CN108832957A - A kind of GSM multi-carrier transmitter - Google Patents
A kind of GSM multi-carrier transmitter Download PDFInfo
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- CN108832957A CN108832957A CN201810800757.7A CN201810800757A CN108832957A CN 108832957 A CN108832957 A CN 108832957A CN 201810800757 A CN201810800757 A CN 201810800757A CN 108832957 A CN108832957 A CN 108832957A
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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Abstract
The present embodiments relate to the communications fields, more particularly to a kind of GSM multi-carrier transmitter, for providing a kind of GSM multicarrier implementation that not only can guarantee the anti-interference ability of signals transmission but also can achieve the purpose that not will form mirror image each other between reduction system structure complexity and multicarrier.In the embodiment of the present invention, the nearly zero intermediate frequency signals of multichannel are formed for moving the frequency translation of I, Q Quadrature analog signal of baseband signal to nearly zero intermediate frequency by the nearly zero intermediate frequency signals conversion module of multichannel, wherein the frequency of the nearly zero intermediate frequency is 1020MHz；Multi-channel rf signal conversion module forms multichannel and emits radiofrequency signal for receiving and using the nearly zero intermediate frequency signals of the multichannel；Transceiver, for receiving and sending the multichannel transmitting radiofrequency signal, so as to not form mirror image each other between GSM multicarrier and reduce system complexity.
Description
Technical field
The present embodiments relate to the communications field more particularly to a kind of GSM multi-carrier transmitters.
Background technique
With the raising of data rate, when signal bandwidth is greater than the coherence bandwidth of channel, traditional GSM single-carrier system
In ISI (Inter Symbol Interference, intersymbol interference) become abnormal serious, affect the matter of signal transmission
Amount, and the serial data stream of high speed can be by being become the data flow of several low speed by multicarrier system, while modulating several loads
Wave can reduce ISI by channel delay spread, and therefore, GSM multicarrier system becomes the research hotspot of professional person.
In the prior art, have and GSM multicarrier system is realized by supradyne manner, also have and realized using zero intermediate frequency scheme
, but superhet and zero intermediate frequency scheme realize that multicarrier has certain problems, as superhet need to use more device, knot
Structure is complicated, and area occupied is big, with high costs；Zero intermediate frequency scheme can not solve the problems, such as carrier wave mirror image each other.
In conclusion GSM multicarrier implementation in the prior art exists, structure is complicated, at high cost, carrier wave mirror each other
The problem of picture, it is, therefore, desirable to provide a kind of effective GSM multicarrier implementation, both can guarantee the anti-dry of signals transmission
Disturbing ability again can achieve the purpose that not will form mirror image each other between reduction system structure complexity and multicarrier.
Summary of the invention
The embodiment of the invention provides a kind of GSM multi-carrier transmitters, real to solve GSM multicarrier in the prior art
Existing scheme has that structure is complicated, at high cost, carrier wave mirror image each other.
The embodiment of the present invention provides a kind of GSM multi-carrier transmitter, including：
The nearly zero intermediate frequency signals conversion module of multichannel, for moving the frequency translation of I, Q Quadrature analog signal of baseband signal to close
Zero intermediate frequency forms the nearly zero intermediate frequency signals of multichannel, wherein the frequency of the nearly zero intermediate frequency is 10-20MHz；
Multi-channel rf signal conversion module forms multichannel and emits radio frequency for receiving and using the nearly zero intermediate frequency signals of the multichannel
Signal；
Transceiver, for receiving and sending the multichannel transmitting radiofrequency signal.
Optionally, the nearly zero intermediate frequency signals conversion module of the multichannel includes：
Multiplier removes frequency and coded treatment for carrying out I, Q Quadrature analog signal, forms multiple signals；
Digital Up Convert module connect with the multiplier, for by the multiple signals per signal up-conversion all the way extremely
The nearly zero intermediate frequency forms the nearly zero intermediate frequency signals of multichannel.
Optionally, the nearly zero intermediate frequency signals conversion module of the multichannel further includes：
FIR filter is connect, for adjusting the width of the multiple signals with the multiplier and the Digital Up Convert module
Frequency characteristic and linear phase-frequency characteristic.
Optionally, the multi-channel rf signal conversion module is specifically used for the nearly zero intermediate frequency signals of the multichannel and presets this
The signal that shakes carries out Frequency mixing processing, forms multichannel and emits radiofrequency signal.
Optionally, the multi-channel rf signal conversion module is also used to filter out in the multi-channel rf signal after Frequency mixing processing
The interference signal of every road radiofrequency signal.
Optionally, the transceiver includes：
Power amplifier is connect with the multi-channel rf signal conversion module, for increasing in the multichannel transmitting radiofrequency signal
The transmission power of every road transmitting radiofrequency signal, obtains the amplified radiofrequency signal of multichannel；
Filter is connect with the power amplifier, is located at default frequency in the amplified radiofrequency signal of the multichannel for filtering out
Signal outside rate obtains radiofrequency signal to be sent；
Antenna element is connect with the filter, for sending the radiofrequency signal to be sent.
Optionally, the transceiver is also used to receive the radiofrequency signal to be received sent by other electronic equipments；It is described
Multi-channel rf signal conversion module is also used to for the radiofrequency signal to be received being mixed to the nearly zero intermediate frequency, and treated for acquisition
Intermediate-freuqncy signal；The nearly zero intermediate frequency signals conversion module of the multichannel is also used to the frequency translation of treated the intermediate-freuqncy signal extremely
Baseband frequency obtains and receives baseband signal.
Optionally, the multi-channel rf signal conversion module is realized by transmitting-receiving integrated chip.
Optionally, the multiplier, the FIR filter and the Digital Up Convert module are realized by FPGA.
Optionally, the filter is duplexer.
A kind of GSM multi-carrier transmitter is provided in the embodiment of the present invention, by the nearly zero intermediate frequency signals conversion module of multichannel,
For moving the frequency translation of I, Q Quadrature analog signal of baseband signal to nearly zero intermediate frequency, the nearly zero intermediate frequency signals of formation multichannel,
In, the frequency of the nearly zero intermediate frequency is 10-20MHz；Multi-channel rf signal conversion module, for receiving and utilizing the multichannel close
Zero intermediate frequency signals form multichannel and emit radiofrequency signal；Transceiver, for receiving and sending the skill of the multichannel transmitting radiofrequency signal
Art means, in this way, intermediate frequency to be arranged in the nearly zero intermediate frequency of 10-20MHz, when baseband signal passes through nearly zero intermediate frequency shape again after moving
After radiofrequency signal, the carrier wave of radiofrequency signal is just all distributed in certain side of local oscillation signal, in this way, the image frequency of carrier wave is just
It can fully fall in except bandwidth of operation, without falling on other carrier waves, to solve the load in zero intermediate frequency implementation
Wave each other mirror image the problem of；Meanwhile GSM multicarrier system is just only realized with less module in above scheme, reduce member
The type and quantity of device, structure complexity is substantially reduced, easy to accomplish, low in cost, also reduces the power consumption of whole system,
Reduce the volume of equipment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 is GSM multicarrier tradition zero intermediate frequency scheme distribution of carriers schematic diagram in the prior art；
Fig. 2 is a kind of structural block diagram of GSM multi-carrier transmitter provided in an embodiment of the present invention；
Fig. 3 is the distribution of carriers schematic diagram of GSM multi-carrier transmitter provided in an embodiment of the present invention；
Fig. 4 is that a kind of structure of GSM multi-carrier transmitter provided in an embodiment of the present invention realizes schematic diagram.
Specific embodiment
The embodiment of the invention provides a kind of GSM multi-carrier transmitters, real to solve GSM multicarrier in the prior art
Existing scheme has that structure is complicated, at high cost, carrier wave mirror image each other.
In a wireless communication system, the performance that sends and receivees of signal is to test the main indicator of communication system performance.With
Social progress, mobile communication grow rapidly, requirement of the mobile communication equipment to level of integrated system is higher and higher, superhet
Transceiver needs multiple local oscillators, intermediate-frequency filter and other peripheral components to constitute, and integrated level is low, and area occupied is big, Wu Fashi
Answer demand of the mobile communication equipment to integrated level；And traditional zero intermediate frequency transceiver is when realizing GSM multicarrier, multicarrier
Distribution schematic diagram as shown in Figure 1, so multicarrier operation interval just cannot Arbitrary distribution, and a certain carrier wave mirror image frequency fall
On other carrier waves, leads to intercarrier mirror image each other, influence the transmission quality of signal.
