US5204980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiver systems
Assignee: The General Electric Company PLC
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Filing: 1992-04-09
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Granted: 1993-04-20
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Expires: 2012-04-09
Abstract
Abstract A radio receiver system for receiving double sideband signals from a plurality of antennas (N1,N2) having different reception characteristics detects a reduction in power in one of the sidebands of a received signal, due to multiple path reception or other disturbances. The system then selects for use by the receiver a signal from an antenna less affected by the disturbances.
Inventors
- 👤 Paul R. Sharples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0805; H04B7/0814; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A radio receiver system comprising: a radio receiver for receiving double sideband signals applied to an antenna terminal of the receiver; at least two attennas having different reception characteristics; a switching arrangement arranged to connect the antenna terminal of the receiver to a selected one of the antennas; and control means for controlling the operation of the switching arrangement in dependence on the difference in power in the two sidebands of a signal at said antenna terminal.
Claim 2
Dependent Claim
77 words
A radio receiver system comprising: a radio receiver for receiving double sideband signals applied to an antenna terminal of the receiver; at least two attennas having different reception characteristics; a switching arrangement arranged to connect the antenna terminal of the receiver to a selected one of the antennas; and control means for controlling the operation of the switching arrangement in dependence on the difference in power in the two sidebands of a signal at said antenna terminal.
Claim 3
Dependent Claim
29 words
A system as claimed in claim 1, in which said control means comprises means for operating said switching arrangement when the said difference in power exceeds a predetermined value.
Claim 4
Dependent Claim
35 words
A system as claimed in claim 2, in which said control means comprises means for operating said switching arrangement if said difference in power exceeds a predetermined proportion of the total power in both sidebands.
Claim 5
Dependent Claim
33 words
A system as claimed in claim 1, in which said control means comprises means for operating said switching arrangement when said difference has a rate of change with time exceeding a predetermined value.
Claim 6
Dependent Claim
33 words
A system according to claim 1 wherein said switching arrangement comprises means for connecting said antenna terminal to a different one of said antennas each time it is operated by said control means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |