US4574163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital radio telephone
Assignee: LG Electronics Inc
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Filing: 1983-11-22
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Granted: 1986-03-04
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Expires: 2003-11-22
Abstract
Abstract A two-way digital radio telephone system includes means for transmitting by RF carrier 16 bit binary words including a start bit, a six bit identification code and eight bits of information comprising either an audio sample or a function code, as indicated by an audio/function bit. The carrier is detected and each word serially loaded into a receive shift register which is parallelly unloaded with the identification code being supplied to a comparator and the information data being supplied to a D/A converter. If the comparator yields an identity with the predetermined 6 bit identification code, a D/A converter output is supplied to an amplifier which feeds a conventional telephone coil. The signal is retransmitted on another carrier by a parallelly loaded and serially unloaded transmit shift register which generates a similar binary word including an identification code, digitized audio or function data and the appropriate audio/function bit.
Inventors
- 👤 Thomas J. Zato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A method of wireless communication between a base station and a remote station in a radio telephone system comprising the steps of: assigning fixed digital identification addresses to said base station and to said remote station; converting audio data information and function data information to be transmitted between said stations into digital data; and transmitting said digital data in packets, each packet including an identification address, an audio/function signal for identifying said audio data and said function data and either said audio data information or said function data information.
Claim 2
Independent Claim
89 words
A method of wireless communication between a base station and a remote station in a radio telephone system comprising the steps of: assigning fixed digital identification addresses to said base station and to said remote station; converting audio data information and function data information to be transmitted between said stations into digital data; and transmitting said digital data in packets, each packet including an identification address, an audio/function signal for identifying said audio data and said function data and either said audio data information or said function data information.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein each packet comprises a binary word including a first group of bits defining address data, an audio/function bit and a second group of bits defining information data.
Claim 4
Dependent Claim
98 words
A radio telephone communication system of enhanced privacy comprising: a base station transmitting signals on a first frequency and receiving signals on a second frequency; a remote station transmitting signals on said second frequency and receiving signals on said first frequency; means for digitizing function data information and audio data information at each station; means for generating an identification address and an audio/function data bit at each station; and means for encoding signals transmitted between said station into binary words, each word including an identification address, an audio/function bit and either audio data or function data digitized information.
Claim 5
Dependent Claim
98 words
A radio telephone communication system of enhanced privacy comprising: a base station transmitting signals on a first frequency and receiving signals on a second frequency; a remote station transmitting signals on said second frequency and receiving signals on said first frequency; means for digitizing function data information and audio data information at each station; means for generating an identification address and an audio/function data bit at each station; and means for encoding signals transmitted between said station into binary words, each word including an identification address, an audio/function bit and either audio data or function data digitized information.
Claim 6
Dependent Claim
38 words
The radio telephone system of claim 3 wherein each binary word includes a first group of bits denoting an identification address, said audio/function bit and a second group of bits denoting said function data or said audio data.
Claim 7
Dependent Claim
83 words
In a two-way radio telephone communication system of the type including a base station and a remote station and means for transmitting information therebetween by two different fixed frequency RF signals, the improvement comprising: digitizing both audio and function information to be transmitted and transmitting data packets, each packet containing a binary address, an audio/function bit for determining whether audio or function information is being transmitted and binary information data corresponding to either function information or audio information whereby enhanced privacy is obtained.
Claim 8
Dependent Claim
83 words
In a two-way radio telephone communication system of the type including a base station and a remote station and means for transmitting information therebetween by two different fixed frequency RF signals, the improvement comprising: digitizing both audio and function information to be transmitted and transmitting data packets, each packet containing a binary address, an audio/function bit for determining whether audio or function information is being transmitted and binary information data corresponding to either function information or audio information whereby enhanced privacy is obtained.
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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |