US5289496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for radio communication
Assignee: Panasonic Holdings Corp
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Filing: 1991-02-25
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Granted: 1994-02-22
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Expires: 2011-02-25
Abstract
Abstract In a frequency hopped radio communication system wherein a control signal and a speech signal are transmitted together and the speech signal is transmitted via a predetermined set of frequency bands, method and apparatus are provided for converting the control signal into a corresponding RF control signal having a frequency spectrum lying in frequency bands separate from the predetermined set of bands. The frequency bands for the RF control signal may be between the predetermined set of frequency bands for the speech signal and may particularly be within guard bands established between the set of frequency bands for the speech signal.
Inventors
- 👤 Masao Nakagawa
- 👤 Hiroyuki Yabuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:31
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/713; H04B1/715
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
In a method of spread-spectrum radio communication wherein a control signal and a speech signal are transmitted together, an improvement comprising the steps of: converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands between predetermined speech channels; transmitting the RF control signal via at least one of said bands; converting the speech signal into a corresponding RF speech signal; and transmitting the RF speech signal via at least one of the predetermined speech channels.
Claim 2
Dependent Claim
88 words
In a method of spread-spectrum radio communication wherein a control signal and a speech signal are transmitted together, an improvement comprising the steps of: converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands between predetermined speech channels; transmitting the RF control signal via at least one of said bands; converting the speech signal into a corresponding RF speech signal; and transmitting the RF speech signal via at least one of the predetermined speech channels.
Claim 3
Dependent Claim
55 words
The method of claim 1 further comprising the steps of receiving the transmitted RF control signal; recovering the original control signal from the received RF control signal; receiving the transmitted RF speech signal via the at least one of the predetermined speech channels; and recovering the original speech signal from the received RF speech signal.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said step of converting the control signal comprises using frequency hopping to convert the control signal to a frequency hopped RF control signal.
Claim 5
Dependent Claim
49 words
The method of claim 3 wherein said bands lie within guard bands separating said predetermined speech channels and the step of transmitting the frequency hopped RF control signal comprises transmitting the frequency hopped RF control signal via at least one of said guard bands separating said predetermined speech channels.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein said step of converting the speech signal into a corresponding RF speech signal comprises frequency modulating the speech signal.
Claim 7
Dependent Claim
83 words
In a spread-spectrum radio communication apparatus wherein a control signal and a speech signal are transmitted together, a system comprising: means for converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands between predetermined speech channels; means for transmitting the RF control signal; means for converting the speech signal into a corresponding RF speech signal; and means for transmitting the RF speech signal via one of the predetermined speech channels.
Claim 8
Dependent Claim
83 words
In a spread-spectrum radio communication apparatus wherein a control signal and a speech signal are transmitted together, a system comprising: means for converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands between predetermined speech channels; means for transmitting the RF control signal; means for converting the speech signal into a corresponding RF speech signal; and means for transmitting the RF speech signal via one of the predetermined speech channels.
Claim 9
Dependent Claim
58 words
The system of claim 5 further comprising means for receiving the transmitted RF control signal; means for recovering the original control signal from the received RF control signal; means for receiving the transmitted RF speech signal via the one of the predetermined speech channels; and means for recovering the original speech signal from the received RF speech signal.
Claim 10
Dependent Claim
92 words
In frequency-hopped radio communication in a given FM transmission system, wherein a control signal and a speech signal are transmitted together, a method comprising the steps of: converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands separate from predetermined speech channels; transmitting the RF control signal via at least one of said bands; converting the speech signal into a corresponding RF speech signal; and transmitting the RF speech signal via at least one of the predetermined speech channels.
Claim 11
Dependent Claim
92 words
In frequency-hopped radio communication in a given FM transmission system, wherein a control signal and a speech signal are transmitted together, a method comprising the steps of: converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands separate from predetermined speech channels; transmitting the RF control signal via at least one of said bands; converting the speech signal into a corresponding RF speech signal; and transmitting the RF speech signal via at least one of the predetermined speech channels.
Claim 12
Dependent Claim
45 words
The method of claim 8 wherein said bands lie within guard bands separating said predetermined speech channels and the step of transmitting the RF control signal comprises transmitting the RF control signal via at least one of said guard bands separating said predetermined speech channels.
Claim 13
Dependent Claim
29 words
The method of claim 8 wherein said means for converting comprises frequency hopping means using frequency hopping to convert the control signal to a frequency hopped RF control signal.
Claim 14
Dependent Claim
94 words
In a transmission system for frequency-hopped FM radio communication, wherein a control signal and a speech signal are transmitted together, an apparatus comprising: means for converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands separate from predetermined speech channels; means for transmitting the RF control signal via at least one of said bands; means for converting the speech signal into a corresponding RF speech signal; and means for transmitting the RF speech signal via one of the predetermined speech channels.
Claim 15
Dependent Claim
94 words
In a transmission system for frequency-hopped FM radio communication, wherein a control signal and a speech signal are transmitted together, an apparatus comprising: means for converting only the control signal into a corresponding RF control signal having a spread frequency spectrum of separated components lying in respective bands separate from predetermined speech channels; means for transmitting the RF control signal via at least one of said bands; means for converting the speech signal into a corresponding RF speech signal; and means for transmitting the RF speech signal via one of the predetermined speech channels.
Claim 16
Dependent Claim
47 words
The system of claim 11 wherein said bands lie within guard bands separating said predetermined speech channels and said means for transmitting the RF control signal comprises means for transmitting the RF control signal via at least one of said guard bands separating said predetermined speech channels.
References Cited (Backward Citations)
US4977578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |