CN103986488A - Broadband radio frequency receiver of high-performance LTE channel simulator - Google Patents
Broadband radio frequency receiver of high-performance LTE channel simulator Download PDFInfo
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Abstract
The invention discloses a broadband radio frequency receiver of a high-performance LTE channel simulator. The broadband radio frequency receiver of the high-performance LTE channel simulator comprises a broadband radio-frequency power detection amplitude adjustment module, a segmentation frequency conversion filtering module, an automatic intermediate frequency level control module, an intermediate frequency demodulating module and a local oscillator module. The broadband radio frequency receiver has the advantages of being wide in frequency band, low in power dissipation, small in size, high in demodulating accuracy and suitable for the LTE channel simulator.
Description
Technical field
The present invention relates to a kind of high-performance LTE channel simulator wideband radio receiver, belong to microwave/millimeter wave device technology.
Background technology
The great special project of " new generation broadband wireless mobile communication net " national science and technology is that the Chinese government is in order to promote the overall development of Communication in China industry, promote China's wireless mobile communications industry in global status, cultivate China's mobile communications industry capability of sustainable development, pull the important measures of China's national industry innovation and development.TD-LTE and evolution technology TD-LTE-Advanced thereof, as the follow-up evolution technology of the TD-SCDMA with the independent intellectual property of China, will embody right of speech and the competitiveness of China in international communication field more.
Wireless channel is very complicated and changeable signal physical channel, wireless channel exists the unfavorable factor that multipath fading, flat decline, noise etc. affect communication performance, and these problems that to be all communication systems must emphasis consider, the simulation of channel is to guarantee under same communication protocol and system system, the requisite testing process of smooth and easy communication between the system equipment that the terminal Yu Duo producer of different manufacturers exploitation provides.By development support LTE wireless channel simulation device; save the development cost of mobile communication equipment; flexibility while having increased research and development; shorten the lead time simultaneously; reduce the overall development process of base station and terminal equipment and interconnect the testing time; reduce the time of field testing, to improving and guaranteeing that the interconnection and interflow of different system, manufacturer terminal has very positive effect.
In LTE channel simulator, wideband radio receiver is key component in whole equipment, this radio-frequency transmitter can receive the broadband wireless radiofrequency signal of 400MHz～6GHz, receiver received power scope is+15～-50dBm, the processing bandwidth of receiver can reach 100MHz, by adjusting the phase place of local oscillator in frequency mixer, receiver channel phases is adjusted, also needed to possess the feature of low complex degree, low-power consumption simultaneously.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of high-performance LTE channel simulator wideband radio receiver, can effectively reduce LTE channel simulator complexity, reduce power consumption and volume, realize better phase noise performance index.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
Wideband radio receiver is the core component of RF and microwave system, in communication, radar and electronic countermeasures, has key effect, and its key technical indexes is for receiving bandwidth, noise factor, incoming level dynamic range, processing bandwidth etc.The high-performance LTE channel simulator wideband radio receiver of the present invention design, has radio frequency input broadband, processes features such as being with wide, volume is little, low in energy consumption, high-performance, high integration, good performance indexes.Specifically comprise broadband radio-frequency power detected amplitude adjusting module, segmentation variable-frequency filtering module, intermediate frequency automatic electric-level control module, intermediate frequency demodulation module and local oscillator module;
Described broadband radio-frequency power detected amplitude adjusting module: the power to input signal detects: if input signal power is greater than threshold value, input signal is carried out to attenuation processing, then the signal after attenuation processing is sent to segmentation variable-frequency filtering module; If input signal is less than or equal to threshold value, input signal directly by and send to segmentation variable-frequency filtering module;
Described segmentation variable-frequency filtering module: input signal is carried out to frequency-division section processing, for different frequency ranges, carry out respectively, after variable-frequency filtering processing separately, all becoming intermediate-freuqncy signal, then the intermediate-freuqncy signal obtaining is sent to intermediate frequency automatic electric-level control module;
Described intermediate frequency automatic electric-level control module: the level that input signal power is greater than to threshold range is decayed, sends to intermediate frequency demodulation module after adjusting in threshold range; Level to input signal power in threshold range, directly sends to intermediate frequency demodulation module; The level that input signal power is less than to threshold range amplifies, and sends to intermediate frequency demodulation module after adjusting in threshold range;
Described intermediate frequency demodulation module: input signal is carried out to quadrature demodulation, produce analog baseband signal, carry out data processing to the baseband portion of LTE channel simulator; In intermediate frequency demodulation module, insert an IF-FRE synthesizer that phase place is adjustable, make the local oscillation signal phase place of input adjustable, realize the adjustable function of radio frequency reception phase place;
Described local oscillator module: radio-frequency (RF) local oscillator signal is provided to LTE channel simulator.
In radio circuit, in order to realize the accurate control to phase place, conventionally can in transceiver, insert phase shifter to realize phase place adjustment.Adopt different phase shifter schemes, Phasing is also different.Analog phase shifter bandwidth of operation is narrow; Digital control phase shifter operational frequency bandwidth can wide a little point, but phase shifting accuracy is not high enough, and general typical phase shifting accuracy is 6.25 degree.The scheme that the present invention adopts is in demodulation link, to insert a frequency synthesizer that intermediate frequency phase place is adjustable, the phase place of this frequency synthesizer is adjusted precision can reach 2 degree, precision is high, and implementation method is simple, need in receiver and sender, all not insert complicated phase-shift circuit, further reduce the complexity of LTE channel simulator medium frequency synthesizer.
Concrete, described broadband radio-frequency power detected amplitude adjusting module comprises braodband directional coupler, limiting amplifier, wide band radio-frequency numerical-control attenuator and the amplifier connecting successively, input signal is inputted via braodband directional coupler, and wideband radio frequency amplifier and wide band radio-frequency wave detector carry out power detection to the output signal of braodband directional coupler.