In order to solve the above-mentioned technical problem, the technical solution general thought in the embodiment of the present invention is as follows：
A kind of GSM multi-carrier transmitter is provided in the embodiment of the present invention, by the nearly zero intermediate frequency signals conversion module of multichannel, is used
It moves in by the frequency translation of I, Q Quadrature analog signal of baseband signal to nearly zero intermediate frequency, forms the nearly zero intermediate frequency signals of multichannel,
In, the frequency of the nearly zero intermediate frequency is 10-20MHz；Multi-channel rf signal conversion module, for receiving and utilizing the multichannel close
Zero intermediate frequency signals form multichannel and emit radiofrequency signal；Transceiver, for receiving and sending the skill of the multichannel transmitting radiofrequency signal
Art means, in this way, intermediate frequency to be arranged in the nearly zero intermediate frequency of 10-20MHz, when baseband signal passes through nearly zero intermediate frequency shape again after moving
After radiofrequency signal, the carrier wave of radiofrequency signal is just all distributed in certain side of local oscillation signal, in this way, the image frequency of carrier wave is just
It can fully fall in except bandwidth of operation, without falling on other carrier waves, to solve the load in zero intermediate frequency implementation
Wave each other mirror image the problem of；Meanwhile GSM multicarrier system is just only realized with less module in above scheme, reduce member
The type and quantity of device, structure complexity is substantially reduced, easy to accomplish, low in cost, also reduces the power consumption of whole system,
Reduce the volume of equipment.
In order to which the purpose of the present invention, technical solution and beneficial effect is more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
It please refers to shown in Fig. 2, is a kind of structural block diagram of GSM multi-carrier transmitter provided in an embodiment of the present invention, from Fig. 2
In as can be seen that the GSM multi-carrier transmitter include：The nearly zero intermediate frequency signals conversion module 10 of multichannel, multi-channel rf signal conversion
Module 20 and transceiver 30.Wherein, the nearly zero intermediate frequency signals conversion module 10 of multichannel, for by I, Q orthogonal mode of baseband signal
The frequency translation of quasi- signal is moved to nearly zero intermediate frequency, forms the nearly zero intermediate frequency signals of multichannel, wherein the frequency of the nearly zero intermediate frequency is
10-20MHz；Multi-channel rf signal conversion module 20 forms multichannel hair for receiving and using the nearly zero intermediate frequency signals of the multichannel
Penetrate radiofrequency signal；Transceiver 30, for receiving and sending the multichannel transmitting radiofrequency signal.
In the specific implementation process, the nearly zero intermediate frequency signals conversion module 10 of multichannel specifically can be ASIC (Application
Specific Integrated Circuit, application-specific integrated circuit), it can be one or more and held for controlling program
Capable integrated circuit can be and be opened using FPGA (Field Programmable GateArray, field programmable gate array)
The hardware circuit of hair.Multi-channel rf signal conversion module 20 specifically can be modulator or frequency mixer etc., be also possible to integrate
There is the chip of modulator function.Transceiver 30 specifically can be Anneta module, such as directional aerial, omnidirectional antenna etc., be also possible to
Other radio frequency signal receivers.
Above-mentioned GSM multi-carrier transmitter can be applied to the communication apparatus such as radio frequency sending set, smart phone, tablet computer
In, it is of course also possible to be the equipment that other need signal to send and receive, this is not restricted.
In embodiments of the present invention, the nearly zero intermediate frequency signals conversion module 10 of multichannel includes：
Multiplier 101 removes frequency and coded treatment for carrying out I, Q Quadrature analog signal, forms multiple signals；
Digital Up Convert module 102 connect with multiplier 101, for by the multiple signals per signal up-conversion all the way
To the nearly zero intermediate frequency, the nearly zero intermediate frequency signals of multichannel are formed.
In the specific implementation process, multiplier 101 can be individual integrated circuit, can also select with multiplier function
The FPGA of energy or the product of integrated multiplier, such as BG314, F1595, F1596；Similarly, Digital Up Convert module 102
It is also possible to individual integrated circuit, is also possible to be integrated with the product of Digital Up Convert function, details are not described herein.
Assuming that the I/Q data s (t) of base band=A*e-jwt, available by multiplier e-jk θ and Digital Up Convert
Multichannel carrier data, i.e., close zero intermediate frequency signals：
Wherein, A is the amplitude of the I/Q data of base band, and wt is the phase of the I/Q data of base band, and k θ is the phase offset of multiplier
Amount, k are multiplier number, the i.e. carrier number of GSM multicarrier.
