USRE33157E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Null initiated method and system for monitoring a priority channel
Assignee: Motorola Solutions Inc
•
Filing: 1988-02-24
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Granted: 1990-01-30
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Expires: 2008-02-24
Abstract
Abstract A null initiated priority channel monitoring system provides enhanced nonpriority signal intelligibility and/or enhanced priority channel sensitivity during sample times. The priority channel or channels are monitored during nulls in the received nonpriority signal. The system can have a minimum time period between priority channel monitoring periods to avoid substantially continuous priority channel monitoring. The system can also have a maximum time period between priority channel monitoring or sampling periods to avoid missing any priority channel signal.
Inventors
- 👤 Joseph P. Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
66 words
A method of monitoring one or more priority channels with minimal signal loss on nonpriority channels in a multichannel radio receiver, comprising: receiving a demodulated audio signal on a nonpriority channel; detecting nulls in said received demodulated audio signal; and sampling the priority channel for a priority sampling period for a received signal during each of said null to avoid disruption in said nonpriority received signal.
Claim 2
Independent Claim
66 words
A method of monitoring one or more priority channels with minimal signal loss on nonpriority channels in a multichannel radio receiver, comprising: receiving a demodulated audio signal on a nonpriority channel; detecting nulls in said received demodulated audio signal; and sampling the priority channel for a priority sampling period for a received signal during each of said null to avoid disruption in said nonpriority received signal.
Claim 3
Dependent Claim
18 words
The method as defined in claim 1, including: setting a minimum time period between said priority sampling periods.
Claim 4
Dependent Claim
18 words
The method as defined in claim 1, including: setting a maximum time period between said priority sampling periods.
Claim 5
Dependent Claim
24 words
The method as defined in claim 1, including: receiving only said priority signal when a priority signal is detected during said priority sampling period.
Claim 6
Dependent Claim
19 words
The method as defined in claim 4, including: returning to receive said nonpriority signal when said priority signal terminates.
Claim 7
Dependent Claim
26 words
The method as defined in claim 5, including: pausing for a predetermined delay period when said priority signal terminates before returning to receive said nonpriority signal.
Claim 8
Dependent Claim
25 words
The method as defined in claim 5, including: scanning the priority and nonpriority channels sequentially when both said priority and said nonpriority signals have terminated.
Claim 9
Dependent Claim
23 words
The method as defined in claim 7, including: pausing for a predetermined delay period when said nonpriority signal terminates before scanning said channels.
Claim 10
Dependent Claim
22 words
The method as defined in claim 1, including: sequentially sampling at least a pair of priority channels during said priority sampling period.
Claim 11
Dependent Claim
27 words
The method as defined in claim 1, including: developing a relative audio null signal and comparing it to a predetermined null signal level to detect said nulls.
Claim 12
Dependent Claim
25 words
The method as defined in claim 10, including: varying said predetermined null signal level as a function of the amplitude of said nonpriority received signal.
Claim 13
Independent Claim
72 words
A system of monitoring one or more priority channels with minimal signal loss on nonpriority channels in a multichannel radio receiver, comprising: means for receiving a demodulated audio signal on a nonpriority channel; means for detecting nulls in said received demodulated audio signal; and means for sampling the priority channel for a priority sampling period for a received signal during each of said null to avoid disruption in said nonpriority received signal.
Claim 14
Independent Claim
72 words
A system of monitoring one or more priority channels with minimal signal loss on nonpriority channels in a multichannel radio receiver, comprising: means for receiving a demodulated audio signal on a nonpriority channel; means for detecting nulls in said received demodulated audio signal; and means for sampling the priority channel for a priority sampling period for a received signal during each of said null to avoid disruption in said nonpriority received signal.
Claim 15
Dependent Claim
20 words
The system as defined in claim 12, including: means for setting a minimum time period between said priority sampling periods.
Claim 16
Dependent Claim
20 words
The system as defined in claim 12, including: means for setting a maximum time period between said priority sampling periods.
Claim 17
Dependent Claim
26 words
The system as defined in claim 12, including: means for receiving only said priority signal when a priority signal is detected during said priority sampling period.
Claim 18
Dependent Claim
21 words
The system as defined in claim 15, including: means for returning to receive said nonpriority signal when said priority signal terminates.
Claim 19
Dependent Claim
28 words
The system as defined in claim 16, including: means for pausing for a predetermined delay period when said priority signal terminates before returning to receive said nonpriority signal.
Claim 20
Dependent Claim
27 words
The system as defined in claim 16, including: means for scanning the priority and nonpriority channels sequentially when both said priority and said nonpriority signals have terminated.
Claim 21
Dependent Claim
25 words
The system as defined in claim 18, including: means for pausing for a predetermined delay period when said nonpriority signal terminates before scanning said channels.
Claim 22
Dependent Claim
24 words
The system as defined in claim 12, including: means for sequentially sampling at least a pair of priority channels during said priority sampling period.
Claim 23
Dependent Claim
31 words
The system as defined in claim 12, including: means for developing a relative audio null signal and means for comparing it to a predetermined null signal level to detect said nulls.
Claim 24
Dependent Claim
28 words
The system as defined in claim 21, including: means for varying said predetermined null signal level as a function of the amplitude of said nonpriority received signal. .Iadd.
Claim 25
Independent Claim
71 words
A method of monitoring one or more channels with minimal signal loss on received channels in a multichannel radio receiver, comprising: receiving a signal on a first channel; detecting nulls in said received signal on said first channel; and sampling a second channel for a received signal in response to detection of at least some of said nulls, thereby avoiding disruption in said received signal on said first channel. .Iaddend. .Iadd.
Claim 26
Independent Claim
71 words
A method of monitoring one or more channels with minimal signal loss on received channels in a multichannel radio receiver, comprising: receiving a signal on a first channel; detecting nulls in said received signal on said first channel; and sampling a second channel for a received signal in response to detection of at least some of said nulls, thereby avoiding disruption in said received signal on said first channel. .Iaddend. .Iadd.
Claim 27
Dependent Claim
108 words
The method of claim 23, including setting a minimum time period between samples of said second channel. .Iaddend. .Iadd.25. The method of claim 23, including setting a maximum time period between samples of said second channel. .Iaddend. .Iadd.26. The method of claim 23, including receiving only said received signal on said second channel when said received signal is detected during said sampling. .Iaddend. .Iadd.27. The method of claim 26, including returning to said first channel when said received signal on said second channel terminates. .Iaddend. .Iadd.28. The method of claim 27, including pausing for a predetermined delay period when said received signal on said second channel terminates before
Claim 28
Dependent Claim
75 words
returning to said first channel. .Iaddend. .Iadd.29. A system for monitoring one or more channels with minimal signal loss on received channels in a multichannel radio receiver, comprising: means for receiving a signal on a first channel; means for detecting nulls in said received signal on said first channel; and means for sampling a second channel for a received signal in response to detection of at least some of said nulls, thereby avoiding disruption in
Claim 29
Dependent Claim
75 words
returning to said first channel. .Iaddend. .Iadd.29. A system for monitoring one or more channels with minimal signal loss on received channels in a multichannel radio receiver, comprising: means for receiving a signal on a first channel; means for detecting nulls in said received signal on said first channel; and means for sampling a second channel for a received signal in response to detection of at least some of said nulls, thereby avoiding disruption in
Claim 30
Dependent Claim
133 words
said received signal on said first channel. .Iaddend. .Iadd.30. The system of claim 29, including means for setting a minimum time period between samples of said second channel. .Iaddend. .Iadd.31. The system of claim 29, including means for setting a maximum time period between samples of said second channel. .Iaddend. .Iadd.32. The system of claim 29, including means for receiving only said received signal on said second channel when said received signal is detected during said sampling. .Iaddend. .Iadd.33. The system of claim 32, including means for returning to said first channel when said received signal on said second channel terminates. .Iaddend. .Iadd.34. The system of claim 33, including means for pausing for a predetermined delay period when said received signal on said second channel terminates before returning to said first channel. .Iaddend.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |