CN201608734U - Multi-standard self-adaptive modulator-demodulator - Google Patents

Multi-standard self-adaptive modulator-demodulator Download PDF

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Publication number
CN201608734U
CN201608734U CN200920286157XU CN200920286157U CN201608734U CN 201608734 U CN201608734 U CN 201608734U CN 200920286157X U CN200920286157X U CN 200920286157XU CN 200920286157 U CN200920286157 U CN 200920286157U CN 201608734 U CN201608734 U CN 201608734U
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module
signal
modulation
data
demodulation
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蔡冰昊
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SHANGHAI XIETONG TECHNOLOGY Inc
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SHANGHAI XIETONG TECHNOLOGY Inc
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Abstract

The utility model relates to a multi-standard self-adaptive modulator-demodulator which is arranged between an external data source and an external radio-frequency module to perform digital modulation and demodulation on signals. The modulator-demodulator is characterized in that an input/output module is connected with the external data source to exchange data and is connected with the external radio-frequency module to exchange modulation-demodulation signals; a system control module can control the timing sequence of a sending module and a receiving module; a baseband processing module codes and scrambles the data signals after adding redundant information to generate signals to be modulated, decodes the coded digital signals after demodulating, rejects the redundant information and returns to the initial digital signals; the sending module transforms the coded digital signals into modulated signals and matches the modulated signals with the external radio-frequency module; and the receiving module is matched with the demodulated signals provided by the external radio-frequency module, performs parallel multi-standard demodulation on the demodulated signals and returns to the coded digital signals with the added redundant information.

Description

Multi-modulation scheme adaptive modulation-demodulation device
Technical field
The utility model belongs to the wireless narrow-band FM communications field, relates in particular to multiple based on frequency shift keyed digital modulation.
Background technology
In Modern Communication System, no matter be wire communication or radio communication, all use various digital modulation modes, for example FSK, MSK, GMSK come modulation signal to make it be fit to transmission more.All kinds of digital modems have also been used recent two decades widely in a large amount of industrial equipments, its speed develops quite rapid from the earliest tens bps tens Kbps till now.The stable operation for many years of these systems provides real-time authentic communication to the end user.
But the reliability service of communication system depends on lasting maintenance.Because various digital modulation modes is relatively independent, its corresponding equipment is also configuration separately often, and the maintenance of the multisystem of separation is consuming huge manpower and materials.Therefore, expect to have the Adaptable System of compatible each main flow modulation classification, make these various modulation systems energy merger in a system, can save a large amount of maintenance costs like this, also can be more calm, masterly when extending in system.
For instance, modulation systems such as 2FSK, MSK, 4Level-FSK, GMSK have mainly been used on the three present distant equipment, if provide a modulator-demodulator at these several most widely used modes, Auto-Sensing and compatible above-mentioned standard are quite favourable for system constructing and maintenance fully.
The utility model content
Technical problem to be solved in the utility model provides a kind of multi-modulation scheme adaptive modulation-demodulation device.
The utility model is that to solve the problems of the technologies described above the technical scheme that adopts be to propose a kind of multi-modulation scheme adaptive modulation-demodulation device, be used for externally data source and external radio frequency intermodule and carry out the digital modulation and the demodulation of signal, this modulator-demodulator comprises input/output module, system control module, baseband processing module, sending module, receiver module and power module.Input/output module is connected with external data source to carry out exchanges data, is connected to carry out the exchange of modulation-demodulation signal with the external radio frequency module.System control module is connected with baseband processing module with input/output module, with anti-shake, the shaping of carrying out data-signal and increase driving force; And system control module is connected with receiver module with sending module, with the sequential of control sending module and receiver module.Baseband processing module is connected with receiver module with sending module respectively, data-signal added redundant information is encoded, scrambler, modulation signal is treated in generation, and the coded digital signal after the demodulation is decoded, and rejects redundant information and reverts to original data signal.Sending module is connected with input/output module, converts the digital signal of encoding to modulation signal, and modulation signal and external radio frequency module are mated.Receiver module is connected with input/output module, and the restituted signal that provides with the external radio frequency module mates, and restituted signal is carried out the multi-modulation scheme parallel demodulation, recovers the coded digital signal that added redundant information.Power module provides suitable working power for input/output module, system control module, baseband processing module, sending module, receiver module.
In above-mentioned multi-modulation scheme adaptive modulation-demodulation device, input/output module comprises control signal interface, data-interface, audio interface and power interface.The control signal interface is connected with system control module with external data source, external radio frequency module.Data-interface is connected with external data source, system control module.Audio interface is connected with the external radio frequency module, and is connected with receiver module with sending module.Power interface is connected with power module.
In above-mentioned multi-modulation scheme adaptive modulation-demodulation device, system control module is connected with data-interface, control signal interface, and judges that according to data-signal and outside auxiliary signal also the switching of actual figure words, control audio interface are opened.
In above-mentioned multi-modulation scheme adaptive modulation-demodulation device, sending module comprises the modulation module and first amplifying circuit.Modulation module is in order to convert the modulation signal of different systems to according to the digital signal of encoding.The input of first amplifying circuit connects the output of modulation module, and output connects audio interface, in order to handling modulation signal, and with the external radio frequency module coupling that is coupled.
In above-mentioned multi-modulation scheme adaptive modulation-demodulation device, receiver module comprises second amplifying circuit and parallel demodulation module.The input of second amplifying circuit connects audio interface, in order to external radio frequency module be coupled coupling and processing restituted signal.The input of parallel demodulation module connects the output of second amplifying circuit, in order to according to default multiple standard parallel demodulation signal.
In above-mentioned multi-modulation scheme adaptive modulation-demodulation device, the filter capacitor that power module comprises a linear voltage decreasing adjustment pipe and is located at these adjustment pipe two ends.
Because the utility model has adopted above technical scheme, the multi-modulation scheme adaptive modulation-demodulation device of making is compared with prior art had the following advantages, that is: the compatibility of multi-modulation scheme, adopt flexibly the communication standard that is suitable for according to communication conditions, multisystem merges, reduces system cost.Whole proposal has the characteristics of high reliability and ease for use, and implements conveniently succinctly to help a large amount of deployment.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is the structured flowchart of the multi-modulation scheme adaptive modulation-demodulation device of the utility model one embodiment;
The concrete structure of the parton module of the multi-modulation scheme adaptive modulation-demodulation device of the Fig. 1 shown in Fig. 2;
Fig. 3 a-3e be among embodiment of the utility model signal flow to and electric theory diagram, wherein:
Fig. 3 a is the electric theory diagram of the embodiment of input/output module;
Fig. 3 b is the electric theory diagram of the embodiment of system control module;
Fig. 3 c is the electric theory diagram of the embodiment of sending module;
Fig. 3 d is the electric theory diagram of the embodiment of receiver module;
Fig. 3 e is the electric theory diagram of the embodiment of baseband processing module.
Embodiment
See also shown in Figure 1, this is the structured flowchart of the multi-modulation scheme adaptive modulation-demodulation device of the utility model one embodiment, and modulator-demodulator 1000 comprises input/output module 1, system control module 2, sending module 3, receiver module 4, baseband processing module 5 and power module 6.
With reference to shown in Figure 2, input/output module 1 can comprise control signal interface 11, data-interface 12, power interface 13 and audio interface 14.
A control signal interface 11 and an external data source 100, for example computer bidirectional connects, and with an external radio frequency module 200, for example two-way connection in radio station.In addition, control signal interface 11 and 2 two-way connections of system control module.The major function of this control signal interface is that the sequential of external data signal input and output is controlled, and the transmission of the modulation-demodulation signal of outside radio-frequency module 200 is controlled.
In a concrete application examples, control signal interface 11 can comprise the transmission request end (RTS) that is used to send request signal (RTS), the ready end serial signal ends such as (DTR) that is used to import standby ready signal (DTR), be used for conversation input (MIC) conversation input (MIC), be used for conversation output (SPK) the voice analog signal end of etc.ing of conversation output (SPK), and be used for the converse request communicating end (PTT) of (PTT) of input request.These ports are used for the transmission of control data signal and the transmission of voice signal.Control signal interface 11 also can comprise data-modulated control transmission signal end (TX), the request communicating end (MICPTT) that is used for request conversation (MICPTT), the reception detection signal end (CD) that is used to receive detection signal (CD) that is used for data-modulated control and sends signal (TX), the mute signal end (MUTE) that is used to export mute signal (MUTE).These ports are used to control the reception and the transmission of external radio frequency module.For example, send request end (RTS) and be used for control transmission data terminal (TD), reception detection signal end (CD) is used to detect the detection signal (CD) from the external radio frequency module, shows that the external radio frequency module receives external signal, or the like.
Data-interface 12 and external data source 100, for example computer bidirectional connects, and with 2 two-way connections of system control module.The major function of data-interface 12 is to the external data signal buffering of input, conversion and data-signal conversion, driving to exporting.In a concrete application examples, data-interface 12 can comprise that being used for input sends the transmission data terminal (TD) of data (TD) and the reception data terminal (RD) that is used to receive data (RD).These ports are used for transmission of data signals.For instance, send data terminal (TD) and be used for transmission of data signals transmission data (TD).
Audio interface 14 and external radio frequency module 200, for example two-way connection in radio station, and audio interface 14 and transmission amplification module 3,4 unidirectional connections of receiver module.The major function of audio interface is the Signal Spacing to outside radio-frequency module 200.In a concrete application examples, audio interface 14 can comprise the data modulated signal transmitting terminal (TFSK) that is used to send data modulated signal (TFSK), be used to restituted signal receiving terminal (RFSK) that sends the speech modulating signal transmitting terminal (MIC) of speech modulating signal (MIC) and be used for receiving demodulation signal (RFSK) etc.These ports are used for the output of modulation signal and the input of restituted signal.For example, data modulated signal end (TFSK) is used to transmit data modulated signal (TFSK).
Power interface 13 is connected with external radio frequency module 200, and power interface 13 is connected with power module 6, is used to receive the system power supply that the outside provides, and comprises the power end (VCC) that is used for power supply (VCC).
System control module 2 and control signal interface 11,12 two-way connections of data-interface with coding module 51,52 unidirectional connections of decoder module, are used for the signal transmission.And, system control module 2 and sending module 3,4 unidirectional connections of receiver module, and to the transmission signal control.
Sending module 3 comprises first amplifying circuit 31 and modulation module 32.First amplifying circuit 31 and system module 2, audio interface 14,32 unidirectional connections of modulation module.In a concrete application examples, first amplifying circuit 31 can comprise the modulation signal transmitting terminal (TFSK) that is used to send modulation signal (TFSK), and its effect is that the modulation signal that modulation module produces is amplified back and external radio-frequency signal module coupling.Modulation module 32 is linked in sequence with coding module 51, first amplifying circuit 31, is used for process encoded data signals (TD) is generated data modulated signal (TFSK) according to the rule of correspondence.
In embodiment of the present utility model, the standard that modulation module 32 can be modulated can comprise, 2FSK, MSK, 4Level-FSK, GMSK and other frequency shift keying.
Receiver module 4 comprises second amplifying circuit 41 and parallel demodulation module 42.Second amplifying circuit 41 and system module 2, audio interface 14,42 unidirectional connections of parallel demodulation module.In a concrete application examples, second amplifying circuit 41 can comprise the restituted signal receiving terminal (RFSK) that is used for receiving demodulation signal (RFSK), and its effect is that restituted signal (RFSK) and parallel demodulation module 42 are complementary, and all kinds of noise signals of filtering.Parallel demodulation module 42 and second amplifying circuit 41, decoder module 52 are linked in sequence, its effect is that restituted signal (RFSK) is carried out the multi-modulation scheme parallel demodulation, so that the data demodulates signal is recovered the data-signal (RD) that unique one group of correct coding is crossed according to rule.
In embodiment of the present utility model, the standard that parallel demodulation module 42 can demodulation can comprise 2FSK, MSK, 4Level-FSK, GMSK and other frequency shift keying.
Baseband processing module 5 comprises coding module 51 and decoder module 52.Coding module 51 is linked in sequence with system control module 2, modulation module 32, and its effect is according to the modulation system of system control module requirement data-signal to be changed, and adds the redundant information sign indicating number to sending data (TD), carries out error correction coding, interweaving encoding etc.Decoder module 52 is linked in sequence with parallel demodulation module 42, system control module 2, and its effect is to carry out to receiving data (RD) that reciprocal cross is knitted, error correction, picks out the redundant information sign indicating number of anti-interference usefulness.
Power module 6 is connected with input/output module 1, system control module 2, sending module 3, receiver module 4, baseband processing module 5, the power supply that becomes each module to use the external system power source conversion, and guarantee the clean of power supply.Usually, power module 6 can comprise a linear voltage decreasing adjustment pipe and be located at the filter capacitor that two ends are managed in this adjustment.
The part signal that Fig. 3 a～Fig. 3 f illustrates an embodiment of the utility model multi-modulation scheme adaptive modulation-demodulation device flows to and electric theory diagram.
See also Fig. 3 a, Fig. 3 a is the electric theory diagram of the embodiment of input/output module 1.Input/output module 1 is used for carrying out handshaking with external data source and radio-frequency module, and its middle port sends data terminal (TD), receives data terminal (RD), sends request end (RTS), ready end (DTR), is connected with external data source.
Port request communicating end (PTT), conversation input (MIC), modulation signal transmitting terminal (TFSK), restituted signal receiving terminal (RFSK), data-modulated control send signal end (TX), receive detection signal end (CD), are connected with the external radio frequency module.
See also Fig. 3 b, Fig. 3 b is the electric theory diagram of the embodiment of system control module 2.System control module is handled each auxiliary signal according to the data (RD) of the data (TD) that send, reception in the present embodiment.
See also Fig. 3 c, Fig. 3 c is the electric theory diagram of the embodiment of sending module 3.Comprise first filter amplification circuit in the present embodiment, it carries out digital-to-analogue conversion generation modulation signal (TFSK) to sending data (TD).
See also Fig. 3 d, Fig. 3 d is the electric theory diagram of the embodiment of receiver module 4.Comprise second filter amplification circuit in the present embodiment,, restituted signal (RFSK) is carried out analog-to-digital conversion produce received signal (RD) in order to handle modulation signal (RFSK).
See also Fig. 3 e, Fig. 3 e is the electric theory diagram of the embodiment of baseband processing module 5.Comprise coding module and decoder module in the present embodiment, it is encoded to sending data (TD), decodes to receiving data (RD).
Modulator-demodulator of the present utility model has the compatibility of multi-modulation scheme, adopts the communication standard that is suitable for flexibly according to communication conditions, and multisystem merges and the reduction system cost.Whole proposal has the characteristics of high reliability and ease for use, and implements conveniently succinctly to help a large amount of deployment.Modulator-demodulator of the present utility model can be from low speed to high speed, and for example speed is from 300bps to 200Kbps.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection range of the present utility model is worked as with being as the criterion that claims were defined.

Claims (6)

1. multi-modulation scheme adaptive modulation-demodulation device, be used for that externally data source and external radio frequency intermodule are carried out the digital modulation and the demodulation of signal, it is characterized in that, described modulator-demodulator comprises input/output module, system control module, baseband processing module, sending module, receiver module and power module, wherein:
Described input/output module is connected with external data source to carry out exchanges data, is connected to carry out the exchange of modulation-demodulation signal with the external radio frequency module;
System control module is connected with baseband processing module with input/output module, with anti-shake, the shaping of carrying out data-signal and increase driving force; And system control module is connected with receiver module with sending module, with the sequential of control sending module and receiver module;
Baseband processing module is connected with receiver module with sending module respectively, data-signal added redundant information is encoded, scrambler, modulation signal is treated in generation, and the coded digital signal after the demodulation is decoded, and rejects redundant information and reverts to original data signal;
Sending module is connected with input/output module, converts the digital signal of encoding to modulation signal, and modulation signal and external radio frequency module are mated;
Receiver module is connected with input/output module, and the restituted signal that provides with the external radio frequency module mates, and restituted signal is carried out the multi-modulation scheme parallel demodulation, recovers the coded digital signal that added redundant information; And
Power module provides suitable working power for input/output module, system control module, baseband processing module, sending module, receiver module.
2. multi-modulation scheme adaptive modulation-demodulation device as claimed in claim 1 is characterized in that described input/output module comprises control signal interface, data-interface, audio interface and power interface;
Described control signal interface is connected with system control module with external data source, external radio frequency module;
Described data-interface is connected with external data source, system control module;
Described audio interface is connected with the external radio frequency module, and is connected with receiver module with sending module;
Described power interface is connected with power module.
3. multi-modulation scheme adaptive modulation-demodulation device as claimed in claim 2, it is characterized in that, described system control module is connected with described data-interface, control signal interface, and judges that according to data-signal and outside auxiliary signal also the switching of actual figure words, control audio interface are opened.
4. multi-modulation scheme adaptive modulation-demodulation device as claimed in claim 1 is characterized in that described sending module comprises:
Modulation module is in order to convert the modulation signal of different systems to according to the digital signal of encoding; And
First amplifying circuit, its input connects the output of described modulation module, its output connects described audio interface, in order to handling modulation signal, and with the external radio frequency module coupling that is coupled.
5. multi-modulation scheme adaptive modulation-demodulation device as claimed in claim 1 is characterized in that described receiver module comprises:
Second amplifying circuit, its input connects audio interface, in order to external radio frequency module be coupled coupling and processing restituted signal; And
The parallel demodulation module, its input connects the output of second amplifying circuit, in order to according to default multiple standard parallel demodulation signal.
6. multi-modulation scheme adaptive modulation-demodulation device as claimed in claim 1 is characterized in that, the filter capacitor that described power module comprises a linear voltage decreasing adjustment pipe and is located at these adjustment pipe two ends.
CN200920286157XU 2009-12-24 2009-12-24 Multi-standard self-adaptive modulator-demodulator Expired - Fee Related CN201608734U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102271010A (en) * 2011-09-09 2011-12-07 联思普瑞(武汉)电子科技有限公司 Power carrier chip with power line busyness detection function
CN102281223A (en) * 2011-08-04 2011-12-14 联思普瑞(武汉)电子科技有限公司 All-digital MSK power carrier apparatus
CN104764913A (en) * 2015-04-23 2015-07-08 北京出入境检验检疫局检验检疫技术中心 Modulation reference source used for comparing specific absorption rate of wireless equipment with radiation performance test
CN109548016A (en) * 2019-01-03 2019-03-29 武汉思唯电子有限公司 Signal transmission method for preventing signal interference
CN111384993A (en) * 2020-03-20 2020-07-07 钟杰东 ZJD baseband chip and ZJD baseband chip management system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102281223A (en) * 2011-08-04 2011-12-14 联思普瑞(武汉)电子科技有限公司 All-digital MSK power carrier apparatus
CN102281223B (en) * 2011-08-04 2014-06-11 联思普瑞(武汉)电子科技有限公司 All-digital MSK power carrier apparatus
CN102271010A (en) * 2011-09-09 2011-12-07 联思普瑞(武汉)电子科技有限公司 Power carrier chip with power line busyness detection function
CN102271010B (en) * 2011-09-09 2013-11-06 联思普瑞(武汉)电子科技有限公司 Power carrier chip with power line busyness detection function
CN104764913A (en) * 2015-04-23 2015-07-08 北京出入境检验检疫局检验检疫技术中心 Modulation reference source used for comparing specific absorption rate of wireless equipment with radiation performance test
CN104764913B (en) * 2015-04-23 2017-06-23 北京出入境检验检疫局检验检疫技术中心 Wireless device specific absorption rate and radiance test are compared with modulation reference source
CN109548016A (en) * 2019-01-03 2019-03-29 武汉思唯电子有限公司 Signal transmission method for preventing signal interference
CN111384993A (en) * 2020-03-20 2020-07-07 钟杰东 ZJD baseband chip and ZJD baseband chip management system

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