EP3465955A1 - System and method for transmitting from radio transmitters to cable networks with increased data traffic in the vhf range - Google Patents
System and method for transmitting from radio transmitters to cable networks with increased data traffic in the vhf rangeInfo
- Publication number
- EP3465955A1 EP3465955A1 EP17730355.9A EP17730355A EP3465955A1 EP 3465955 A1 EP3465955 A1 EP 3465955A1 EP 17730355 A EP17730355 A EP 17730355A EP 3465955 A1 EP3465955 A1 EP 3465955A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- mhz
- signal
- frequency band
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
- H04H20/79—CATV [Community Antenna Television] systems using downlink of the CATV systems, e.g. audio broadcast via CATV network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
Definitions
- the invention relates to a system and a method for maintaining the transmission of radio transmitters on cable networks with simultaneous expansion of the internal data transmission in the VHF (Very High Frequency) frequency range.
- VHF Very High Frequency
- DOCSIS Data Over Gable Service Interface Specification
- the present invention is based in essence on the idea of certain radio or radio signals intended for radio receivers connected to the cable network with an original frequency in the VHF range between 30 MHz and 280 MHz, in particular in the range of VHF band II between 65.9 MHZ and 108 MHz and / or the VHF band III between 174 MHz and 230 MHz or between 174 MHz and 240 MHz, by means of a frequency band transfer device to another free frequency range of the cable network to transfer, in this frequency range on the cable network and to transfer directly in front of the radio receiver with a frequency band sinker back to the original and the radio receiver receivable frequency or other frequency receivable by the radio in the VHF range back.
- VHF range from 30 MHz to 280 MHz in which the original frequency is located and which has a width of at least 0. 3 MHz, preferably at least the space for five VHFs Programs, this roughly indicated as width of at least 1, 5 MHz, and wherein the subregion is more preferably one of the well-defined in a known manner VHF bands, as described in the article from "Wikipedia, the free encyclopedia" for keyword "frequency - band ", available on 21 February 2017 at https: // en. wipe dia. org / wiki / frequency band, are specified.
- the other friend The frequency range differs from the subrange and preferably does not overlap with the same, ie lies outside the subrange.
- a predetermined range may be defined to an original frequency, such as according to a table. Instead, it is also possible to determine the sub-area according to a specific method based on the original frequency and possibly other original frequencies and possibly other parameters.
- the other frequency range may be another subrange in the VHF range: For example, if the subrange is the VHF band III in the definition up to 230 MHz, the other frequency range in which the frequency is transferred may already start at 230 MHz and end at about 280 MHz or above or below. It can also be defined as a transmission range outside the FM / FM radio frequencies and the DAB band III, so it is then outside of 30 MHz to 230 MHz. In another variant, the other frequency range is completely outside the VHF range, ie below 30 MHz or above 280 MHz. The other frequency range should be a free transmission frequency range of the cable network. It is so far determined by the occupation of the frequency ranges of the cable network from other services. In an advantageous embodiment, a device for finding a transmission frequency range free of transmitted signals in the cable network is provided, which determines the necessary extent of the transfer and drives units of the system according to the invention accordingly.
- the frequency to which the back is transferred does not differ in one variant from the original frequency, but in another variant it is possible that it differs from the original frequency.
- this is preferably a difference frequency, which is exactly the single or multiple raster distribution frequency in the frequency raster of the respective broadcasting service.
- VHF ultra-short wave
- the raster distribution frequency is equal to 50 kHz
- the difference frequency can then be n times 50 kHz, where n is equal to 1 or any other suitably small natural number (to still be within the receivable range).
- DAB Digital Audio Broadcasting
- DAB + the rasterizer frequency, depending on the block in the channel, is 1.712 MHz or 1.872 MHz.
- a system for transferring and retransmitting at least one VHF (Very High Frequency) radio signal into and out of the free transmission frequency range the system being at least one frequency band transferring means for arrangement in a cable headend of the cable network, which is designed to at least one radio signal to be transmitted with an original frequency from a subregion in the VHF range between 30 MHz and 280 MHz, in particular in the range of VHF band II between 65.9 MHz and 108 MHz and / or the VHF band III between 174 MHz and 240 MHz, for transmission over the cable network to a transmission frequency in another predetermined (and free) transmission frequency range of the cable network.
- VHF Very High Frequency
- the system according to the invention has at least one frequency band rear-transfer device which can be connected to the input side of a radio receiver which can be connected to the cable network, in particular to be arranged between a receiver-side cable network connection and a radio interface which can be connected to the cable network via the cable connection - Catcher provided and adapted to transfer the transmitted on the transmission frequency radio signal back to the original frequency or other receivable by the connected or radio receiver radio frequency in the VHF range back.
- the advantage of the invention is thus that by using a frequency band transfer device in the cable headend of the cable network ⁇ signal conditioning center of the cable systems) and the interposing of a frequency band return transfer device to the receiver cable junction box connected radio receiver can continue to be served with reception, while at the same time on the frequencies that the radio receiver previously received directly from the cable network, now an Internet data transmission can take place.
- the customers would have to exchange their existing devices with new radio receivers, eg by so-called DVB-C (Digital Video Broadcasting - Gable) or IP (Internet Protocol) streaming receivers.
- DVB-C Digital Video Broadcasting - Gable
- IP Internet Protocol
- the arrangement and design presented here offers the possibility for cable network operators to offer analogue UK radio and DAB or DAB + for a fee, as only Kabe1 network customers are able to use a frequency band return device for their receiver-side cable connection socket are to receive these signals.
- Another advantage also results from the fact that on many cable networks partly those VHF frequencies are not used, which are occupied for wireless transmission simultaneously by strong stations in the region. Because these frequencies can radiate from the outside into the cable network and thus a Disturb transmission.
- the radio signal transmission takes place on the network in transmission frequency ranges outside the broadcast bands, now additional VHF frequencies are occupied on the cable network.
- the signal, which is prepared for the radio receiver after the antenna socket is sufficiently strong in accordance with standards shielding to remain receivable in the receiver without interference.
- the inventive system is designed to not only a radio signal of a single frequency, but preferably also a plurality of radio signals of a frequency band, in particular the VHF band II between 65.9 MHz and 108 MHz and / or the VHF band III defined between 174 MHz and 230 MHz or defined between 175 MHz and 240 MHz, more preferably a complete frequency band, such as the VHF band II between 64.9 MHz and 108 MHz, and or the VHF Bar.d III between 174 MHz and 230 MHz / 240 MHz, in to transfer a free transmission frequency range and, after the transmission in the free transmission frequency range, to transfer back to the original frequency or other frequency that can be received by the connectable or connected radio in the VHF range on the receiver side.
- a frequency band in particular the VHF band II between 65.9 MHz and 108 MHz and / or the VHF band III defined between 174 MHz and 230 MHz or defined between 175 MHz and 240 MHz, more preferably a complete
- the free transmission frequency range is advantageously selected such that all the frequencies of the original frequency range to be transmitted can be accommodated therein. It is also conceivable, however, that a first frequency group or a first frequency subband of the VHF frequency band to be transmitted into a first free transmission frequency range and a further frequency group or another frequency subband of the transferring VHF frequency band are transferred to another f eien transmission frequency range.
- the transmission frequencies or the transmission frequency range should advantageously be chosen such that they are outside the mobile radio frequencies, since otherwise mobile radio devices are used in the Households could lead to interference in the radio reception by their transmission.
- the free, preferably contiguous transmission frequency range can be within and / or outside the VHF range.
- the frequency band transfer device comprises a frequency band adjuster for raising the at least one radio signal to be transmitted with the original one Frequency to a higher transmission frequency of a free / predetermined réellesfrequenzbe- range of the cable network and that the frequency band remindtransferier means a frequency band sinker for lowering the transmitted at the higher transmission frequency radio signal to the original or other receivable by the radio frequency in the VHF Area.
- the frequency band transfer A device has a frequency band sinker for lowering the at least one radio signal to be transmitted with the original or other receivable by the Radioem catchable frequency to a lower transmission frequency in a free / the predetermined transmission frequency range of the cable network and that the Frequenzband- rucktransferier- device corresponding to a frequency band-lifter for raising the radio signal transmitted on the lower transmission frequency to the original or otherwise related Radio Frequency in the VHF range.
- the frequency band lifter includes a frequency mixer having a signal input, an oscillator input and a signal output, a locally operatively connected to the oscillator input local oscillator for generating a local high frequency signal and with the Signal output operatively connected output bandpass filter.
- the frequency mixer is designed to receive a radio signal to be lifted via the signal input, to mix multiplicatively with the radio frequency signal received via the oscillator input, and at least one sum signal and preferably also a difference signal corresponding to the sum or difference of the radio frequency signal at the output and to raise the radio signal to be raised.
- the output bandpass filter is configured to output substantially only the sum signal as a raised radio signal.
- the above-mentioned elements provide a technically particularly simple implementation of a frequency band lifter.
- the local high frequency signal is chosen such that the sum signal from the frequency to be lifted and the local high frequency signal in the free transmission frequency range in which the signal is actually transmitted on the cable network, or again in the original frequency range.
- the output bandpass filter is preferably a wideband bandpass filter designed to filter out a complete frequency range to be transferred or retransmitted.
- the frequency band sinker in a similar, only quasi-inverted manner, the frequency band sinker according to the above-described advantageous embodiment of the invention, a frequency mixer with a signal input, an oscillator input and a signal output, operatively connected to the oscillator input local - comprise oscillator for generating a local high-frequency signal and an output-bandpass filter operatively connected to the output.
- the local high-frequency signal of the frequency band sinker and the frequency band lifter are essentially equal in frequency.
- the frequency mixer of the frequency band sinker is adapted to receive a signal to be lowered via its signal input to mix multiplicatively with the received via its oscillator input local high-frequency signal of the frequency band sinker and at its signal output at least one differential signal and preferably also to generate a sum signal corresponding to the sum or difference of the local high-frequency signal and the radio signal to be dropped.
- the output bandpass filter of the frequency band sinker is further configured to output substantially only the difference signal as a lowered radio signal, for example as the radio signal lowered to the original frequency or the lowered radio signal to be transmitted.
- the frequency band transfer device has an input bandpass filter on the input side, in particular in front of the frequency mixer of the frequency band pickup or of the frequency band dropper. is essentially to output only radio signals from a specific original VHF frequency range, in particular from the VHF band II between 65.9 MHz and 108 MHz and / or the VHF band III between 174 MHz and 230 MHz or 240 MHz. This prevents other signals present in the cable network from being undesirably affected by the frequency band. Transfer device are also transferred to the free transmission frequency range. The other frequencies thus arrive only gedäm ft or not at the input side in the frequency band transfer device, in particular to the input of the frequency mixer of the frequency band-Anheberer or the frequency band-sinker.
- the frequency band vomitier device on the input side in particular before the frequency mixer of the frequency band-Anhebers or the frequency band-lowering, an input -Bandpas s - has filter is designed to issue essentially only radio signals from the free transmission frequency range of the cable network, ie about the frequency of the local Hochfrequenzsig ⁇ nals the frequency band-Anheberers or frequency band-lowering lowered or lowered radio signals from the original area of the VHF- Bandes II between 65.9 MHz and 108 MHz and / or the VHF band III between 174 MHz and 230 MHz or 240 MHz.
- the frequency band transfer device may furthermore be advantageous for the frequency band transfer device to have an input amplifier stage for signal amplification purposes on the input side, preferably - if present - before or after the input bandpass filter.
- the signal on the output side or at the output of the frequency band transfer device may possibly be too strong for the feed-in point of the cable network system. Therefore, it may be provided as required that the frequency band transfer device has an output attenuation stage on the output side in order to attenuate the radio signal to be fed into the cable network. If the signal is too weak, the Inversely, levels can be increased by an output amplifier stage, in particular by a broadband output amplifier stage, which has the frequency band transfer means on the output side. In particular, it is conceivable that the output attenuation stage or the output amplifier stage of the frequency band transfer device, depending on the implementation of the frequency band transfer device, the output bandpass filter of the frequency band lifter or the frequency band lowering or downstream.
- the frequency band back-transfer device on the input side preferably - if present - before or after the input bandpass filter, an input amplifier stage for signal amplification purposes.
- the signal level output side bz. be too high or too low at the output of the frequency band retransformer.
- the frequency band vomtransferier device output side have an output - attenuation stage or an output -Verstalresti to reduce the signal level to the usual or required for the radio receiver measure or. to reinforce.
- the output attenuation stage or the output amplifier stage of the frequency band retransmission device may be upstream or downstream of the output bandpass filter of the frequency band lifter or of the frequency band sinker.
- the local oscillator of the frequency band lifter or the frequency band sinker generates a local frequency signal with a constant frequency.
- This frequency can be set internally fixed in advance (ie not controllable).
- control or programming of the frequency may be provided by means of a programmable controller.
- the control of the local oscillator can be based on a programmed frequency by means of a phase locked loop (PPL: phase locked loop) with frequency divider and quartz reference be realized.
- PPL phase locked loop
- the local oscillator may also be controlled and synchronized by a carrier signal transmitted over the cable network. Since the vast majority of radio receivers tolerate a small frequency deviation, this will only be necessary if the local radio frequency is to be controlled remotely or so that a more cost-effective production of the devices at the customers of the cable network is possible.
- the local Osz illator the frequency band lifter is controllable by means of a control device, in particular locally or remotely controlled by means of a transferable via the cable network carrier signal; and / or that the local oscillator of the frequency band sinker is controllable by means of a control device, in particular locally or remotely controlled by means of a carrier signal which can be transmitted via the cable network.
- the control device finds the carrier signal itself, for example in a search.
- the frequency band back-transfer device to be connected to a single or broadband TV cable connection, it may be provided according to a further advantageous embodiment of the invention that the system further for decoupling the transmitted signal on the raised frequency a power divider or signal output device for arrangement between the em-side cable network connection and the frequency absorber has. This preserves the reception or transmission of other signals transmitted via the cable network.
- the system described here can be realized both with analog technology and based on DSP (Digital Signal Processor) technology by means of firmware or mixed become.
- DSP Digital Signal Processor
- filters, mixers and amplifiers can be simulated by means of software and / or firmware code.
- the frequency band transfer device and / or the frequency band return transfer device in particular possibly used frequency attenuator, frequency lifter, preferably any input bandpass filter used, output Bandpass filter and / or frequency mixer at least partially be realized by means of analog electronic components.
- the abovementioned components or parts thereof are reproduced by means of a digital processor in combination with software and / or firmware.
- the invention further relates to the use of a system according to the invention for the transmission of at least one radio signal having an original frequency in an at least 1.5 MHz wide subregion of the VHF range, which is defined between 30 MHz and 280 MHz, in particular in the range of VHF Band II between 65.9 MHz and 108 MHz and / or VHF band III between 174 MHz and 230 MHz or between 174 MHz and 240 MHz, in a predetermined (ie) free transmission frequency range of a cable network, for transmitting the original frequency of the Radio signal by means of the frequency band transfer device of the inventive system to a transmission frequency in the predetermined (that is free) transmission frequency range, and to the back transfer of the transmitted on the transmission frequency via the cable network radio signal by means of the frequency band remindtransferier device of the inventive system before a connected to the cable network Radio receiver to the original or any other receivable by the connected radio receiver frequency.
- An independent idea further relates to a method for transmitting at least one VHF (Very High Freque
- the process according to the invention can preferably be carried out with the system according to the invention disclosed herein.
- the described method may be preceded by a step of determining the predetermined transmission frequency range which is determined as an area free of other transmitted signals. Further details of the invention and in particular an exemplary embodiment of the proposed system for transferring and transferring back transfer frequencies are explained below with reference to the accompanying drawings. Show it:
- FIG. 1 shows a possible embodiment of a frequency band transfer device according to the system according to the invention.
- FIG. 2 shows a possible embodiment of a frequency band back-transfer device according to the system according to the invention.
- VHF band II VHF band II
- DAB / DAB + / DMB VHF band III
- Fig. 1 shows a possible embodiment of a frequency band transfer device 100 according to the system according to the invention, which in the present case substantially comprises a frequency band pickup 101 or is essentially implemented as a frequency band pickup 101.
