CN111147095B - Method, circuit and device for separating radio frequency signal and digital square wave signal - Google Patents
Method, circuit and device for separating radio frequency signal and digital square wave signal Download PDFInfo
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- CN111147095B CN111147095B CN201911316509.6A CN201911316509A CN111147095B CN 111147095 B CN111147095 B CN 111147095B CN 201911316509 A CN201911316509 A CN 201911316509A CN 111147095 B CN111147095 B CN 111147095B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
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Abstract
The invention provides a method, a circuit and a device for separating a radio frequency signal and a digital square wave signal, wherein the method is used for separating a mixed signal of the radio frequency signal and the digital signal at a radio frequency front end and comprises the following steps: step 1: performing equal-power distribution on a mixed signal of the radio-frequency signal and the digital signal to obtain two sub-mixed signals with equal power; step 2: sequentially performing impedance matching, band-pass filtering, signal amplification and differential balance signal conversion on one of the sub-mixed signals and then sampling to obtain a separated radio frequency signal; and step 3: and performing low-pass filtering on the other sub-mixed signal, and then performing single-ended-differential conversion and peak-to-peak attenuation at the same time and then sampling to obtain a separated digital signal. The method of the invention realizes the lossless separation of two signals at the receiving end for the two characteristic signals which are mixed and transmitted in the physical layer of the wired communication.
Description
Technical Field
The invention relates to the field of communication, in particular to a circuit and a method for separating a mixed signal of a radio frequency carrier signal and a digital square wave signal which are transmitted in parallel in a 1553B bus communication physical layer at a receiving radio frequency front end to realize mutually independent communication.
Background
In an airplane airborne wired electronic communication system, a traditional data bus MIL-STD-1553B is called as an airplane internal time-division command response type multiplex transmission data bus. The 1553B bus is an internal electronic system networking standard of the airplane, which is proposed by the United states in order to adapt to the development of the airplane at the end of the 20 th century 70 years, is widely applied to an integrated avionics system and a plug-in management and integration system of the airplane, and gradually expands to the fields of flight control and other systems, tanks, ships, aerospace and the like. Its transmission rate can reach 1Mbps, connects simple nimble between the equipment, and the noise tolerance is high, and communication efficiency is high and reliable, adopts for the US army mark, regards it as airborne equipment intercommunicating's bus standard. With the progress of the times, the data volume in bus communication is larger and larger, and the 1Mbps transmission rate of the 1553B bus is far from meeting the requirements. In order to improve the communication rate of the 1553B bus, the communication rate of the 1553B bus can be improved to 4Mbps by changing a Manchester coding form through years of research in China. In 5 months 2015, the north american standardization organization formally promulgated the enhanced 1553B bus standard STANAG 7221. Foreign edgeWater corporation developed 1553B bus communication products with communication rates up to 100Mbps based on the enhanced bus standard STANAG 7221. The enhanced 1553B bus standard STANAG 7221, which operates simultaneously with existing MIL-STD-1553B messages without affecting existing MIL-STD-1553B messages. The current state of research in this area is still at a blank stage.
In the invention, a radio frequency carrier signal is additionally added in a 1553B bus in the earlier stage to increase the frequency spectrum benefit rate, and a mixed signal of a radio frequency carrier and a Manchester coded digital square wave is transmitted in a 1553B bus shielding cable in parallel, so that the problem of the communication rate of the 1553B bus is successfully solved, but the mixed signal is separated at a receiving end and does not interfere with independent communication, thereby becoming an engineering problem.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to separate a radio frequency carrier signal and a Manchester coded digital square wave mixed signal in a 1553B bus at a receiving end so as to realize non-interference and independent communication.
Therefore, the invention adopts the following technical means:
a method of separating a radio frequency signal and a digital signal, the method for separating a mixed signal of the radio frequency signal and the digital signal at a radio frequency front end, the method comprising the steps of:
step 1: dividing the mixed signal into two sub-mixed signals, wherein the power values of the two sub-mixed signals are equal and the sum of the power values is equal to the power value of the mixed signal;
step 2: sequentially performing impedance matching, band-pass filtering, signal amplification and differential balance signal conversion on one of the sub-mixed signals and then sampling to obtain a separated radio frequency signal;
the impedance matching is used for reducing the energy reflection of the radio frequency signal in the mixed signal and simultaneously attenuating the energy of the low-frequency component digital signal in the mixed signal; the band-pass filtering is used for further attenuating the power of the digital signal in the sub-mixed signal on the basis of impedance matching; the signal amplification is used for amplifying only the power of the radio frequency signal; the differential balanced signal conversion is used for converting the signal obtained in the last step into a differential balanced signal;
and step 3: performing low-pass filtering on the other sub-mixed signal, and then performing single-ended differential conversion and peak value attenuation at the same time and then sampling to obtain a separated digital signal;
the low-pass filtering is used for passing only the digital signal of the low-frequency component; the single-ended differential conversion is used for carrying out differential signal conversion on the signals obtained after the low-pass filtering; the peak-to-peak attenuation is used for attenuating high-frequency components in the signal obtained after single-ended differential conversion.
Specifically, before step 1, the power of the mixed signal is first attenuated.
Preferably, the power of the mixed signal is attenuated by a pi-type attenuator.
Specifically, in step 2, before the differential balanced signal is converted, the signal obtained by amplifying the signal is subjected to automatic gain control.
Preferably, the automatic gain control employs a variable gain amplifier.
Specifically, in step 2, the differential balanced signal conversion is implemented by an ADC interface driver.
In step 2 or step 3, the sampling is realized by an ADC module.
In step 2, a band-pass anti-aliasing filter is arranged in front of the ADC module and used for filtering clutter signals.
The invention also provides a circuit based on the method for separating the radio frequency signal and the digital signal, which comprises a bus interface, a power divider connected with the bus interface in series and used for performing equal power distribution on the mixed signal to obtain two sub-mixed signal channels, wherein the mixed signal of the radio frequency signal and the digital signal is coupled and input through the bus interface;
one sub-mixed signal channel comprises an impedance matching module, a band-pass filtering module, a signal amplification module, a differential balance signal conversion module and a radio frequency signal sampling module which are sequentially connected in series;
the impedance matching module is used for reducing the energy reflection of the radio frequency signal in the mixed signal and simultaneously attenuating the energy of the low-frequency component digital signal in the mixed signal; the band-pass filtering module is used for further attenuating the power of the digital signal in the sub-mixed signal on the basis of impedance matching; the signal amplification module is used for amplifying the power of the radio frequency signal only; the differential balance signal conversion module is used for converting the signals obtained in the last step into differential balance signals;
the other sub-mixed signal channel comprises a low-pass filtering module, an ADC driver module and a digital signal sampling module which are sequentially connected in series;
the low-pass filtering module is used for only passing the digital signal of the low-frequency component; the ADC driver module is used for simultaneously carrying out single-ended differential conversion and peak value attenuation, and the single-ended differential conversion is used for carrying out differential signal conversion on the signal obtained by the low-pass filtering module; the peak-to-peak attenuation is used for attenuating high-frequency components in the signal obtained after single-ended differential conversion.
Meanwhile, the invention also provides a mixed signal separation device which comprises a processor, wherein the processor is used for realizing the method for separating the radio frequency signal and the digital signal.
Compared with the prior art, the scheme of the invention has the advantages that:
1. for two kinds of characteristic signals which are mixed and transmitted in a wired communication physical layer, lossless separation of the two kinds of signals is realized at a receiving end.
2. The method realizes the large dynamic range reception of the mixed signal in the wired communication, and can meet the requirements of signal separation function and signal to noise ratio of the received signal under different received signal powers.
3. Therefore, the 1553B bus greatly improves the communication speed on the basis of the original physical layer, and becomes a set of complete method system.
Drawings
FIG. 1 is a hardware schematic block diagram of the method of the present invention.
The method of the invention is further illustrated below with reference to the figures and examples.
The specific implementation mode is as follows:
the Radio Frequency Front End (RFFE) is a core component of a mobile communication system and mainly plays a role in receiving and transmitting radio frequency signals. The method of the invention is used for separating a mixed signal of a radio frequency signal and a digital signal at a radio frequency front end, i.e. the mixed signal is separated after passing through the radio frequency front end.
The band-pass filtering in the invention refers to allowing waves in a specific frequency band to pass through, and shielding waves in other frequency bands. The band-pass filter 5 of the invention has the passband bandwidth just meeting the bandwidth of the radio frequency carrier signal, and further attenuates the power of the low-frequency digital square wave signal in the entering mixed signal. The band-pass filter (band-pass filter) of the invention is a device which allows the wave of a specific frequency band to pass through and shields other frequency bands. For example, the RLC tank is an analog band pass filter.
The balanced signal and the unbalanced signal are used for transmitting differential signals in a balanced mode and single-ended signals in an unbalanced mode. The reason why the balance/unbalance conversion is performed is that: the radio frequency loop ground required by the single-ended signal is often shared with the direct current ground, which may cause mutual interference; the differential signal can be physically isolated from the direct current ground so as to solve the interference problem between the grounds; and the differential signal can effectively inhibit common mode interference (see 'practical radio frequency technology', huzhuhao).
The single-ended differential conversion is characterized in that a single-ended input finger signal is composed of a reference end and a signal end, the reference end is generally a ground end, differential conversion is carried out on a single-ended signal, two signals are output, one signal is in phase with an original signal, and the other signal is in phase opposition with the original signal. The differential signal has stronger common-mode interference resistance and is suitable for long-distance transmission, and the single-ended signal does not have the function. After the signal is transmitted to the receiving end, the differential signal can be converted into a single-ended signal. In many cases, a single-ended signal needs to be converted into a differential signal, which requires a circuit capable of converting the single-ended signal into the differential signal, i.e., a single-ended-to-differential converter.
The peak-to-peak value attenuation of the invention means that only the energy of the high-frequency component is greatly attenuated, and the attenuation degree of the low-frequency component is not large.
The automatic gain control, namely the AGC module, performs power compensation on the carrier signals with different powers obtained in the previous step, and ensures that the signal powers transmitted by different signal sources in the bus are all kept at a fixed value after passing through the AGC module.
The anti-aliasing filter of the present invention is a low pass filter for reducing aliasing frequency components to a negligible level in the output level.
Example 1:
as shown in fig. 1, which is a partial functional block diagram of a radio frequency front-end hardware circuit of the method of the present invention, this embodiment provides a circuit for separating a radio frequency signal and a digital signal, where the circuit includes a bus interface, a power divider connected in series with the bus interface, and two sub-mixed signal channels respectively connected in series with the power divider, where one sub-mixed signal channel includes an impedance matching module, a band-pass filtering module, a signal amplifying module, a differential balanced signal conversion module, and a radio frequency signal sampling module, which are sequentially connected in series; the other sub-mixed signal channel comprises a low-pass filtering module, an ADC driver module and a digital signal sampling module which are sequentially connected in series.
The mixed signal of the radio frequency signal and the digital signal is coupled and input through a bus interface, and the mixed signal is subjected to equal-power distribution through a power divider to obtain two sub-mixed signal channels which are respectively a radio frequency signal channel and a digital signal channel.
In the radio frequency signal channel, the impedance matching module adopts LC matching and is used for improving the reflection of the radio frequency signal energy in the mixed signal and simultaneously attenuating the energy of low-frequency component digital signals in the mixed signal; the band-pass filtering module adopts a band-pass filter and is used for further attenuating the power of a digital signal in the sub-mixed signal on the basis of impedance matching; the signal amplification module adopts a low noise amplifier and is used for amplifying the power of the radio frequency signal only; and the differential balance signal conversion module is used for converting the signals obtained in the last step into differential balance signals and finally sending the differential balance signals into the sampling module to obtain radio frequency signals.
In a digital signal channel, a low-pass filter is adopted by a low-pass filtering module and is used for only passing a digital signal with low-frequency components; the ADC driver module is used for simultaneously carrying out single-ended differential conversion and peak value attenuation, and the single-ended differential conversion is used for carrying out differential signal conversion on the signal obtained by the low-pass filtering module; and the peak-to-peak value attenuation is used for attenuating high-frequency components in the signal obtained after the single-ended differential conversion, and finally the high-frequency components are sent to a sampling module to obtain a digital signal.
Thus, lossless separation of radio frequency signals and digital signals is achieved.
Example 2:
the embodiment provides a mixed signal separation device, which includes a processor, and the processor is used for implementing the mixed signal separation method of the invention, and includes: the input signal interface 1 and the radio frequency power divider 3 are divided into two physical channels after the radio frequency power divider 3. 4-9 are carrier signal channels; 10-12 are Manchester encoded digital square wave signal channels.
The processor executes the following steps:
the method comprises the following steps: performing equal-power distribution on a mixed signal of the radio-frequency signal and the digital signal to obtain two sub-mixed signals with equal power;
step 1.1 the mixed signal of the carrier wave and the digital square wave in the communication bus is coupled and input into the radio frequency front end separation circuit through the interface connector 1.
When the communication in step 1.2 is established, the mixed signal of the radio frequency carrier signal and the manchester coding signal obtained in step 1.1 firstly enters the pi-type attenuator 2 for power attenuation, and the power of the mixed signal input into the radio frequency front end is ensured not to exceed the input 1dB compression point of the mixed signal at most, so that the radio frequency front end receiving circuit always works in a linear range. Meanwhile, it is also ensured that the signal transmitted from the signal source end is not attenuated to be less than the sensitivity of the receiving circuit, which results in the failure of signal demodulation. The signal transmitted by any remote signal source is always within the dynamic range of the receiving link after passing through the pi-type attenuator 2.
Step 1.3 the mixed signal after being preprocessed in step 1.2 enters a power divider 3, and the mixed signal obtained in step two is divided into two signal channels with equal power, namely a carrier signal channel and a digital square wave signal channel. The two channels are mixed signals of square waves and carrier waves, and post-processing of signal separation is respectively carried out.
Step two: separation of radio frequency signals:
step 2.1, the carrier channel sends the mixed signal obtained in the step 1.3 to an LC impedance matching module 4, so that on one hand, the transmission line impedance matching function is carried out, and the energy loss caused by signal reflection is avoided; on the other hand, the LC impedance matching module 4 can filter out the dc component of the digital square wave in the mixed signal, so as to weaken the energy of the digital square wave. And entering a band-pass filter module 5, wherein the passband bandwidth of the band-pass filter just meets the bandwidth of the carrier signal, and further attenuating the power of the low-frequency digital square wave signal in the entering mixed signal.
Step 2.2, the rest carrier signals and the digital square wave signals with weak energy after the carrier channel passes through the step 2.1 are further sent to a low noise amplifier module 6, the working frequency band of the low noise amplifier 6 only meets the requirement of the carrier frequency band, the power of the carrier signals is further amplified, and the weak digital square wave signals are not amplified.
And 2.3, the AGC module 7 performs power compensation on the carrier signals with different powers obtained in the step 2.2, and the controllable range of AGC meets the linear dynamic range of a receiving link. And the signal power transmitted by different signal sources in the bus is ensured to be kept at a fixed value after passing through the AGC module and is sent to the ADC interface driver.
And 2.4, sending the carrier signal processed in the step 2.3 to the ADC interface driver 8 by a fixed gain value, converting the single-ended unbalanced signal into a differential balanced signal by the interface driver 8, and adjusting the signal voltage amplitude value to be sent to the rear-end ADC module 9 for sampling. The ADC block 9 is preceded by a band-pass anti-aliasing filter in order to filter out spurious signals other than the carrier.
At this point, the carrier channel circuit part completes the separation of the carrier and the digital square wave mixed signal.
Step three: separation of digital signals
And 3.1, a digital square wave channel is adopted, the digital square wave and the carrier wave mixed signal obtained in the step 1.3 are sent to a low-pass filter 10, the frequency band of the low-pass filter is selected to suppress the power of the carrier wave signal by 50dB, and only the digital square wave of the low frequency band can pass through the low-pass filter. And only the digital square wave signal and the weak carrier signal are left in the digital square wave channel and are sent to the ADC driver at the later stage.
And 3.2, a digital square wave channel is adopted, the mixed signal obtained in the step 3.1 is sent to an ADC driver 8, the ADC driver with a proper bandwidth is selected, the digital square wave signal is subjected to single-end conversion and differential division and simultaneously subjected to peak-to-peak value attenuation, and the attenuated digital square wave signal is sent to a rear-stage ADC sampling module 12. Because the energy of the digital square wave signal is far greater than that of a weak carrier signal, the digital square wave characteristics in the sampling result are restored.
Claims (8)
1. A method for separating radio frequency signals and digital signals, which is used for separating mixed signals of the radio frequency signals and the digital signals after the mixed signals pass through a radio frequency front end, is characterized in that the mixed signals are radio frequency carrier signals and digital square wave signals which are transmitted in parallel in a 1553B bus communication physical layer, and the method comprises the following steps:
step 1: dividing the mixed signal into two sub-mixed signals, wherein the sum of the power values of the two sub-mixed signals is equal to the power value of the mixed signal;
step 2: sequentially performing impedance matching, band-pass filtering, signal amplification and differential balance signal conversion on one of the sub-mixed signals and then sampling to obtain a separated radio frequency signal;
the impedance matching is used for reducing the energy reflection of the radio frequency signal in the sub-mixed signal and simultaneously attenuating the energy of the low-frequency component digital signal in the sub-mixed signal; the band-pass filtering is used for further attenuating the power of the digital signal in the sub-mixed signal on the basis of impedance matching; the signal amplification is used for amplifying only the power of the radio frequency signal; the differential balanced signal conversion is used for converting the signal obtained in the last step into a differential balanced signal;
and step 3: performing low-pass filtering on the other sub-mixed signal, and then performing single-ended differential conversion and peak value attenuation at the same time and then sampling to obtain a separated digital signal;
the low-pass filtering is used for passing only the digital signal of the low-frequency component; the single-ended differential conversion is used for carrying out differential signal conversion on the signals obtained after the low-pass filtering; the peak-to-peak value attenuation is used for attenuating high-frequency components in the signal obtained after single-ended differential conversion;
before step 1, firstly, the power of the mixed signal is attenuated, and a pi-type attenuator is adopted.
2. The method of claim 1, wherein in step 2, the signal obtained by amplifying the signal is subjected to automatic gain control before the differential balanced signal conversion.
3. The method of separating a radio frequency signal and a digital signal of claim 2, wherein the automatic gain control uses a variable gain amplifier.
4. The method of separating rf signals and digital signals according to claim 1, wherein in step 2, the differential balanced signal conversion is implemented by an ADC interface driver.
5. The method of separating a radio frequency signal and a digital signal according to claim 1, wherein the sampling is performed by an ADC module in step 2 or step 3.
6. The method of separating rf signal and digital signal according to claim 5, wherein in step 2, a band-pass anti-aliasing filter is provided before the ADC module for filtering out the clutter signals.
7. A circuit based on the method for separating rf signal and digital signal in claim 1, the circuit includes a bus interface, and a mixed signal of rf signal and digital signal is coupled to the bus interface, and further includes a power divider connected in series with the bus interface for dividing power of the mixed signal to obtain two sub-mixed signal channels;
one sub-mixed signal channel comprises an impedance matching module, a band-pass filtering module, a signal amplification module, a differential balance signal conversion module and a radio frequency signal sampling module which are sequentially connected in series;
the impedance matching module is used for filtering digital signals of low-frequency components in the sub-mixed signals; the band-pass filtering module is used for further attenuating the power of the digital signal in the sub-mixed signal on the basis of impedance matching; the signal amplification module is used for amplifying the power of the radio frequency signal only; the differential balance signal conversion module is used for converting the signals obtained in the last step into differential balance signals;
the other sub-mixed signal channel comprises a low-pass filtering module, an ADC driver module and a digital signal sampling module which are sequentially connected in series;
the low-pass filtering module is used for only passing the digital signal of the low-frequency component; the ADC driver module is used for simultaneously carrying out single-ended differential conversion and peak value attenuation, and the single-ended differential conversion is used for carrying out differential signal conversion on the signal obtained by the low-pass filtering module; the peak-to-peak attenuation is used for attenuating high-frequency components in the signal obtained after single-ended differential conversion.
8. A mixed signal separation device, characterized in that the mixed signal separation device comprises a processor for implementing the method of separating a radio frequency signal and a digital signal as claimed in any one of claims 1 to 6.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344070A (en) * | 2000-09-19 | 2002-04-10 | 王志颖 | Method for combining data signals with RF signals and transmitting then over cable of cable TV |
| CN2514590Y (en) * | 2001-11-29 | 2002-10-02 | 向祖璧 | Data television signal mixer |
| CN2802872Y (en) * | 2005-06-16 | 2006-08-02 | 向祖璧 | Bidirectional communication equipment based on wired TV. network |
| CN1889504A (en) * | 2006-06-07 | 2007-01-03 | 方勇 | Coaxle cable exchanging system and method |
| CN2882129Y (en) * | 2006-02-22 | 2007-03-21 | 上海傲蓝通信技术有限公司 | Signal multiplex and demultiplex device |
| CN2930155Y (en) * | 2006-02-22 | 2007-08-01 | 上海傲蓝通信技术有限公司 | Transmission device using coaxial cable mixed full business |
| CN200941620Y (en) * | 2006-07-31 | 2007-08-29 | 武汉诚源科技有限责任公司 | Ethernet transmitter based on wired TV coaxial cable |
| CN201584966U (en) * | 2010-01-26 | 2010-09-15 | 深圳市同洲电子股份有限公司 | System utilizing coaxial cable to transmit mixed signal |
| CN203840547U (en) * | 2013-08-27 | 2014-09-17 | 陕西天思信息科技有限公司 | Mobile signal coverage equipment based on EOC |
| CN109683513A (en) * | 2018-12-11 | 2019-04-26 | 天津津航计算技术研究所 | 100,000,000 1553B of one kind hair control simulated-bus front end |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983645Y (en) * | 2006-12-06 | 2007-11-28 | 赵志仁 | A broadband access system device of CATV coaxial cable network |
| US8870602B2 (en) * | 2011-07-14 | 2014-10-28 | Powerwave Technologies S.A.R.L. | Combination of radio frequency, high speed digital communication, and direct current signals in a single cable assembly |
| CN104467970A (en) * | 2014-11-28 | 2015-03-25 | 北京邮电大学 | Conversion device and method for transmitting signals in mixed mode |
-
2019
- 2019-12-19 CN CN201911316509.6A patent/CN111147095B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344070A (en) * | 2000-09-19 | 2002-04-10 | 王志颖 | Method for combining data signals with RF signals and transmitting then over cable of cable TV |
| CN2514590Y (en) * | 2001-11-29 | 2002-10-02 | 向祖璧 | Data television signal mixer |
| CN2802872Y (en) * | 2005-06-16 | 2006-08-02 | 向祖璧 | Bidirectional communication equipment based on wired TV. network |
| CN2882129Y (en) * | 2006-02-22 | 2007-03-21 | 上海傲蓝通信技术有限公司 | Signal multiplex and demultiplex device |
| CN2930155Y (en) * | 2006-02-22 | 2007-08-01 | 上海傲蓝通信技术有限公司 | Transmission device using coaxial cable mixed full business |
| CN1889504A (en) * | 2006-06-07 | 2007-01-03 | 方勇 | Coaxle cable exchanging system and method |
| CN200941620Y (en) * | 2006-07-31 | 2007-08-29 | 武汉诚源科技有限责任公司 | Ethernet transmitter based on wired TV coaxial cable |
| CN201584966U (en) * | 2010-01-26 | 2010-09-15 | 深圳市同洲电子股份有限公司 | System utilizing coaxial cable to transmit mixed signal |
| CN203840547U (en) * | 2013-08-27 | 2014-09-17 | 陕西天思信息科技有限公司 | Mobile signal coverage equipment based on EOC |
| CN109683513A (en) * | 2018-12-11 | 2019-04-26 | 天津津航计算技术研究所 | 100,000,000 1553B of one kind hair control simulated-bus front end |
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