CN1960224B - Signal multiplexing and demultiplexing device - Google Patents
Signal multiplexing and demultiplexing device Download PDFInfo
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- CN1960224B CN1960224B CN200510116898XA CN200510116898A CN1960224B CN 1960224 B CN1960224 B CN 1960224B CN 200510116898X A CN200510116898X A CN 200510116898XA CN 200510116898 A CN200510116898 A CN 200510116898A CN 1960224 B CN1960224 B CN 1960224B
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Abstract
The device consists of the public multiplexing interface unit, the DC separation circuit unit, the decay circuit unit, the AC restraint and filter circuit unit, the 1st filter unit and the 2nd filter unit. The 1st filter unit is in use for separating the frequency component signal while the 2nd filter unit is in use for separating remain signal other than frequency component signal. The same device, i.e. the hi-pass and low-pass filters satisfying a certain feature, realizes the multiplexing and de- multiplexing in this invention. These filters separate various frequencies of the multiplexing signal in a certain order and send them to the related frequency output port. The de-multiplexing process is an opposite process. The device not only raises the transfer medium utility, reduces the number of interfaces, lowers the cost, but also is easy of maintenance.
Description
Technical field
The present invention relates to field of signal transmissions in the communication system, be specifically related to a kind of multiple frequency signal that frequency division multiplexing is transmitted on same cable, comprise direct current signal, carry out multiplexing and device demultiplexing.
Background technology
In the communications field, the transmission of signals such as radiofrequency signal, intermediate-freuqncy signal, low frequency signal, DC feedback signal is a unavoidable problem.For some system, there is multiple frequency signal simultaneously, if provide a kind of transmission medium specially for every kind of frequency signal, under the miscellaneous situation of frequency signal, can make the more complicated of system's change, kind of interface and cost all can increase, and system maintainability is descended.Therefore with multiple frequency signal multiplexing transmit on a kind of medium become essential.
On the multiplex mode of signal, be divided into multiple signal multiplexing modes such as time division multiplexing, frequency division multiplexing, space division multiplexing.For the signal of multiple frequency, can adopt the mode of frequency division multiplexing very easily, signal multiplexing is transmitted on same transmission medium.So just need send and the multiplexing and Deplexing apparatus of receiving terminal modelled signal.
Publication number is CN1399437A, the open date is the invention " undersized multichannel Frequency reuser " on February 26th, 2003, its content is a kind of multichannel Frequency reuser that combiner and divider functions are arranged, its structure comprises a N*N frequency resonance device matrix, this frequency resonance matrix has the channel input port, each resonator and a public resonator interconnection, public resonator is coupled to a public output port again.The arrangement of a plurality of resonators makes them that the function of frequency selection and combination is provided with small size.The use of public resonator has reduced the phase difference that connects between resonator and has made and inserted the loss minimum.
From another angle, the described device of foregoing invention can also be as a kind of frequency divider, the multiplexed signals of different frequency is passed through a public input port and public resonator, a plurality of resonant cavitys of resonance are connected with this public resonator on different frequency, different frequency signals is separated, and deliver to corresponding output port.
" undersized multichannel Frequency reuser " invention has proposed a kind of scheme that realizes multiple channeling and demultiplexing by resonator, the device advantage that this invention realizes is that plant bulk is very little, but its shortcoming also is very outstanding, be primarily aimed at some fixedly frequency signal multiplexing, frequency is the realization difference of resonator simultaneously not, and this just makes this device very poor to the signal multiplexing adaptability of certain limit frequency.
Publication number is CN1520650A, and the open date is " frequency offset diversity receiver " on August 11st, 2004, and the major function of the device that this invention will realize has:
Make up at least two modulated RF input signals to form single RF skew diversity signal;
Single RF signal transformation becomes baseband signal;
Frequency demultiplexing baseband signal is to provide each modulated baseband signal;
The signal of combination demultiplexing is to provide output.
But the device of being realized in the invention " frequency offset diversity receiver " has increased the process of signal transformation between signal multiplexing and demultiplexing, therefore in the realization in whole process very big complexity is arranged, scope aspect that in addition should invention application at be the RF signal.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes the device of the multiplexing and demultiplexing of a kind of frequency signal, because this device is realized by passive device, so allow signal in this device, to carry out bi-directional, so the multiplexing and demultiplexing of signal can utilize same device to realize.
The present invention specifically is achieved in that
A kind of signal multiplexing and Deplexing apparatus comprise as the lower part:
Public multiplexed inter is used for the physical interface of multiplexed signals input and output;
The block isolating circuit unit is used for finishing DC component in the multiplexed signals is isolated;
The attenuator circuit unit is used for finishing the power attenuation to superposed signal;
First filter cell is used for the cross frequence component signal;
Second filter cell is used for the outer residual signal of cross frequence component signal;
Outside multiplexed signals is from public multiplexed inter input, through the block isolating circuit unit, separate the multiplexed signals that obtains having multiple AC signal component, after described then multiplexed signals is finished the power attenuation of superposed signal through the attenuator circuit unit, one by one the Signal Separation of various frequency components is come out from high to low or from low to high by signal frequency through first filter cell and second filter cell successively, and deliver to corresponding output port.
Described signal multiplexing and Deplexing apparatus can also comprise:
Exchange and suppress circuit unit, be used for finishing and isolate direct current signal from multiplexed signals;
The filter circuit unit is used to finish the Filtering Processing to direct current signal;
Described multiplexed signals is isolated direct current signal through exchanging the inhibition circuit unit, then by output DC component after the filter circuit cell processing through behind the public multiplexed inter.
Described public multiplexed inter can adopt SMA type socket.
Described interchange suppresses circuit unit, can adopt air core inductor.
Described filter circuit unit can adopt capacitor filter.
Described block isolating circuit unit can adopt capacitance to realize.
Described attenuator circuit unit can adopt π type resistor network to realize.
The number of the filter that is adopted in described first filter cell and second filter cell is: the integer greater than 1.
Frequency difference is at 2 more than the order of magnitude between the described multiplexed signals;
The upper limit of described multiplexed signals frequency should be in hundred MHz levels.
Described multiplexing and Deplexing apparatus also is applicable to the multiplexing of radiofrequency signal.
Device of the present invention has following advantage:
1. improve the utilance of transmission medium by this device, reduced interface quantity, reduced cost, also made things convenient for maintenance;
2. this device has stronger adaptive capacity, and by the appropriate designs of filter, each port (non-multiplexing port) can satisfy the I/O of certain limit frequency signal, rather than can only be at the fixedly I/O of the signal of frequency;
3. this device is mainly finished by resistor network, filter circuit in realization, and these technology are all very ripe, therefore realize easily.
Description of drawings
Fig. 1 is that the multiplexing and Deplexing apparatus of signal is realized block diagram;
Fig. 2 is a specific implementation example of device of the present invention.
Embodiment
Device of the present invention comprises with the lower part, public multiplexed inter 101, exchange to suppress wherein 1＜k=n-1 and be integer, second filter cell 2Y～nY (107/110/113) of circuit unit 102, filter circuit unit 103, block isolating circuit unit 104, attenuator circuit unit 1～3 (105/108/111) and first filter cell 1X～kX (106/109/112).
Public multiplexed inter 101 is the physical interface of multiplexed signals input and output; Interchange inhibition circuit unit 102 is finished and isolate direct current signal from multiplexed signals; Filter circuit unit 103 is finished the direct current signal Filtering Processing; The isolation to direct current signal in the multiplexed signals is finished in block isolating circuit unit 104; The power attenuation to superposed signal is mainly finished in attenuator circuit unit 1～3 (105/108/111); To be some satisfy certain high pass/low pass filter according to what signal frequency to be separated designed to filter cell 1X～kX (106/109/112); The main corresponding outer residual signal of filter cell 1X～kX institute cross frequence component signal of isolating of filter cell 2Y～nY (107/110/113), therefore filter cell 2Y～nY is and the corresponding low-pass/high-pass filter of filter cell 1X～kX that these filters are determined according to multiplexed signals component frequency to be separated.
The demultiplexing flow process of signal is as follows: outside multiplexed signals is imported from Unit 101, isolates direct current signal through Unit 102, and after 103 cell processing output DC component; Another passage, outside multiplexed signals is imported from Unit 101 after 104 unit filtering direct current signal components, separate the multiplexed signals that obtains having multiple AC signal component, this multiplexed signals comes out the Signal Separation of various frequency components one by one from high to low or from low to high by frequency, and delivers to corresponding output port through attenuator circuit unit (as 105), filter cell (as 1X, 2Y).
The multiplex process of signal then is an opposite process, and each signal component is from port input separately, and it is multiplexing to superpose step by step through corresponding passage, at last from 101 outputs of public multiplexing port.
From the process of demultiplexing, mainly utilize some high pass filter that satisfies certain characteristic and low pass filters, one by one the various frequency components in the multiplexed signals are separated according to a certain order, deliver to the correspondent frequency output port.
For multiplex process, then be a rightabout process.For the bigger signal of frequency difference, can on same transmission medium, superpose and do not disturb mutually, so each frequency component signal can by device of the present invention, be multiplexed into same port output at last from port input separately.
The scope of application of device of the present invention: 1. wider range of the multiplexed signals supported of this device can be from the direct current signal to the radiofrequency signal.But, carrying out between the multiplexing signal frequency band of living in preferably is separated by bigger, so that the filter of designing can carry out the signal demultiplexing preferably, here advise between the multiplexed signals that frequency difference is at 2 more than the order of magnitude, on the other hand, the multiplexed signals upper frequency limit is controlled at hundred MHz levels, for the corresponding filter circuit difficult design of the extra high radiofrequency signal of frequency (such as the signal more than the GHz), suggestion utilizes device of the present invention to carry out signal multiplexing after earlier this class radiofrequency signal being become baseband signal again;
2. non-multiplexing input/output end port can be supported the I/O of certain limit frequency signal according to Filter Design in the device of the present invention;
3. device of the present invention can be designed to the form of an independent device, and a module that also can be used as on the veneer circuit is used, and can also become the form of a cover plug-in card to use according to separation signal frequency range different designs.
Fig. 2 has provided the signal multiplexing of the present invention's proposition and a specific implementation example of Deplexing apparatus, introduces specific implementation of the present invention below in conjunction with Fig. 2.
Certain input and output physical interface need be selected according to the applicable cases of reality in multiplexing port unit 101, such as selecting SMA type socket in this example.
Exchanging inhibition circuit 102 selects air core inductors that AC signal is suppressed.Filter circuit 103 adopts certain capacitor filter to realize.
By increasing power inductance, mainly be that the bigger direct current signal of power is realized choking effect in Fig. 2 circuit.
Block isolating circuit 104 is realized by a capacitance.
Attenuator circuit (105/108/111) can be realized by a π type resistor network, this resistor network is realized signal attenuation 3dB, promptly realize signal power decay approximate half, mainly for the amplitude of considering before amplitude fading with superposed signal returns stack, to guarantee the consistency of signal amplitude.π type resistor network is realized more flexible, can select resistance as required, realizes the differential declines of signal.
This device easy to use, simple, method is as follows: 1. each signal component is connected on the port that can separate this signal component; 2. outside I/O multiplexed signals is connected on the public multiplexing port of this device; 3. by non-multiplexing port input signal, from the multiplexing output of multiplexing port; By multiplexing port input multiplexed signals, behind this device demultiplexing, from corresponding non-multiplexing port output.
Claims (10)
1. signal multiplexing and Deplexing apparatus is characterized in that, comprise as the lower part:
Public multiplexed inter is used for the physical interface of multiplexed signals input and output;
The block isolating circuit unit is used for finishing DC component in the multiplexed signals is isolated;
The attenuator circuit unit is used for finishing the power attenuation to superposed signal;
First filter cell is used for the cross frequence component signal;
Second filter cell is used for the outer residual signal of cross frequence component signal;
Outside multiplexed signals is from public multiplexed inter input, through the block isolating circuit unit, separate the multiplexed signals that obtains having multiple AC signal component, after described then multiplexed signals is finished the power attenuation of superposed signal through the attenuator circuit unit, one by one the Signal Separation of various frequency components is come out from high to low or from low to high by frequency through first filter cell and second filter cell successively, and deliver to corresponding output port.
2. signal multiplexing as claimed in claim 1 and Deplexing apparatus is characterized in that, described signal multiplexing and Deplexing apparatus also comprise:
Exchange and suppress circuit unit, be used for finishing and isolate direct current signal from multiplexed signals;
The filter circuit unit is used to finish to the direct current signal Filtering Processing;
Described multiplexed signals is isolated direct current signal by exchanging the inhibition circuit unit, then by output DC component after the filter circuit cell processing through behind the public multiplexed inter.
3. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
Described public multiplexed inter adopts SMA type socket.
4. signal multiplexing as claimed in claim 2 and Deplexing apparatus is characterized in that:
Described interchange suppresses circuit unit, adopts air core inductor.
5. signal multiplexing as claimed in claim 2 and Deplexing apparatus is characterized in that:
Described filter circuit unit adopts capacitor filter.
6. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
Described block isolating circuit unit adopts capacitance to realize.
7. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
Described attenuator circuit unit adopts π type resistor network to realize.
8. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
The number of the filter that is adopted in described first filter cell and second filter cell is: the integer greater than 1.
9. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
Frequency difference is at 2 more than the order of magnitude between the described multiplexed signals;
The upper limit of described multiplexed signals frequency should be in hundred MHz levels.
10. signal multiplexing as claimed in claim 1 or 2 and Deplexing apparatus is characterized in that:
Described signal multiplexing and Deplexing apparatus are applicable to the multiplexing of radiofrequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510116898XA CN1960224B (en) | 2005-10-31 | 2005-10-31 | Signal multiplexing and demultiplexing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510116898XA CN1960224B (en) | 2005-10-31 | 2005-10-31 | Signal multiplexing and demultiplexing device |
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| Publication Number | Publication Date |
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| CN1960224A CN1960224A (en) | 2007-05-09 |
| CN1960224B true CN1960224B (en) | 2010-04-07 |
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| CN200510116898XA Active CN1960224B (en) | 2005-10-31 | 2005-10-31 | Signal multiplexing and demultiplexing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102831093A (en) * | 2010-02-04 | 2012-12-19 | 矽力杰半导体技术(杭州)有限公司 | Multiplexing circuit and multiplexing method for chip pin |
| CN109302203B (en) * | 2018-11-19 | 2024-04-02 | 江苏卓胜微电子股份有限公司 | Radio frequency front end port multiplexing circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399437A (en) * | 2001-07-10 | 2003-02-26 | 无线电射频***公司 | Small-size multichannel frequency sharer |
| CN1520650A (en) * | 2001-06-27 | 2004-08-11 | �ʼҷ����ֵ�������˾ | Frequency offset diversity receiver |
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2005
- 2005-10-31 CN CN200510116898XA patent/CN1960224B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1520650A (en) * | 2001-06-27 | 2004-08-11 | �ʼҷ����ֵ�������˾ | Frequency offset diversity receiver |
| CN1399437A (en) * | 2001-07-10 | 2003-02-26 | 无线电射频***公司 | Small-size multichannel frequency sharer |
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| CN1960224A (en) | 2007-05-09 |
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