In embodiments of the present invention, the nearly zero intermediate frequency signals conversion module 10 of multichannel further includes：
FIR filter 103 is connect, for adjusting the multiple signals with the multiplier and the Digital Up Convert module
Amplitude-frequency characteristic and linear phase-frequency characteristic.
In the specific implementation process, monolithic universal digital filter integrated circuit structure specifically can be used in FIR filter 103
At, dsp chip realization also can be used, programmable logic device realization also can be used, e.g., FPGA, CPLD, art technology
Personnel can select according to actual use demand.
When the I/Q data s (t) of base band is after the processing of multiplier, in order to keep the amplitude-frequency of subsequent nearly zero intermediate frequency signals special
Property and phase-frequency characteristic are met the requirements, and obtained signal can be adjusted its amplitude-frequency characteristic and phase-frequency characteristic by FIR filter.When
So, other filters can also be arranged in those skilled in the art according to actual needs, and this is not restricted.
In embodiments of the present invention, multi-channel rf signal conversion module 20 is specifically used for the nearly zero intermediate frequency signals of the multichannel
Frequency mixing processing is carried out with default local oscillation signal, multichannel is formed and emits radiofrequency signal.
After obtaining the nearly zero intermediate frequency signals of multichannel by the nearly zero intermediate frequency signals conversion module 10 of multichannel, by the nearly zero intermediate frequency of multichannel
Signal is transmitted in multi-channel rf signal conversion module 20 and is modulated.
Specifically, it is assumed that local oscillated signal is so multichannel carrier
After nearly zero intermediate frequency data are mixed with the same local oscillated signal, that is, it will form multi-channel rf signal, i.e.,：
Wherein, ALO is the amplitude of local oscillated signal, and wLOt is the phase of local oscillated signal.
In the specific implementation process, the frequency of local oscillated signal needs the nearly zero intermediate frequency of GSM sender according to the present invention
Frequency range selected.Multi-channel rf signal conversion module 20 can be specifically made of independent modulator or frequency mixer,
The integrated circuit for being also possible to be integrated with modulator function is realized.
In embodiments of the present invention, in order to eliminate the interference signal in radiofrequency signal, multi-channel rf signal conversion module 20
It is also used to filter out the interference signal of the road the multi-channel rf signal Zhong Mei radiofrequency signal after Frequency mixing processing.
In the specific implementation process, it when nearly zero intermediate frequency signals are during by Frequency mixing processing, may generate useless
Interference signal, as outside working frequency range signal or transmission process in caused by interference signal, at this point, then can be in multi-channel rf
The function of integrated digital filter, inhibits interference signal in signal conversion module 20.
After multi-channel rf signal conversion module 20 forms transmitting radiofrequency signal, then radiofrequency signal will be emitted by transceiver 30
Launch, transceiver 30 includes：
Power amplifier 301 is connect with the multi-channel rf signal conversion module 20, for increasing the multichannel transmitting radio frequency
The road signal Zhong Mei emits the transmission power of radiofrequency signal, obtains the amplified radiofrequency signal of multichannel；
Filter 302 is connect with the power amplifier 301, is located at for filtering out in the amplified radiofrequency signal of the multichannel
Signal outside predeterminated frequency obtains radiofrequency signal to be sent；
Antenna element 303 is connect with the filter 302, for sending the radiofrequency signal to be sent.
In the specific implementation process, power amplifier 301 specifically can be narrow-band high frequency power amplifier or broadband is high
Frequency power amplifier etc., device can be according to the key technical indexes of high frequency power amplifier when selecting：Output power, efficiency, function
Rate gain, bandwidth and harmonic wave degree of suppression etc. are selected；Antenna element 303 specifically can be the one-dimensional day being made of many electric wires
Line, as perhaps dipole antenna is also possible to the two-dimensional antenna with sheet or array-like to monopole.
Please refer to shown in Fig. 3, as in Fig. 3 it is found that using GSM sender provided by the embodiment of the present invention to base band believe
Number carry out that treated that GSM multicarrier can drop into except preset working frequency range about the image signal of local oscillation signal, this
The radio-frequency filter of sample periphery can also be filtered inhibition to it, no matter how multicarrier is distributed in working frequency range, arbitrarily
The image signal of carrier wave will not be all superimposed with the useful signal of other carrier waves, this just ensure that the transmission quality of signal well.
The distribution schematic diagram of its multicarrier is as shown in Fig. 1, wherein fIM1, fIM2, fIM3, and fIM4 is corresponding carrier signal fRF1,
The image frequency of fRF2, fRF3, fRF4.
Correspondingly, the transceiver 30 in the embodiment of the present invention be also used to receive sent by other electronic equipments it is to be received
Radiofrequency signal；Multi-channel rf signal conversion module 20 is also used to remove the radiofrequency signal to be received frequency to the nearly zero intermediate frequency,
Obtain treated radiofrequency signal；The nearly zero intermediate frequency signals conversion module 10 of multichannel is also used to treated the radiofrequency signal
Frequency translation obtains to baseband frequency and receives baseband signal.
In embodiments of the present invention, there is reception radiofrequency signal in order to reduce the volume of GSM sender while make it also
Function, the multi-channel rf signal conversion module 20 are specifically realized by transmitting-receiving integrated chip.The multiplier 101, FIR filter
Wave device 103 and the Digital Up Convert module 102 are realized by FPGA, wherein also with the place of Digital Down Convert function in FPGA
Manage module.The filter 302 is duplexer, referring to FIG. 4, for the structure of GSM multi-carrier transmitter in the embodiment of the present invention
Realize figure.In order to guarantee to receive the performance of radiofrequency signal, two individual function are specifically can be set into the power amplifier 301
Rate amplifier is connect with duplexer respectively such as power amplifier A and power amplifier B, forms two autonomous channels, wherein function
Rate amplifier A is used for the transmitting signal process of the sender, and power amplifier B is used for the reception signal mistake of the sender
Journey, at this point, power amplifier B is low noise amplifier.
In this way, in the transmitting link of above-mentioned GSM sender, the I/Q data of base band, after the multiplier of FPGA, benefit
Frequency coding is removed with the Digital Up Convert (DUC) of FPGA and forms multichannel data, then interpolation upconverts to nearly zero intermediate frequency, then by receiving
It sends out in integrated chip after digital filter, received and dispatched the modulator of integrated chip for the nearly zero intermediate frequency signals of multichannel and fixes local oscillator
After mixing, multi-channel rf signal is formed, is finally amplified by power amplifier, is launched after duplexer by antenna element.
In the receives link of above-mentioned GSM sender, antenna element receives radiofrequency signal, through duplexer filtering and low noise
The amplification of acoustical power amplifier downconverts to nearly zero intermediate frequency into transmitting-receiving integrated chip, by the low-pass filter of certain bandwidth, filter
Except the image frequency of carrier wave, then FPGA removes frequency to base band, transfers to subsequent digital base band processor.
In the specific implementation process, transmitting-receiving integrated chip specifically can be extremely low consumption wireless receiving and dispatching integrated chip CC1000,
It is also possible to highly integrated 60GHz radio transmitting and receiving chip group, is also possible to application-specific integrated circuit；FPGA can specifically be used
Parallel holotype or master slave mode or serial mode etc.；The selection of duplexer should be according to the transmitting and reception of GSM sender
Frequency customizes duplexer, and e.g., the bandwidth of operation of 400,000,000 transmitting-receiving frequency difference 10MHZ duplexers can guarantee isolation in ± 250kHZ
90db or so, single-frequency point work isolation up to 120db, when frequency of use is more than duplexer nominal bandwidth, receive-transmit isolation
Transmitting standing wave will sharply be declined to increase, receiving circuit because by emitting portion is influenced sensitivity decline cisco unity malfunction；Low noise
The noise factor of power amplifier can be lower than 3 decibels, and the requirement of low noise and high-gain in order to balance can be using transmitting altogether
The cascade low noise amplifier circuit of pole-common base is realized.
In embodiments of the present invention, baseband I/Q signal is passed through into multiplier and Digital Up Convert (DUC), is transformed into multichannel
Nearly zero intermediate frequency signals are significantly reduced the usage amount of device in equipment in this way, reduce the volume of equipment, convenient for the layout cloth of PCB
Line reduces the cost of equipment, while also can guarantee the ability that GSM signal resists intersymbol interference in transmission process, reduces direct current
And influence of the image frequency to signal, the performance of equipment is also assured on the basis of reducing equipment cost, does not influence making for user
With.Due to chosen in this programme to be the nearly zero intermediate frequency of 10-20MHz realize GSM multicarrier, no matter multicarrier is working
Section Arbitrary distribution, carrier wave image signal can be fallen in except working frequency range, and the filter of such rear end can believe its mirror image
Number inhibited.And the image signal of any carrier wave will not further ensure signal with other wanted carrier signal overlaps
Transmission quality.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of GSM multi-carrier transmitter, which is characterized in that including：
The nearly zero intermediate frequency signals conversion module of multichannel, for moving the frequency translation of I, Q Quadrature analog signal of baseband signal to close
Zero intermediate frequency forms the nearly zero intermediate frequency signals of multichannel, wherein the frequency of the nearly zero intermediate frequency is 10-20MHz；
Multi-channel rf signal conversion module forms multichannel and emits radio frequency for receiving and using the nearly zero intermediate frequency signals of the multichannel
Signal；
Transceiver, for receiving and sending the multichannel transmitting radiofrequency signal.
2. sender as described in claim 1, which is characterized in that the nearly zero intermediate frequency signals conversion module of the multichannel includes：
Multiplier removes frequency and coded treatment for carrying out I, Q Quadrature analog signal, forms multiple signals；
Digital Up Convert module connect with the multiplier, for by the multiple signals per signal up-conversion all the way extremely
The nearly zero intermediate frequency forms the nearly zero intermediate frequency signals of multichannel.
3. sender as claimed in claim 2, which is characterized in that the nearly zero intermediate frequency signals conversion module of the multichannel further includes：
FIR filter is connect, for adjusting the amplitude-frequency of the multiple signals with the multiplier and the Digital Up Convert module
Characteristic and linear phase-frequency characteristic.
4. sender as claimed in claim 2 or claim 3, which is characterized in that the multi-channel rf signal conversion module is specifically used for
The nearly zero intermediate frequency signals of the multichannel and default local oscillation signal are subjected to Frequency mixing processing, multichannel is formed and emits radiofrequency signal.
5. sender as claimed in claim 4, which is characterized in that the multi-channel rf signal conversion module be also used to filter out through
The interference signal of the road multi-channel rf signal Zhong Mei radiofrequency signal after Frequency mixing processing.
6. sender as claimed in claim 5, which is characterized in that the transceiver includes：
Power amplifier is connect with the multi-channel rf signal conversion module, for increasing in the multichannel transmitting radiofrequency signal
The transmission power of every road transmitting radiofrequency signal, obtains the amplified radiofrequency signal of multichannel；
Filter is connect with the power amplifier, is located at default frequency in the amplified radiofrequency signal of the multichannel for filtering out
Signal outside rate obtains radiofrequency signal to be sent；
Antenna element is connect with the filter, for sending the radiofrequency signal to be sent.
7. sender as described in claim 1, which is characterized in that the transceiver is also used to receive and be sent out by other electronic equipments
The radiofrequency signal to be received sent；The multi-channel rf signal conversion module is also used to for the radiofrequency signal to be received being mixed to
The nearly zero intermediate frequency obtains treated intermediate-freuqncy signal；The nearly zero intermediate frequency signals conversion module of the multichannel is also used to the place
The frequency translation of intermediate-freuqncy signal after reason obtains to baseband frequency and receives baseband signal.
8. sender as claimed in claim 7, which is characterized in that the multi-channel rf signal conversion module is by receiving and dispatching integrated core
Piece is realized.
9. sender as claimed in claim 3, which is characterized in that the multiplier, the FIR filter and it is described numerically
Frequency-variable module is realized by FPGA.
10. sender as claimed in claim 6, which is characterized in that the filter is duplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810800757.7A CN108832957A (en) | 2018-07-20 | 2018-07-20 | A kind of GSM multi-carrier transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810800757.7A CN108832957A (en) | 2018-07-20 | 2018-07-20 | A kind of GSM multi-carrier transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108832957A true CN108832957A (en) | 2018-11-16 |
Family
ID=64140514
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810800757.7A Withdrawn CN108832957A (en) | 2018-07-20 | 2018-07-20 | A kind of GSM multi-carrier transmitter |
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| CN (1) | CN108832957A (en) |
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2018
- 2018-07-20 CN CN201810800757.7A patent/CN108832957A/en not_active Withdrawn
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Application publication date: 20181116 |