US5539832A
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Multi-channel signal separation using cross-polyspectra
Assignee: Ramot at Tel Aviv University Ltd
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Filing: 1993-04-05
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Granted: 1996-07-23
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Expires: 2013-04-05
Abstract
Abstract A signal processing system includes a plurality of detectors for detecting signals, each detector receiving signals from plural sources; and a processor for receiving the detected signals and producing a reconstruction filter for filtering the detected signals to produce reconstructed source signals in which each source signal is reconstructed without interference from the other source signals. The reconstruction filter is produced such that cross-polyspectra of the reconstructed signals are forced to approach zero.
Inventors
- 👤 Ehud Weinstein
- 👤 Daniel Yellin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:44
CPC Classifications
H; H03; H03H; H03H21/00; H03H21/0012; H03H21/0025; H03H21/0029; G; G06; G06F; G06F18/00; G06F18/20; G06F18/21; G06F18/213; G06F18/2134; G06F18/21343; H03H2021/0034; H04; H04R; H04R3/00; H04R3/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
A signal processing system for separating signals received from plural sources via an unknown channel, comprising: a plurality of detectors each for detecting said signals received from said plural sources; and a processor for receiving the detected signals and producing a reconstruction filter for filtering the detected signals to produce reconstructed source signals in which each source signal is reconstructed without interference from the other source signals; characterized in producing the reconstruction filter such that higher-order cross-polyspectra of the reconstructed signals are forced to approach zero.
Claim 2
Dependent Claim
86 words
A signal processing system for separating signals received from plural sources via an unknown channel, comprising: a plurality of detectors each for detecting said signals received from said plural sources; and a processor for receiving the detected signals and producing a reconstruction filter for filtering the detected signals to produce reconstructed source signals in which each source signal is reconstructed without interference from the other source signals; characterized in producing the reconstruction filter such that higher-order cross-polyspectra of the reconstructed signals are forced to approach zero.
Claim 3
Dependent Claim
66 words
A signal processing system according to claim 1, wherein the number of detectors and sources is two, and the reconstruction filter is adjusted so that the following polyspectra of the reconstructed source signals v 1 [n] and v 2 [n] at the output of the reconstruction filter are forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.1.sub.v.sbsb.2 (w.sub.1,w.sub.2)=0 (w.sub.1,w.sub.2)εΩ.sub.2 P.sub.v.sbsb.2.sub.v.sbsb.2.sub.v.sbsb.1 (w.sub.1,w.sub.2)=0 (w.sub.1,w.sub.2)εΩ.sub.2 where Ω 2 is a preselected frequency region.
Claim 4
Dependent Claim
66 words
A signal processing system according to claim 1, wherein the number of detectors and sources is two, and the reconstruction filter is adjusted so that the following polyspectra of the reconstructed source signals v 1 [n] and v 2 [n] at the output of the reconstruction filter are forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.1.sub.v.sbsb.1.sub.v.sbsb.2 (w.sub.1,w.sub.2,w.sub.3)=0 (w.sub.1,w.sub.2,w.sub.3)εΩ.sub.3 P.sub.v.sbsb.2.sub.v.sbsb.2.sub.v.sbsb.2.sub.v.sbsb.1 (w.sub.1,w.sub.2,w.sub.3)=0 (w.sub.1,w.sub.2,w.sub.3)εΩ.sub.3 where Ω 3 is a preselected frequency region.
Claim 5
Dependent Claim
53 words
A signal processing system according to claim 2, wherein the reconstruction filter is adjusted so that the following polyspectra of the reconstructed source signals v 1 [n] and v 2 [n] at its output are forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.1.sub.v.sbsb.1.sub.v.sbsb.2 (w.sub.1,w.sub.2,w.sub.3)=0 (w.sub.1,w.sub.2,w.sub.3)εΩ.sub.3 P.sub.v.sbsb.2.sub.v.sbsb.2.sub.v.sbsb.2.sub.v.sbsb.1 (w.sub.1,w.sub.2,w.sub.3)=0 (w.sub.1,w.sub.2,w.sub.3)εΩ.sub.3 where Ω 3 is a preselected frequency region.
Claim 6
Dependent Claim
52 words
A signal processing system according to claim 2, wherein the reconstruction filter is adjusted so that the following cross-spectrum of the reconstructed source signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.2 (w)=0 wεΩ where Ω is a preselected frequency region.
Claim 7
Dependent Claim
52 words
A signal processing system according to claim 3, wherein the reconstruction filter is adjusted so that the following cross-spectrum of the reconstructed source signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.2 (w)=0 wεΩ where Ω is a preselected frequency region.
Claim 8
Dependent Claim
52 words
A signal processing system according to claim 4, wherein the reconstruction filter is adjusted so that the following cross-spectrum of the reconstructed source signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: P.sub.v.sbsb.1.sub.v.sbsb.2 (w)=0 wεΩ where Ω is a preselected frequency region.
Claim 9
Dependent Claim
60 words
A signal processing system according to claim 2, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at its output is forced to approach zero: cum(v.sub.1 [n],v.sub.1 [n-τ.sub.1 ],v.sub.2 [n-τ.sub.2 ])=0 (τ.sub.1,τ.sub.2)εB.sub.2 cum(v.sub.2 [n],v.sub.2 [n-τ.sub.1 ],v.sub.2 [n-τ.sub.2 ])=0 (τ.sub.1,τ.sub.2)εB.sub.2 where B 2 is a preselected set of integers.
Claim 10
Dependent Claim
64 words
A signal processing system according to claim 3, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at its output is forced to approach zero: cum(v.sub.1 [n],v.sub.1 [n-τ.sub.1 ],v.sub.1 [n-τ.sub.2 ],v.sub.2 [n-τ.sub.3 ])=0 (τ.sub.1,τ.sub.2,τ.sub.3)εB.sub.3 cum(v.sub.2 [n],v.sub.2 [n-γ.sub.1 ],v.sub.1 [n-γ.sub.2 ],v.sub.2 [n-γ.sub.3 ])=0 (γ.sub.1,γ.sub.2,γ.sub.3)εB.sub.3 where B 3 is a preselected set of integers.
Claim 11
Dependent Claim
64 words
A signal processing system according to claim 8, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at its output is forced to approach zero: cum(v.sub.1 [n],v.sub.1 [n-τ.sub.1 ],v.sub.1 [n-τ.sub.2 ],v.sub.2 [n-τ.sub.3 ])=0 (τ.sub.1,τ.sub.2,τ.sub.3)εB.sub.3 cum(v.sub.1 [n],v.sub.1 [n-τ.sub.1 ],v.sub.1 [n-τ.sub.2 ],v.sub.2 [n-τ.sub.3 ])=0 (τ.sub.1,τ.sub.2,τ.sub.3)εB.sub.3 where B 3 is a preselected set of integers.
Claim 12
Dependent Claim
52 words
A signal processing system according to claim 8, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: cum(v.sub.1 [n],v.sub.2 [n+τ[)=0 τεB where B is a preselected set of integers.
Claim 13
Dependent Claim
52 words
A signal processing system according to claim 9, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: cum(v.sub.1 [n],v.sub.2 [n+τ[)=0 τεB where B is a preselected set of integers.
Claim 14
Dependent Claim
52 words
A signal processing system according to claim 10, wherein the reconstruction filter is adjusted so that the following cumulants of the signals v 1 [n] and v 2 [n] at the reconstruction filter output is also forced to approach zero: cum(v.sub.1 [n],v.sub.2 [n+τ[)=0 τεB where B is a preselected set of integers.
References Cited (Backward Citations)
US3935574A
Cited
US4283795A
Cited
US4320535A
Cited
US4473906A
Cited
US4672674A
Cited
US4499601A
Cited
EP0149981A2
Cited
EP0210609A2
Cited
WO1988010540A1
Cited
US5020540A
Cited
US5237618A
Cited
US5208786A
Cited
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