US4121158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio system
Assignee: Siemens AG
•
Filing: 1976-10-22
•
Granted: 1978-10-17
•
Expires: 1996-10-22
Abstract
Abstract A radio system includes a fairly large number of transmitting-receiving stations which are spatially distributed over an area to be covered. Each of the stations preferably serves a fairly large number of individual subscribers in such a way that the individual subscriber can reach a subscriber who may be connected to another transmitting-receiving station. Radio frequency channels with different frequencies are provided at least for the speech channels of adjacent exchanges and positioned in a frequency range which is fixed for the system. The transmission of the individual speech channel is provided in accordance with digital methods, preferably by means of converting the signals of the individual speech channel into a PCM or a pulse delta modulation signal. Preferably, the bandwidth for the individual signal is reduced through the use of a Vocoder. The transmitter of an exchange transmits its information toward the other exchanges, through which a connection is to be established to the called party, by way of an omnidirectional antenna which effects little grouping in the plane spatially determined by the exchange. Directional antennas are provided for receiving the radio frequency signals and preferably provide a relatively high degree of grouping in the horizontal plane and in the vertical plane. The transmitter therefore covers all exchanges which must be reached by way of one antenna while the receiver in each exchange will respectively receive the transmitters of the other exchanges by way of its associated directional antenna.
Inventors
- 👤 Manfred Hanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/08; H04W16/00; H04W16/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
151 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange.
Claim 2
Dependent Claim
151 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange.
Claim 3
Dependent Claim
48 words
A radio system according to claim 1, wherein several adjacent radio frequency speech channels are grouped as a unit in the radio frequency range, means in said receiving means for processing said grouped channels as a unit and means for separating said channels in the intermediate frequency range.
Claim 4
Dependent Claim
59 words
A radio system according to claim 1, wherein said means for receiving includes a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superheterodyne stage having an intermediate frequency output, means for separating said channels according to the intermediate frequency signals and means for demodulating the signals in the separated channels.
Claim 5
Dependent Claim
71 words
A radio system according to claim 1, wherein said means for receiving includes a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superheterodyne stage having an intermediate frequency output, means for separating said channels according to the intermediate frequency signals, and means for relaying the signals of a separated channel to another exchange by connecting a separated channel to said transmitting means.
Claim 6
Dependent Claim
22 words
A radio system according to claim 4, wherein said means for relaying signals comprises a regenerating circuit for signals in digital form.
Claim 7
Dependent Claim
149 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for digitally modulating signals in said voice channels, means for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange.
Claim 8
Dependent Claim
149 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for digitally modulating signals in said voice channels, means for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange.
Claim 9
Dependent Claim
16 words
The radio system of claim 6, wherein said means for modulating signals is a PCM modulator.
Claim 10
Dependent Claim
16 words
The radio system of claim 6, wherein said means for modulating signals is a delta modulator.
Claim 11
Dependent Claim
15 words
The radio system of claim 6, wherein said means for reducing bandwidth includes a vocoder.
Claim 12
Dependent Claim
242 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange, several adjacent radio frequency speech channels being grouped as a unit in the radio frequency range, means in said receiving means for processing said grouped channels as a unit and means for separating said channels in the intermediate frequency range, said means for receiving including a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superheterodyne stage having an intermediate frequency output, means for separating said channels according to the intermediate frequency signals and means for demodulating the signals in the separated channels.
Claim 13
Dependent Claim
242 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange, several adjacent radio frequency speech channels being grouped as a unit in the radio frequency range, means in said receiving means for processing said grouped channels as a unit and means for separating said channels in the intermediate frequency range, said means for receiving including a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superheterodyne stage having an intermediate frequency output, means for separating said channels according to the intermediate frequency signals and means for demodulating the signals in the separated channels.
Claim 14
Dependent Claim
266 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange, several adjacent radio frequency speech channels being grouped as a unit in the radio frequency range, means in said receiving means for processing said grouped channels as a unit and means for separating said channels in the intermediate frequency range, said means for receiving including a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superterodyne stage having an intermediate output means for separating said channels according to the intermediate frequency signals, and means for relaying the signals of a separated channel to another exchange by connecting a separated channel to said transmitting means, said means for relaying signals comprising regenerating circuit for signals in digital form.
Claim 15
Dependent Claim
266 words
A radio system including a large number of transmitting receiving exchanges spatially distributed over an area and each connected to and serving a large number of individual subscribers who may become interconnected via another such exchange, each of said exchanges comprising means providing a plurality of radio frequency voice channels of different frequency within a frequency range that is fixed for the system, means for pulse modulating signals in said voice channels, a vocoder for reducing the bandwidth of the individual signals in a voice channel, means for transmitting said voice channels including an omnidirectional antenna which radiates toward the other exchanges with little grouping in the plane determined by the exchange, a plurality of means for receiving transmissions from other exchanges including a plurality of directional antennas which group both in the horizontal and vertical planes, and means for connecting said receiving means to a subscriber connected to the exchange, several adjacent radio frequency speech channels being grouped as a unit in the radio frequency range, means in said receiving means for processing said grouped channels as a unit and means for separating said channels in the intermediate frequency range, said means for receiving including a plurality of separate receivers each connected to a separate directional antenna and each including a radio frequency superterodyne stage having an intermediate output means for separating said channels according to the intermediate frequency signals, and means for relaying the signals of a separated channel to another exchange by connecting a separated channel to said transmitting means, said means for relaying signals comprising regenerating circuit for signals in digital form.
References Cited (Backward Citations)
US2234244A
Cited
US2848545A
Cited
US3118018A
Cited
US3104392A
Cited
US3626112A
Cited
US3582787A
Cited
US3562431A
Cited
US3632891A
Cited
US3692952A
Cited
US3748398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |