CN114584164A - Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication - Google Patents
Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication Download PDFInfo
- Publication number
- CN114584164A CN114584164A CN202210089378.8A CN202210089378A CN114584164A CN 114584164 A CN114584164 A CN 114584164A CN 202210089378 A CN202210089378 A CN 202210089378A CN 114584164 A CN114584164 A CN 114584164A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- radio frequency
- communication
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 87
- 230000010355 oscillation Effects 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application provides a frequency band reconfigurable radio frequency receiver front end facing multi-standard communication, wherein the receiver comprises a receiving module, wherein a low-noise amplifier in the receiving module receives a radio frequency signal and performs low-noise amplification on the received radio frequency signal; the radio frequency switch is used for selecting a communication frequency channel and inputting the radio frequency signal amplified by low noise to a radio frequency filter corresponding to the selected communication frequency channel for radio frequency filtering; inputting the radio-frequency signal subjected to radio-frequency filtering and a first local oscillator signal into a first-stage frequency converter for down-conversion to obtain an intermediate-frequency signal; the intermediate frequency signal is filtered and amplified by an intermediate frequency filter and a power amplifier respectively; inputting the filtered and amplified intermediate frequency signal and a second local oscillation signal into a demodulator for demodulation to obtain a baseband I/Q signal; the baseband I/Q signal passes through a variable gain amplifier and a baseband programmable filter to carry out gain control and low-pass filtering control. The invention is suitable for Wi-Fi and 5G communication, has reconfigurability and is suitable for various communication scenes.
Description
Technical Field
The application relates to the technical field of radio frequency, in particular to a frequency band reconfigurable radio frequency receiver front end facing multi-standard communication.
Background
With the rapid development of science and technology and society, 3G and 4G communication cannot meet the requirements of human beings, and the 5G communication technology as a brand-new mobile communication technology has become a necessary trend to replace the 3G and 4G technologies. The 5G communication technology has great advantages, especially in data transmission. The bandwidth provided by the 5G technology can meet the requirements of most people, help users to obtain better experience, and improve the communication rate. Currently, the use of 5G and WLAN is becoming more and more common.
At present, most radio frequency receivers used in wireless communication systems adopt a structure of a superheterodyne receiver, and compared with other existing radio frequency receiver structures, the structure has better performance and can meet the requirements of high-performance narrow-band and wide-band receivers. The superheterodyne receiver can reasonably distribute the gain, avoid the self-excitation of the amplifier caused by the over-high gain of a single stage, and the lower intermediate frequency amplifier is more beneficial to the realization of the design. Because of adopting frequency conversion for many times, the radio frequency signal can enter the circuit only by the intermediate frequency which has a fixed difference with the local oscillation signal, and a plurality of good filters with high selectivity are provided, so that other interference signals can be inhibited, and the selectivity is improved.
Fig. 1 is a schematic diagram of a basic architecture of a conventional superheterodyne receiver. In a traditional superheterodyne receiver, a radio frequency signal received by an antenna is filtered by a Band Pass Filter (BPF), is amplified by a Low Noise Amplifier (LNA) and then is mixed with a first local oscillator signal, so that the radio frequency signal is down-converted to a fixed intermediate frequency, then enters a demodulator together with a second local oscillator signal after being amplified by the Band Pass Filter (BPF) and an intermediate frequency Power Amplifier (PA), the demodulator outputs two paths of I, Q orthogonal signals with a phase difference of 90 degrees, and then I, Q signals enter a Low Pass Filter (LPF) respectively for filtering. As shown in fig. 1, the existing superheterodyne receiver has a single frequency band, a fixed structure, and no suitability for multimode communication, and has limitations. In addition, the bandwidth of the conventional superheterodyne receiver is not adjustable and has fixity, but the bandwidth required by different current communication standards is different, which results in that the communication rate is influenced by adopting a receiver with a smaller receiving bandwidth. Moreover, the local oscillation frequency of the conventional superheterodyne receiver is not adjustable or the adjustable range is too small, and the conventional superheterodyne receiver is difficult to be applied to different communication modes. In addition, the influence of image interference on the conventional superheterodyne receiver is also large. At present, a plurality of communication standards (such as WLAN and 5G communication standards) exist, the requirements on flexibility and reconfigurability of a system are higher and higher, and the conventional superheterodyne receiver cannot meet the use requirements of high speed, high flexibility, high selectivity and software nowadays.
In summary, due to the rapid development of communication, the conventional wireless transceiver cannot meet the future communication requirement, and how to provide a high-rate, high-flexibility and reconfigurable wireless receiver oriented to multi-standard communication is a problem to be solved.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a frequency band reconfigurable radio frequency receiver front end facing multi-standard communication, which adjusts the bandwidth, improves the communication speed and overcomes one or more defects in the prior art.