- the frequency band pickup 101 may have a plurality of inputs 1 to which all FM or DAB carrier signals of similar high frequency level to be transmitted may be applied.
- FM radio programs are transmitted over country-specific frequencies, usually on the VHF band II, while the carrier signals of DAB ensembles are usually in the band III, depending on the country, the so-called VHF channel 13 or the so-called L-band can be added. China and South Korea have different channel grids from Europe.
- the relevant frequency ranges for the cable networks are, however, all in and around the VHF band III.
- the frequency band pickup 101 has, after the inputs 1, an input bandpass filter 2, which in the present exemplary embodiment only transmits VHF signals or DAB / DAB + / DMB signals.
- the other frequencies are only attenuated or not at all to the input 4 of a frequency mixer 5.
- the frequency mixer 5 comprises two inputs: a signal input 4 for the useful signal and an oscillator input 6 for a local oscillator 7.
- the Local oscillator 7 generates a local radio frequency signal with a constant frequency.
- the frequency can be fixed or predetermined.
- a controller 8 or programming of the frequency can be provided, which typically takes place before delivery by means of a programmable controller 8.
- the controller 8 of the local oscillator 7 can, for example, based on a programmed frequency by means of a phase locked loop (PPL: phase locked loop) with frequency divider and quartz reference done.
- PPL phase locked loop
- the local oscillator 7 can alternatively also be controlled and synchronized by a carrier signal which is transmitted via the cable network.
- a carrier signal which is transmitted via the cable network.
- the local radio frequency signal is e.g. fernges euert is or if a more cost-effective production of the devices to be made possible by the customers of the cable network.
- the frequency mixer 5 are to be transmitted radio signal fn at the signal input 4 and the local high frequency signal fLO on Oscillator input 6 on.
- the frequency mixer 5 generates, inter alia, the difference signal f LO - fn and the sum signal f LO + fn, which are also referred to as IF signals (intermediate frequencies - intermediate frequencies).
- the signal for the feed point of the cable system can be strong, so it can be attenuated as needed - as in the present embodiment - by means of an output attenuation stage 11. Conversely, if the signal is too weak, the level may be increased by a downstream broadband amplifier. At the output 12 of the frequency band lifter 101 is now provided for the transmission of the raised radio signal with the transmission frequency fLO + fn ready for the feed into the cable network.
- the design of the system advantageously to take into account that the signals at the inputs 1, the input bandpass filter 2, the input amplifier stage 3 and the signal input 4 of the frequency mixer 5 practically no longer at the output 12 of the frequency band lifter 101 appear.
- the advantage is the attenuation at least 60 dB, otherwise the planned, extended Internet data transmission via DOCSIS could be affected.
- a feed 13 may be provided which, depending on requirements, is supplied with power, for example, from the power grid with or without redundancy.
- a frequency example is briefly explained:
- the local high-frequency signal can therefore be set to 200 MHz.
- the FM program range or the VHF band II between 65.9 MHz and 108 MHz can thus be transmitted over the cable network in the free transmission frequency range between 265.9 MHz and 308 MHz.
- VHF band III (174 MHz - 240 MHz).
- the VHF band III could be transmitted between 324 and 390 MHz, for example, with a second frequency oscillator which has a local high frequency of 150 MHz.
- the sum of the lowest frequency of the frequency band to be transmitted and the bandwidth of the frequency band to be transmitted is smaller than the local high-frequency signal. Since the quality of the required filters also depend on the frequency spacing and the constellation of the mixing products, the local high-frequency signal should be chosen so that the production remains cost-effective.
- the one or more raised radio signals in the free transmission frequency range are then transmitted via the cable network and made available on the receiver side to cable connections.
- the transmitted in the free transmission frequency range radio signal is then supplied according to the invention from the cable network via a receiver-side cable connection of an inventive frequency band back-transfer device 200.
- Fig. 2 shows a possible embodiment of such Frequency band back-transfer device 200, which in the present case essentially has a frequency band sinker 201 or is essentially realized as a frequency band sinker 201.
- various cable junction boxes can be provided, which usually each have a TV and a radio connection. Depending on the model of the cable junction box, the radio connection transmits the entire frequency band or predominantly only the VHF band II.
- the frequency band retransmission device 200 or the frequency band retractor 201 -as shown in FIG. 2 - intended to use a broadband TV connection.
- a power divider or signal extractor 22 passes - preferably a larger part - of the cable signal received from the cable network to a TV connection 23, to which a TV set - instead as previously connected to the cable connection box directly - can be connected.
- the other part of the cable signal arrives at an input bandpass filter 24, which transmits signals from the free transmission frequency range and directs them to the input 26 of a frequency mixer 27 of the frequency band sinker 201.
- the remaining frequencies are suppressed to such an extent that no interference of the radio reception arises.
- an input bandpass filter 24 of higher or lower quality may be necessary for this purpose.
- the choice of the transmission frequency range and the distances to adjacent frequencies on the cable network should be selected in an advantageous manner so that a cost-effective production of the input bandpass filter 24 is possible with little space. A disturbance on the TV reception or on the operation of the cable network can be virtually ruled out while observing the usual application practice. If junction boxes are used in a cable network, which also transmit the transmission frequency range sufficiently on the radio connection, the power divider or signal output coupler 22 and the TV connection 23 can be omitted. The input bandpass filter 24 can then be connected directly to the radio socket.
- the frequency mixer 27 of the frequency band sinker 201 has - analogous to the frequency mixer 5 of the frequency band lifter 101 - two inputs: a signal input 26 for the useful signal and an oscillator input 28 for a local oscillator 29 which a local high-frequency signal generated at a constant frequency.
- the frequency of the local high frequency signal of the frequency band sinker 201 must be substantially the same as that of the local oscillator 7 of the frequency band lifter 101. Similarly, this is either fixedly defined and the local oscillator 7 of the frequency band sinker configured accordingly. Or there is a control or programming of the frequency of the local high-frequency signal of the frequency band descent limiter 201.
- a controller 30 is provided, which can be done for example on the basis of a programmed frequency by means of a phase locked loop with frequency divider and quartz reference.
- the programming of the frequency can be done, for example, directly during the production or, as in the present exemplary embodiment, for example via a USB interface 31.
- the controller 30 may be variable in frequency and may be able to determine the frequency range in a search using a radio frequency tag in the radio signals. via the USB port can the frequency band sinker Be supplied in an advantageous manner at the same time with energy.
- the local oscillator 29 may also be controlled and synchronized by a carrier signal transmitted over the cable network (not shown). Since most radio receivers tolerate a small frequency deviation, this will only be necessary if the local radio frequency signal is eg remotely controlled should, or to realize a cost-effective production of the frequency band sinker 201,
- the useful signal fn and the local high-frequency signal fLO of the local oscillator 29 are present at the signal input 26 at the senator input 28.
- the frequency mixer 27 of the frequency band sinker 201 At the signal output 32, the frequency mixer 27 of the frequency band sinker 201 generates i.a. the intermediate frequencies fLO - fn and fLO + fn.
- the output bandpass filter 33 For the lowering or re-transferring only the difference of the frequencies f LO - fn is used and filtered out for this purpose by means of an output bandpass filter 33. Since the radio receivers are generally not disturbed by the presence of signals with frequencies outside their bandwidth, the quality of the output bandpass filter 33 is significantly less critical than the quality of the input bandpass filter 24.
- the signal level at the output of the output bandpass filter 33 is high, it can be reduced with an output attenuation stage 34 to the level customary for the radio receiver if required.
- the signals at the connection socket 21, at the power divider 22, at the TV connection 24, at the input bandpass filter 24, at the input amplifier stage 25 and at the input 26 of the frequency mixer 27 practically no longer appear at the output 35 of the frequency band sinker 201.
- An advantage is the attenuation in both directions at least 60 dB, otherwise the useful signal (radio reception) or DOCSIS signals could be affected.
- a USB connection 31 can be used to power the frequency band back-transfer device 200 or the frequency band lowering device 201, for the power supply of which a USB plug power supply unit 35 can be provided in an advantageous manner.
- the power consumption of the frequency band sinker 201 proposed here is very small, so that the USB voltage of 5 V is sufficient for this purpose.
- the radio receiver which can be connected to a connection or output 35 of the frequency-band retransmission device 200 or of the frequency band sinker 201, according to the present invention now again has all useful signals on the frequency band (FM: Volume II, DAB / DAB + / DMB: Volume III).
- FM Volume II
- DAB / DAB + / DMB Volume III
- several systems according to the invention can be used.
- the corresponding frequency band-transferring devices so as frequency band lifter, constructed in parallel.
- the corresponding frequency band return transfer devices such as frequency band sinkers, are connected in series.
- a circuit in the frequency - return device can be used to check how strong a signal is that from the Output arrives forth in the frequency band back-transfer device 200, and the device turns off when the signal strength exceeds a threshold.
- the signal strength at the output can be monitored in relation to the signal strength at the input and a threshold value for switching off can be related to a corresponding ratio value.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Superheterodyne Receivers (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16172163 | 2016-05-31 | ||
PCT/CH2017/000043 WO2017205989A1 (en) | 2016-05-31 | 2017-05-15 | System and method for transmitting from radio transmitters to cable networks with increased data traffic in the vhf range |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3465955A1 true EP3465955A1 (en) | 2019-04-10 |
Family
ID=56096533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17730355.9A Withdrawn EP3465955A1 (en) | 2016-05-31 | 2017-05-15 | System and method for transmitting from radio transmitters to cable networks with increased data traffic in the vhf range |
Country Status (4)
Country | Link |
---|---|
US (1) | US10998990B2 (en) |
EP (1) | EP3465955A1 (en) |
CN (1) | CN109314588A (en) |
WO (1) | WO2017205989A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20220190867A1 (en) * | 2020-12-16 | 2022-06-16 | Globtel Holding d.o.o. | Transmission of high-frequency radio signals |
Family Cites Families (10)
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US2854506A (en) | 1955-06-15 | 1958-09-30 | Itt | Television signal distribution system |
US3619782A (en) * | 1966-01-28 | 1971-11-09 | Hughes Aircraft Co | Coherent catv transmission system |
US5548323A (en) * | 1994-03-30 | 1996-08-20 | Hollyanne Corp. | Multiple input processor for cable television head end controller |
JP4547761B2 (en) * | 2000-03-01 | 2010-09-22 | ソニー株式会社 | Reception device, television transmission system, and television transmission method |
FR2842370B1 (en) * | 2002-07-10 | 2004-09-17 | Thomson Licensing Sa | MICROWAVE ADAPTER FOR CABLE NETWORK |
CN1759607A (en) * | 2003-03-11 | 2006-04-12 | 汤姆森许可贸易公司 | Apparatus and method for controlling signals distribution by backward channel |
TWI311855B (en) * | 2006-04-17 | 2009-07-01 | Via Tech Inc | Harmonic-rejection modulating devices and methods |
CA2691749A1 (en) * | 2007-06-22 | 2008-12-31 | Clariton Networks, Ltd. | Method and apparatus for providing wimax over catv, dbs, pon infrastructure |
EP2523371A3 (en) * | 2011-05-13 | 2014-11-05 | Televés, S.A. | Device for processing telecommunications signals |
CN102547775B (en) * | 2012-02-29 | 2015-01-07 | 中邮科通信技术股份有限公司 | System and method for simultaneous indoor covering of multiple types of communication signals by utilizing CATV (community antenna television) cable |
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2017
- 2017-05-15 WO PCT/CH2017/000043 patent/WO2017205989A1/en active Search and Examination
- 2017-05-15 EP EP17730355.9A patent/EP3465955A1/en not_active Withdrawn
- 2017-05-15 CN CN201780034586.5A patent/CN109314588A/en active Pending
- 2017-05-15 US US16/305,590 patent/US10998990B2/en active Active
Also Published As
Publication number | Publication date |
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US20200366394A1 (en) | 2020-11-19 |
CN109314588A (en) | 2019-02-05 |
US10998990B2 (en) | 2021-05-04 |
WO2017205989A1 (en) | 2017-12-07 |
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