 36
Dependent Claim
20 words
The receiver circuit of claim 29 wherein said UWB signal comprises a pseudorandom code sequence modulated onto an information signal.
Claim 37
Dependent Claim
19 words
The receiver circuit of claim 32 wherein the pseudorandom code sequence is modulated using an M-ary orthogonal modulation scheme.
Claim 38
Dependent Claim
18 words
The receiver circuit of claim 32 wherein the pseudorandom code sequence is modulated using an antipodal modulation scheme.
Claim 39
Dependent Claim
26 words
The receiver circuit of claim 34 wherein the antipodal modulation scheme provides positive and negative Gaussian monocycle waveforms representing a digital “0” and digital “1”, respectively.
Claim 40
Independent Claim
46 words
A method of producing information contained in an ultra wide-band (UWB) signal comprising: receiving the UWB signal; producing a first pulse sequence from the UWB signal; producing a second pulse sequence from the UWB signal; and producing information based on the first and second pulse sequences.
Claim 41
Independent Claim
46 words
A method of producing information contained in an ultra wide-band (UWB) signal comprising: receiving the UWB signal; producing a first pulse sequence from the UWB signal; producing a second pulse sequence from the UWB signal; and producing information based on the first and second pulse sequences.
Claim 42
Dependent Claim
43 words
The method of claim 36 wherein the step of producing the first pulse sequence includes applying the UWB signal to a first nonlinear circuit and the step of producing the second pulse sequence includes applying the UWB signal to a second nonlinear circuit.
Claim 43
Dependent Claim
22 words
The method of claim 37 wherein the UWB signal is applied to the first and second circuits at substantially the same time.
Claim 44
Dependent Claim
16 words
The method of claim 36 wherein spread spectrum techniques are used to create the UWB signal.
Claim 45
Dependent Claim
18 words
The method of claim 39 wherein the spread spectrum technique used is the direct sequence spread spectrum technique.
Claim 46
Dependent Claim
17 words
The method of claim 36 wherein the UWB signal is created with a modulated pseudonoise code sequence.
Claim 47
Dependent Claim
15 words
The method of claim 41 wherein the modulated pseudonoise uses an M-ary orthogonal modulation scheme.
Claim 48
Dependent Claim
14 words
The method of claim 42 wherein the modulated pseudonoise uses an antipodal modulation scheme.
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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) | 2006-08-25 | 2007-02-24 | 2007-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-25 | 2011-02-24 | 2011-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-25 | 2015-02-24 | 2015-08-26 | $7700.00 | Window Closed / Lapsed |