The technical scheme of the invention is as follows:
in one aspect of the present invention, a band reconfigurable radio frequency receiver front end is provided, which includes a receiving module;
the receiving module includes: the system comprises a low noise amplifier, a radio frequency switch, a plurality of radio frequency filters corresponding to a plurality of communication frequency band channels, a first-stage frequency converter, an intermediate frequency filter, a power amplifier, a demodulator, a variable gain amplifier and a baseband programmable filter;
the low-noise amplifier receives the radio-frequency signal from the antenna of the receiver and performs low-noise amplification on the received radio-frequency signal;
the radio frequency switch is used for selecting a communication frequency channel and inputting the radio frequency signal amplified by low noise to a radio frequency filter corresponding to the selected communication frequency channel for radio frequency filtering;
inputting the radio-frequency signal subjected to radio-frequency filtering and a first local oscillator signal into the first-stage frequency converter for down-conversion to obtain an intermediate-frequency signal;
the intermediate frequency signal is filtered and amplified by the intermediate frequency filter and the power amplifier respectively;
inputting the filtered and amplified intermediate frequency signal and a second local oscillation signal into the demodulator for demodulation to obtain a baseband I/Q signal;
and the baseband I/Q signal passes through the variable gain amplifier and the baseband programmable filter to carry out gain control and low-pass filtering control, so that a signal with a preset bandwidth is obtained.
In some embodiments of the present invention, the front end of the radio frequency receiver further includes a control module and a local oscillation module; the control module is electrically connected with the radio frequency switch, the local oscillator module, the variable gain amplifier and the baseband programmable filter and is used for logically controlling the radio frequency switch, the local oscillator module, the variable gain amplifier and the baseband programmable filter through an SPI bus; the local oscillation module is used for generating the first local oscillation signal and the second local oscillation signal based on the control of the control module.
In some embodiments of the present invention, the rf receiver front-end further comprises: and the power supply module is used for supplying power to the receiving module, the control module and the local oscillation module.
In some embodiments of the present invention, the frequency bands corresponding to the plurality of communication frequency band channels include more than two frequency bands of 2.4 to 2.5GHz, 3.3 to 3.6GHz, and 4.8 to 6 GHz; the plurality of radio frequency filters corresponding to the plurality of communication frequency band channels are used for obtaining radio frequency signals of frequency bands corresponding to the plurality of communication frequency band channels.
In some embodiments of the present invention, the rf switch is a controllable multi-channel switch, and the input terminal of the controllable multi-channel switch is connected to the low noise amplifier, and the output terminal of the controllable multi-channel switch is connected to the plurality of rf filters; the control module selects a communication frequency band channel by controlling the logic high and low levels of the radio frequency switch, so as to realize the control of the required channel.
In some embodiments of the present invention, the first local oscillator signal is a signal of 1.4 to 1.5GHz, 2.3 to 2.6GHz, or 3.8 to 5.0GHz, and the second local oscillator signal is a 1GHz signal.
In some embodiments of the present invention, the first stage frequency converter includes a double balanced active mixer and a local oscillator buffer amplifier, and the output intermediate frequency signal is a 1GHz intermediate frequency signal.
In some embodiments of the invention, the demodulator has an amplitude balance and a phase balance of 0.07dB and 0.2 °, respectively, and the leakage from the linear output port of the power amplifier to the intermediate frequency port is less than-50 dBm; the baseband programmable filter has a breakover frequency of 0 to 63MHz and stepped to 1 MHz; the variable gain amplifier is capable of providing fixed gains of 9dB, 12dB and 15 dB.
In some embodiments of the invention the demodulator comprises two mixers for converting the intermediate frequency signal into a baseband in-phase signal and a baseband quadrature signal and a phase shifter for phase shifting the second local oscillator signal by 90 °.
In some embodiments of the present invention, the rf filter is configured to filter out a stray rf signal received by the antenna; the intermediate frequency filter is used for filtering signals except the intermediate frequency signals; the baseband programmable filter is used for controlling the selection of the bandwidth of the adaptive signal through software.
In another aspect of the present invention, there is also provided a band reconfigurable radio frequency receiver, including the band reconfigurable radio frequency receiver front-end as described above.
According to the technical scheme, the frequency band reconfigurable radio frequency receiver for the multi-standard communication is suitable for Wi-Fi communication and 5G communication, can support the current most popular communication frequency band, can adjust the bandwidth at any time, improves the communication speed, and can adjust the local oscillator output in real time according to radio frequency signals. In addition, the invention can carry out multiple filtering at radio frequency, intermediate frequency and baseband, greatly improves the anti-interference capability, has reconfigurability and reduces the complex cost of the system.
The embodiment of the invention can control the adjustable filter of the baseband through software to change the signal receiving bandwidth so as to be suitable for different communication modes. The reconfigurable receiver can adjust various modules through software, can work in a plurality of communication modes, and can flexibly change the bandwidth.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional superheterodyne receiver structure.
Fig. 2 is a schematic structural diagram of a band reconfigurable rf receiver front end for multi-standard communication according to an embodiment of the present invention.
Fig. 3 is a schematic block diagram of a band reconfigurable rf receiver front-end for multi-standard communication according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of an internal structure of a demodulator of a front end of a band reconfigurable radio frequency receiver according to an embodiment of the present invention.
Reference numerals:
1: a receiving module; 2: a local oscillation module; 3: a control module; 4: a power supply module; 5: a low noise amplifier;
6. a radio frequency switch; 7: a radio frequency filter; 8: a mixer; 9: a first local oscillator; 10: an intermediate frequency filter;
11: a power amplifier; 12: a demodulator; 13: a second local oscillator; 14: an adjustable low-pass filter;
15: a baseband variable gain amplifier.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the exemplary embodiments and descriptions thereof are only for explaining the present invention and are not to be construed as limiting the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
It should be emphasized that the term "comprises/comprising/comprises/having" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It is clear from the development of communication technology in the past generations that the bandwidth of signals is constantly increasing, from 200KHz before to 100MHz now, and even higher signal bandwidths are available. Therefore, there is a need for a radio frequency receiver that accommodates large bandwidths.
Aiming at a plurality of problems of the traditional superheterodyne receiver, the invention provides a frequency band reconfigurable radio frequency receiver front end facing multi-standard communication, which can work in a WLAN frequency band and a main frequency band of 5G, and can adjust the bandwidth of a received signal through software. In the preferred embodiment of the present invention, the rf receiver employs a super-heterodyne receiver architecture, which is an innovative improvement over conventional super-heterodyne receivers.
In some embodiments of the present invention, the local oscillation module is also designed to be independent and innovative, and the output of the local oscillation source can be adjusted in real time according to different input radio frequency signals, so that the system has more independence. For different bandwidths of various communications at present, the embodiment of the invention can control the adjustable filter of the baseband through software to change the signal receiving bandwidth so as to adapt to different communication modes. The reconfigurable receiver which can adjust various modules through software, can work in various communication modes and can flexibly change the bandwidth is remarkably superior to the traditional superheterodyne receiver.
Fig. 2 is a schematic structural diagram of a band reconfigurable rf receiver front-end for multi-standard communication according to an embodiment of the present invention. As shown in fig. 2, the band reconfigurable radio frequency receiver front-end for multi-standard communication includes: a receiving module 1. The input of the receiving module 1 is a radio frequency signal received by an antenna, and the output end is connected with a digital signal processing part of a receiver.
The receiving module 1 may specifically include: the low noise amplifier 5, the radio frequency switch 6, a plurality of radio frequency filters 7 corresponding to a plurality of communication frequency band channels, a first stage frequency converter 8, an intermediate frequency filter 10, a power amplifier 11, a demodulator 12, a baseband programmable filter 14 and a variable gain amplifier 15.
The low noise amplifier 5 receives a radio frequency signal from the receiver antenna, and performs low noise amplification on the received radio frequency signal. In an embodiment of the present invention, the low noise amplifier 5 may adopt a PMA3-63GLN + having a noise figure of 0.6dB and a gain of 29.7dB, but the present invention is not limited thereto, and may be a low noise amplifier having similar performance. The radio frequency signal from the antenna firstly enters the input end of the low noise amplifier, and the noise coefficient is low, and the low noise amplifier is arranged at the forefront end of the system, so that the noise coefficient of the whole receiver system is kept at a better level, and the receiving sensitivity is greatly improved.
The radio frequency switch 6 is used for selecting a communication frequency channel, and inputting the radio frequency signal amplified by low noise to a radio frequency filter 7 corresponding to the selected communication frequency channel for radio frequency filtering. The input ends of the radio frequency filters 7 are connected with the radio frequency switch, the output ends of the radio frequency filters are connected with the first-stage frequency converter, and the radio frequency filters are used for selecting required radio frequency signals to enter a receiving link, filtering other stray signals at a radio frequency stage and preventing interference to the frequency mixer. In the embodiment of the invention, 3 communication frequency channel channels can be set for the radio frequency switch 6 to select, the frequency bands corresponding to the 3 communication frequency channel channels can be respectively 2.4-2.5 GHz, 3.3-3.6 GHz and 4.8-6 GHz, and the frequency bands comprise the main frequency bands of the current most popular WLAN and 5G communication. Each communication band channel corresponds to a radio frequency filter (such as a band pass filter), and as an example, the radio frequency filters corresponding to 3 communication band channels are: BPF1 (such as dea142450bt filter) corresponding to 2.4-2.5 GHz band; the BPF2 (such as a BFCN-3600+ filter) corresponds to a 3.3-3.6 GHz wave band; BPF3 (such as dea105425bt filter) corresponding to 4.8-6.0 GHz band. In an embodiment of the present invention, the rf switch is, for example, an HMC7992 switch. The radio frequency signal output from the low noise amplifier enters the input end of the radio frequency switch, a user can select a required communication frequency band channel according to needs, namely, the radio frequency signal is input to a radio frequency filter of the selected channel for radio frequency filtering, and the traditional superheterodyne structure causes image interference due to the fact that the bandwidth range of the radio frequency filter is large. In the invention, the bandwidth range of the filter of each frequency band is smaller, and a plurality of radio frequency filters are adopted, so that the image interference can be greatly reduced. The insertion loss of the radio frequency switch is about 2dB, and the insertion loss of the radio frequency filter is about 1 dB.
The radio frequency signal after radio frequency filtering and the first local oscillator signal 9 are input to the first stage frequency converter 8 together for down conversion, and an intermediate frequency signal is obtained. In some embodiments of the present invention, the first local oscillator signal 9 may be generated by the local oscillator module 2, but may also be generated by other devices (e.g., a signal generator). In the preferred embodiment of the present invention, different local oscillation signals may be provided to the first stage frequency converter 8 based on the selection of the communication frequency band channel. The first local oscillator signal is input to a local oscillator input port of the mixer via a local oscillator output (LO) port, and is input to the first stage frequency converter 8 together with the intermediate frequency signal. As an example, the first stage frequency converter 8 may adopt a mixer ADL5801, but the present invention is not limited thereto. The mixer ADL5801 integrates a high linearity double balanced active mixer core and a local oscillator buffer amplifier, the balanced active mixer can provide excellent local oscillator to radio frequency and local oscillator to intermediate frequency leakage, and the leakage value is better than-40 dBm. The input radio frequency signals after radio frequency filtering are 2.4-2.5 GHz, 3.3-3.6 GHz and 4.8-6 GHz band signals, the output corresponding to the first local oscillation signal is respectively 1.4-1.5 GHz, 2.3-2.6 GHz and 3.8-5.0 GHz signals, and after the two signals are mixed, a fixed intermediate frequency signal of 1GHz is generated.
The intermediate frequency signal is further filtered and amplified by an intermediate frequency filter 10 and a power amplifier 11, respectively. As an example, the intermediate frequency filter 10 is, for example, an intermediate frequency filter BPF-V1000+ band pass filter, and the power amplifier 11 is, for example, a PMA-545G3+ intermediate frequency amplifier. That is, the mixed 1GHz intermediate frequency signal is subjected to high-selectivity band-pass filter BPF-V1000+ to filter local oscillator leakage signals, adjacent interference and the like, the pass band range of the band-pass filter is 940-1060 MHz, the bandwidth of an intermediate frequency channel is 120MHz, and the insertion loss is about 4 dB. The output end of the intermediate frequency filter is connected with the input end of an intermediate frequency amplifier PMA-545G3+, the filtered 1GHz intermediate frequency signal enters the intermediate frequency amplifier, and the gain of the selected intermediate frequency amplifier is about 30 dB.
The filtered and amplified intermediate frequency signal and the second local oscillation signal 13 are input to the demodulator 12 to be demodulated, and a baseband I signal and a baseband Q signal are obtained. The second local oscillator signal is input to a local oscillator input port of the demodulator via a local oscillator output (LO) port, and is input to the demodulator together with the intermediate frequency signal. In an embodiment of the present invention, the demodulator is, for example, an ADL5380 mixer. The filtered and amplified intermediate frequency signal enters a demodulator ADL5380 to be down-converted to a baseband. The demodulator selected by the invention has excellent demodulation precision, the amplitude balance and the phase balance are respectively about 0.07dB and 0.2 degrees, and the leakage between an LO port and an IF port is less than-50 dBm. The input intermediate frequency signal is 1GHz, the second local oscillation signal is 1GHz signal, and the two signals are mixed to generate a baseband I/Q signal. As shown in fig. 4, the demodulator may include two mixers (I-mixer and Q-mixer) and one phase shifter inside. Two mixers inside the demodulator convert the intermediate frequency signal into a baseband in-phase signal and a baseband quadrature signal, i.e., an I signal and a Q signal (two paths of quadrature baseband signals), respectively.
The baseband I signal and the baseband Q signal are each subjected to low-pass filtering control and gain control through a baseband programmable filter 14 and a variable gain amplifier 15, thereby obtaining a signal of a predetermined bandwidth.
The demodulated I/Q signal is low pass filtered and gained by selecting an ADRF6518 for low pass filtering and gain in one embodiment of the invention, the ADRF6518 having a pair of matched fully differential low noise, low distortion programmable filters and variable gain amplifiers. Each channel in the ADRF6518 is capable of rejecting large out-of-band interference signals, amplifying the desired signal, and then an analog-to-digital converter converts the signal to a digital signal for processing in the digital baseband section. The tunable filter has a transition frequency of 0 to 63MHz and is stepped to 1MHz, and if the required bandwidth is large, the tunable filter can be set to a bypass mode, and the bandwidth can be extended to 1100 MHz. The amplifier can select fixed gains of 9dB, 12dB and 15dB through software control, and can also control adjustable 24dB gain through 0-1V voltage.
In the embodiment of the invention, the radio frequency filter, the intermediate frequency filter and the baseband adjustable filter carry out accurate filtering in each frequency band, the radio frequency filter filters other stray radio frequency signals received by the antenna, the intermediate frequency filter filters other signals except the intermediate frequency, and the adjustable baseband low-pass filter can control the selection of the bandwidth of the adaptive signal through software.
The frequency band reconfigurable radio frequency receiver with the structure can reduce image interference and other adjacent interference, is suitable for WIFI communication and 5G communication, and can meet the multi-standard communication requirement.
Fig. 3 shows a schematic block diagram of a band reconfigurable radio frequency receiver front-end for multi-standard communication according to another embodiment of the present invention. As shown in fig. 3, the front end of the receiver of the present invention further includes a local oscillation module 2, a control module 3, and a power module 4, in addition to the receiving module 1.
The control module 3 is electrically connected with the radio frequency switch 5, the local oscillation module 2, the baseband programmable filter 14 and the variable gain amplifier 15, and is used for performing logic control and writing on the radio frequency switch, the local oscillation module, the variable gain amplifier and the baseband programmable filter through the SPI bus.
The local oscillation module 2 is configured to generate a first local oscillation signal and a second local oscillation signal based on control of the control module. The local oscillation module is used for respectively sending local oscillation signals to the local oscillation input end of the first frequency mixer and the local oscillation input end of the demodulator, namely the local oscillation module is electrically connected with the frequency mixer and the demodulator. The control module performs logic control and writing in on each module through an SPI bus, and is electrically connected with the radio frequency switch, the local oscillator module, the variable gain amplifier and the baseband programmable filter.
The power module 4 is used for supplying power to the receiving module 1, the local oscillation module 2 and the control module 3. For example, the power supply module supplies power to the low noise amplifier 5, the radio frequency switch 6, the first stage frequency converter 8, the intermediate frequency power amplifier 11, the demodulator 12, the local oscillation module 2, the baseband programmable filter 14, and the variable gain amplifier 15, all of which require 5V power supplies and provide a 5V power supply signal after voltage stabilization.
In the embodiment of the present invention, the local oscillation module 2 is configured to send local oscillation signals to the first stage frequency converter and the demodulator respectively, that is, the local oscillation module is electrically connected to the first stage frequency converter and the demodulator, the local oscillation module 2 generates two local oscillation signals, a first local oscillation signal is sent to a local oscillation input port of the first stage frequency converter, and a second local oscillation signal is sent to a local oscillation input port of the demodulator. The control module 3 can perform logic control and write-in on each module through the SPI bus, that is, the control module 3 is electrically connected to the radio frequency switch 6, the local oscillation module 2, the variable gain amplifier, and the baseband programmable filter, and performs logic control and write-in on the radio frequency switch 6, the local oscillation module 2, the variable gain amplifier, and the baseband programmable filter. The power supply module provides required power supply for the receiving module 1, the control module 3 and the local oscillation module 2.
In the embodiment of the present invention, the local oscillation module may adopt a local oscillation chip HMC833 which can generate a signal of 25 to 6000MHz, and a first-stage frequency converter (or first-stage mixer) needs to input a signal of 1.4 to 1.5GHz, 2.3 to 2.6GHz, or 3.8 to 5.0 GHz. The demodulator (or called second-stage mixer) needs to input 1GHz signals, and the local oscillation chip can generate the required local oscillation signals through Serial Port Interface (SPI) programming, so that software adjustment is realized, and the flexibility of the whole receiver system is improved.
The control module of the embodiment of the invention adopts an STC89C51 singlechip, is connected with three modules of a radio frequency switch, a local oscillation module, a variable gain amplifier and a baseband programmable filter, is connected with a register write-in port through the singlechip, and then downloads a control program into the singlechip by using a PC (personal computer) so as to realize the control of each module. Under the condition, the radio frequency switch, the adjustable local oscillator, the amplifier with the variable gain and the adjustable low-pass filter realize quick adjustment through software, and the reconfigurability of system hardware and the flexibility of communication are improved.
In the embodiment of the invention, the variable gain amplifier and the baseband programmable filter can control the gain and the low-pass turning frequency by the control module, and the bandwidth of a received signal can be changed by changing the cut-off frequency through software, so that the adjustable bandwidth is realized. The variable gain amplifier and the baseband programmable filter are powered by a power supply module.
In order to make the system simpler, the mixer, the demodulator, the variable gain amplifier and the baseband programmable filter can be input in a single-ended mode in the embodiment of the invention.
Through practical tests, the receiving module can provide 26.9-128.9 dB of gain. The transmission frequency ranges of 2.4-2.5 GHz, 3.3-3.6 GHz and 4.8-6.0 GHz, and the WLAN and 5G can pass through some common frequency bands, so that the interference suppression is high, and it is worth mentioning that the Error Vector Magnitude (EVM) is less than 1.45% when the received signal is a 16QAM signal of 100MHz, and the EVM of the receiver is less than 1.28% when the received signal is a 64QAM signal.
In the embodiment of the invention, the radio frequency filter, the intermediate frequency filter and the baseband adjustable filter carry out accurate filtering in each frequency band, the radio frequency filter filters other stray radio frequency signals received by the antenna, the intermediate frequency filter filters other signals except the intermediate frequency, and the adjustable baseband filter can control the selection of the adaptive signal bandwidth through software.
In the embodiment of the invention, the radio frequency switch is a controllable multi-channel switch, the input end of the radio frequency switch is connected with the low noise amplifier, and the output end of the radio frequency switch is connected with the radio frequency filters; the control module selects a communication frequency band channel by controlling the logic high and low levels of the radio frequency switch, so as to realize the control of the required channel.
In alternative embodiments of the present invention, 2 or more than 3 communication frequency channels may be provided for selection by the rf switch 6. In the case where 2 communication band channels are provided, the frequency bands corresponding to the 2 communication band channels may be two frequency bands of the 3 frequency bands described above. In the case where more than 3 communication band channels are provided, a corresponding number of bands may be set for the communication band channels. Each radio frequency filter corresponding to each communication frequency channel is used for obtaining the radio frequency signal of the frequency band corresponding to each communication frequency channel.
In summary, through software control, the present invention realizes selection of multiple (e.g. 3) channels and selection of baseband receiving bandwidths in different communication modes, and the present invention uses a self-designed local oscillator as an input of a local oscillator module and can determine an output signal of the local oscillator according to a radio frequency input signal, so that an intermediate frequency after frequency mixing is a fixed intermediate frequency. The whole system has strong anti-interference capability, reconfigurability and low complexity and cost.
The frequency band reconfigurable radio frequency receiver front end oriented to multi-standard communication is suitable for WIFI communication and 5G communication, supports the current most popular communication frequency band, can adjust the bandwidth at any time, improves the communication speed, and can adjust local oscillator output in real time according to radio frequency signals. The invention carries out multiple filtering at radio frequency, intermediate frequency and baseband, greatly improves the anti-interference capability, has reconfigurability and reduces the complex cost of the system.
According to the frequency band reconfigurable radio frequency receiver, the bandwidth can be flexibly adjusted according to software; the local vibration source output can be changed in real time according to the selection of the radio frequency signal frequency band, and the flexibility of the system is realized by fully utilizing software.
The invention constructs a universal hardware platform with openness, standardization and modularization, so that various functions such as working frequency band, communication type, working bandwidth and the like can be completed by software, thereby developing a new generation wireless communication system with high flexibility and openness. The invention carries out multiple filtering at radio frequency, intermediate frequency and baseband, adopts segmented filtering at the front end of the radio frequency, has narrow bandwidth selection, solves image interference and other adjacent interference, and greatly improves the anti-interference capability. It should be noted that the exemplary embodiments of the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Those of ordinary skill in the art will appreciate that the various illustrative components, systems, and methods described in connection with the embodiments disclosed herein may be implemented as hardware, software, or combinations of both. Whether this is done in hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.
The above description is only an example of the present specification, and is not intended to limit the present specification. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. A frequency band reconfigurable radio frequency receiver front end facing multi-standard communication is characterized by comprising a receiving module;
the receiving module includes: the system comprises a low noise amplifier, a radio frequency switch, a plurality of radio frequency filters corresponding to a plurality of communication frequency band channels, a first-stage frequency converter, an intermediate frequency filter, a power amplifier, a demodulator, a variable gain amplifier and a baseband programmable filter;
the low-noise amplifier receives the radio-frequency signal from the antenna of the receiver and performs low-noise amplification on the received radio-frequency signal;
the radio frequency switch is used for selecting a communication frequency channel and inputting the radio frequency signal amplified by low noise to a radio frequency filter corresponding to the selected communication frequency channel for radio frequency filtering;
inputting the radio-frequency signal subjected to radio-frequency filtering and a first local oscillator signal into the first-stage frequency converter for down-conversion to obtain an intermediate-frequency signal;
the intermediate frequency signal is filtered and amplified by the intermediate frequency filter and the power amplifier respectively;
inputting the filtered and amplified intermediate frequency signal and a second local oscillation signal into the demodulator for demodulation to obtain a baseband I/Q signal;
and the baseband I/Q signal passes through the variable gain amplifier and the baseband programmable filter to carry out gain control and low-pass filtering control, so that a signal with a preset bandwidth is obtained.
2. The rf receiver front-end of claim 1, further comprising a control module and a local oscillation module;
the control module is electrically connected with the radio frequency switch, the local oscillator module, the variable gain amplifier and the baseband programmable filter and is used for logically controlling the radio frequency switch, the local oscillator module, the variable gain amplifier and the baseband programmable filter through an SPI bus;
the local oscillation module is used for generating the first local oscillation signal and the second local oscillation signal based on the control of the control module.
3. The rf receiver front-end of claim 1, further comprising: and the power supply module is used for supplying power to the receiving module, the control module and the local oscillation module.
4. The front end of a radio frequency receiver according to claim 1, wherein the frequency bands corresponding to the plurality of communication frequency band channels include two or more of 2.4 to 2.5GHz, 3.3 to 3.6GHz, and 4.8 to 6 GHz;
the plurality of radio frequency filters corresponding to the plurality of communication frequency band channels are used for obtaining radio frequency signals of frequency bands corresponding to the plurality of communication frequency band channels.
5. The front-end of a radio frequency receiver of claim 2, wherein the radio frequency switch is a controllable multi-channel switch having an input coupled to the low noise amplifier and an output coupled to the plurality of radio frequency filters; the control module selects a communication frequency band channel by controlling the logic high and low levels of the radio frequency switch, so as to realize the control of the required channel.
6. The front-end of a radio frequency receiver according to claim 1, wherein the first local oscillator signal is a 1.4-1.5 GHz signal, a 2.3-2.6 GHz signal, or a 3.8-5.0 GHz signal, and the second local oscillator signal is a 1GHz signal.
7. The front-end of claim 6, wherein the first stage frequency converter comprises a double balanced active mixer and a local oscillator buffer amplifier, and the output intermediate frequency signal is a 1GHz intermediate frequency signal.
8. The radio frequency receiver front-end of claim 1, wherein the demodulator has an amplitude balance and a phase balance of 0.07dB and 0.2 °, respectively, and a leakage from a linear output port of a power amplifier to an intermediate frequency port is less than-50 dBm;
the variable gain amplifier and the baseband programmable filter are subjected to gain control and low-pass turning frequency control by the control module;
the variable gain amplifier is used to provide some or all of the following fixed gains: fixed gains of 9dB, 12dB, 15dB and 24 dB.
9. The receiver front-end of claim 1, characterized in that the demodulator comprises two mixers for converting the intermediate frequency signal into a baseband in-phase signal and a baseband quadrature signal and a phase shifter for phase shifting the second local oscillator signal by 90 °.
10. The receiver front-end of claim 1, wherein the rf filter is configured to filter out spurious rf signals received by the antenna; the intermediate frequency filter is used for filtering signals except the intermediate frequency signals; the baseband programmable filter is used for controlling the selection of the bandwidth of the adaptive signal through software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210089378.8A CN114584164A (en) | 2022-01-25 | 2022-01-25 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210089378.8A CN114584164A (en) | 2022-01-25 | 2022-01-25 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114584164A true CN114584164A (en) | 2022-06-03 |
Family
ID=81772368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210089378.8A Pending CN114584164A (en) | 2022-01-25 | 2022-01-25 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114584164A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412113A (en) * | 2022-07-12 | 2022-11-29 | 北京中科睿谱科技有限公司 | Universal receiver with adjustable frequency band and bandwidth and signal receiving method |
| CN115412110A (en) * | 2022-07-12 | 2022-11-29 | 北京中科睿谱科技有限公司 | Fusion receiver based on compressed sensing |
| CN116388776A (en) * | 2023-06-05 | 2023-07-04 | 中国人民解放军63921部队 | Reconfigurable multi-band radio frequency front-end device |
| CN116505969A (en) * | 2023-02-03 | 2023-07-28 | 珠海笛思科技有限公司 | High-speed frequency hopping zero intermediate frequency receiver and control method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584304B1 (en) * | 1998-11-30 | 2003-06-24 | Robert Bosch Gmbh | Switchable wide band receiver front end for a multiband receiver |
| US20060133551A1 (en) * | 2004-12-21 | 2006-06-22 | Davidoff Loan T | Configurable filter and receiver incorporating same |
| EP1714379A1 (en) * | 2004-02-10 | 2006-10-25 | Bitwave Semiconductor | Programmable radio transceiver |
| CN1984414A (en) * | 2005-11-16 | 2007-06-20 | 美国博通公司 | Multimode communication device and method of receiving multiple radio frequency signal therein |
| CN102256384A (en) * | 2011-06-28 | 2011-11-23 | 东南大学 | System configurable radio frequency remote device |
| CN102523596A (en) * | 2011-12-13 | 2012-06-27 | 北京北方烽火科技有限公司 | High speed frequency sweep apparatus and realization method thereof |
| US20120295564A1 (en) * | 2011-05-20 | 2012-11-22 | Sunplus Technology Co., Ltd. | General receiver device with adaptive filter |
| US20130052973A1 (en) * | 2011-08-24 | 2013-02-28 | Aviacomm Inc. | Low-power and noise-cancelling wideband receiver front-end |
| CN107888215A (en) * | 2017-12-25 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of broadband receiver RF front-end circuit |
| CN109347507A (en) * | 2018-10-29 | 2019-02-15 | 中国航空无线电电子研究所 | Broadband can configure C-band radio-frequency front-end |
| CN110149121A (en) * | 2019-04-17 | 2019-08-20 | 北京邮电大学 | A kind of adjustable ultra wide band zero intermediate frequency transceiver rf analog front-end |
| US10498371B1 (en) * | 2017-05-25 | 2019-12-03 | Nimesh D Parikh | Multi-channel, multi-band configurable RF front-end arrangement for wireless communication |
| US20200077412A1 (en) * | 2018-09-03 | 2020-03-05 | Celeno Communications (Israel) Ltd. | Dynamically configurable wireless device supporting multiple concurrent frequency bands |
| CN113630354A (en) * | 2021-08-31 | 2021-11-09 | 中国船舶重工集团公司第七二三研究所 | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method |
| CN113872633A (en) * | 2021-11-18 | 2021-12-31 | 中国航空无线电电子研究所 | UV wave band broadband reconfigurable transceiver |
-
2022
- 2022-01-25 CN CN202210089378.8A patent/CN114584164A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584304B1 (en) * | 1998-11-30 | 2003-06-24 | Robert Bosch Gmbh | Switchable wide band receiver front end for a multiband receiver |
| EP1714379A1 (en) * | 2004-02-10 | 2006-10-25 | Bitwave Semiconductor | Programmable radio transceiver |
| US20060133551A1 (en) * | 2004-12-21 | 2006-06-22 | Davidoff Loan T | Configurable filter and receiver incorporating same |
| CN1984414A (en) * | 2005-11-16 | 2007-06-20 | 美国博通公司 | Multimode communication device and method of receiving multiple radio frequency signal therein |
| US20120295564A1 (en) * | 2011-05-20 | 2012-11-22 | Sunplus Technology Co., Ltd. | General receiver device with adaptive filter |
| CN102256384A (en) * | 2011-06-28 | 2011-11-23 | 东南大学 | System configurable radio frequency remote device |
| US20130052973A1 (en) * | 2011-08-24 | 2013-02-28 | Aviacomm Inc. | Low-power and noise-cancelling wideband receiver front-end |
| CN102523596A (en) * | 2011-12-13 | 2012-06-27 | 北京北方烽火科技有限公司 | High speed frequency sweep apparatus and realization method thereof |
| US10498371B1 (en) * | 2017-05-25 | 2019-12-03 | Nimesh D Parikh | Multi-channel, multi-band configurable RF front-end arrangement for wireless communication |
| CN107888215A (en) * | 2017-12-25 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of broadband receiver RF front-end circuit |
| US20200077412A1 (en) * | 2018-09-03 | 2020-03-05 | Celeno Communications (Israel) Ltd. | Dynamically configurable wireless device supporting multiple concurrent frequency bands |
| CN109347507A (en) * | 2018-10-29 | 2019-02-15 | 中国航空无线电电子研究所 | Broadband can configure C-band radio-frequency front-end |
| CN110149121A (en) * | 2019-04-17 | 2019-08-20 | 北京邮电大学 | A kind of adjustable ultra wide band zero intermediate frequency transceiver rf analog front-end |
| CN113630354A (en) * | 2021-08-31 | 2021-11-09 | 中国船舶重工集团公司第七二三研究所 | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method |
| CN113872633A (en) * | 2021-11-18 | 2021-12-31 | 中国航空无线电电子研究所 | UV wave band broadband reconfigurable transceiver |
Non-Patent Citations (2)
| Title |
|---|
| 卢莹莹等: "低复杂度可变带宽全数字调制器", 《清华大学学报(自然科学版)》, no. 08, 15 August 2009 (2009-08-15) * |
| 郑宏兴: "微波与天线工程基础", 武汉：华中科学技术大学出版社, pages: 150 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412113A (en) * | 2022-07-12 | 2022-11-29 | 北京中科睿谱科技有限公司 | Universal receiver with adjustable frequency band and bandwidth and signal receiving method |
| CN115412110A (en) * | 2022-07-12 | 2022-11-29 | 北京中科睿谱科技有限公司 | Fusion receiver based on compressed sensing |
| CN116505969A (en) * | 2023-02-03 | 2023-07-28 | 珠海笛思科技有限公司 | High-speed frequency hopping zero intermediate frequency receiver and control method thereof |
| CN116505969B (en) * | 2023-02-03 | 2024-03-26 | 四川笛思科技有限公司 | High-speed frequency hopping zero intermediate frequency receiver and control method thereof |
| CN116388776A (en) * | 2023-06-05 | 2023-07-04 | 中国人民解放军63921部队 | Reconfigurable multi-band radio frequency front-end device |
| CN116388776B (en) * | 2023-06-05 | 2023-08-22 | 中国人民解放军63921部队 | Reconfigurable multi-band radio frequency front-end device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4494650B2 (en) | System and process for shared functional block CDMA / GSM communication transceiver | |
| CN114584164A (en) | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication | |
| JP3690889B2 (en) | Receiver circuit | |
| CN1049310C (en) | Radio receiver | |
| US7792228B2 (en) | Apparatus and method for digital down-conversion in a multi-mode wireless terminal | |
| US8331895B2 (en) | Receiving circuit | |
| US20050147192A1 (en) | High frequency signal receiver and semiconductor integrated circuit | |
| CN102832959A (en) | Radio-frequency front end in high and medium frequency superheterodyne+zero intermediate frequency structure | |
| JP2006186956A (en) | Multi-mode transmitter circuit, multi-mode transceiving circuit and wireless communication apparatus using the same | |
| CN108055049B (en) | Wireless data transmission radio receiving circuit | |
| JP2006186956A5 (en) | ||
| WO2000051253A1 (en) | Radio terminal unit | |
| EP1811678A2 (en) | Radio frequency signal transmission/reception apparatus and radio frequency signal transmission/reception method | |
| SE519614C2 (en) | Multi-standard transceiver with three-band architecture for WLAN | |
| JP3934162B2 (en) | Equipment in a communication system | |
| JP3816356B2 (en) | Wireless transmitter | |
| US7515648B2 (en) | Transmitter and wireless communication apparatus using same | |
| KR101053136B1 (en) | Shared function block multimode multiband communication transceiver | |
| US20050201494A1 (en) | Apparatus and method for digital down-conversion in a multi-mode wireless terminal | |
| US6807237B1 (en) | Radio apparatus and transmission/reception method | |
| CN111130747B (en) | Wideband receiver compatible with voice channel | |
| CN114584165B (en) | High-image-rejection adjustable ultra-wideband superheterodyne receiving radio frequency front end | |
| JP3746209B2 (en) | Wireless transceiver | |
| RU2398352C2 (en) | Device for transmission/reception of radio frequency signal and method for transmission/reception of radio frequency signal | |
| JP2002176372A (en) | Radio communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220603 |
|
| RJ01 | Rejection of invention patent application after publication |