Concrete, described segmentation variable-frequency filtering module, the input signal of 400MHz～6GHz is carried out to frequency-division section processing, for different frequency ranges, carry out respectively after variable-frequency filtering processing separately, all become the intermediate-freuqncy signal of 1.2GHz, then the intermediate-freuqncy signal of the 1.2GHz obtaining is sent to intermediate frequency automatic electric-level control module.
Concrete, described segmentation variable-frequency filtering module:
First 400～2GHz input signal enters after low pass filter and A radio-frequency (RF) mixer successively by radio frequency hilted broadsword four throw switches, and the frequency of signal is become to 3.2GHz; And then enter successively after A radio frequency amplifier, A radio frequency band filter, B radio frequency amplifier and B radio-frequency (RF) mixer, the frequency of signal is become to 1.2GHz; Finally by A intermediate frequency amplifier and intermediate frequency single-pole double throw quick closing valve, arrive intermediate frequency automatic electric-level control module;
2～6GHz input signal is first by radio frequency hilted broadsword four throw switches, one tunnel is switched to B radio frequency band filter the radiofrequency signal of 2～4GHz is carried out to filtering processing, another road is switched to C radio frequency band filter the radiofrequency signal of 4～6GHz is carried out to filtering, two paths of signals synthesizes respectively the radiofrequency signal of a 2～6GHz who has processed after filtering by radio frequency single-pole double-throw switch (SPDT), the radiofrequency signal of the 2～6GHz obtaining is successively through being mixed to the radiofrequency signal of 1.2GHz under C wideband radio frequency amplifier and C radio-frequency (RF) mixer, the radiofrequency signal of the 1.2GHz obtaining arrives intermediate frequency automatic electric-level control module by B intermediate frequency amplifier and intermediate frequency single-pole double-throw switch (SPDT),
The remaining road matching connection load of radio frequency hilted broadsword four throw switches.
Concrete, described intermediate frequency automatic electric-level control module comprises intermediate-frequency filter, C intermediate frequency amplifier, A intermediate frequency numerical-control attenuator, D intermediate frequency amplifier, B intermediate frequency numerical-control attenuator and the E intermediate frequency amplifier connecting successively.
Concrete, described local oscillator module comprises A IF-FRE synthesizer, rf frequency synthesizer and B IF-FRE synthesizer, described rf frequency synthesizer provides local oscillation signal for A radio-frequency (RF) mixer and C radio-frequency (RF) mixer, described A IF-FRE synthesizer provides local oscillation signal for B radio-frequency (RF) mixer, and described B IF-FRE synthesizer provides local oscillation signal for intermediate frequency demodulation module.
Concrete, also comprise single chip control module and power module, described one-chip computer module is controlled the chip of wide band radio-frequency numerical-control attenuator, radio frequency hilted broadsword four throw switches, B radio frequency band filter, C radio frequency band filter, matching module, radio frequency single-pole double-throw switch (SPDT), intermediate frequency single-pole double-throw switch (SPDT), A intermediate frequency numerical-control attenuator, B intermediate frequency numerical-control attenuator, A IF-FRE synthesizer, rf frequency synthesizer and B IF-FRE synthesizer.
Beneficial effect: high-performance LTE channel simulator wideband radio receiver provided by the invention, there is bandwidth, power consumption is little, volume is little, demodulation accuracy is high feature, be applicable to being used in LTE channel simulator and corresponding wideband radio receiver.
Accompanying drawing explanation
Fig. 1 is the block diagram that is applied to the wideband radio receiver in LTE channel simulator provided by the invention;
Fig. 2 is the specific implementation block diagram that is applied to the wideband radio receiver in LTE channel simulator.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be a kind of high-performance LTE channel simulator wideband radio receiver as shown in Figure 1 and Figure 2, it is characterized in that: comprise broadband radio-frequency power detected amplitude adjusting module, segmentation variable-frequency filtering module, intermediate frequency automatic electric-level control module, intermediate frequency demodulation module, local oscillator module, single chip control module and power module; With regard to modules, illustrated below.
Described broadband radio-frequency power detected amplitude adjusting module: the power to input signal detects, surpasses the treatable incoming level scope of receiver, by single chip control module, says that signal disconnects, and protection receiver is not compromised.Power to input signal detects: if input signal power is greater than threshold value, input signal is carried out to attenuation processing, then the signal after attenuation processing is sent to segmentation variable-frequency filtering module; If input signal is less than or equal to threshold value, input signal directly by and send to segmentation variable-frequency filtering module.
As shown in Figure 2, described broadband radio-frequency power detected amplitude adjusting module comprises braodband directional coupler 1, limiting amplifier 2, wide band radio-frequency numerical-control attenuator 3 and the amplifier 4 connecting successively, input signal is via braodband directional coupler 1 input, and the output signal of wideband radio frequency amplifier 31 and 32 pairs of braodband directional couplers 1 of wide band radio-frequency wave detector is carried out power detection.
Described segmentation variable-frequency filtering module: the input signal of 400MHz～6GHz is carried out to frequency-division section processing, for different frequency ranges, carry out respectively after variable-frequency filtering processing separately, all become the intermediate-freuqncy signal of 1.2GHz, then the intermediate-freuqncy signal of the 1.2GHz obtaining is sent to intermediate frequency automatic electric-level control module.
As shown in Figure 2, first 400～2GHz input signal enters after low pass filter 6 and A radio-frequency (RF) mixer 11 successively by radio frequency hilted broadsword four throw switches 5, and the frequency of signal is become to 3.2GHz; And then enter successively after A radio frequency amplifier 12, A radio frequency band filter 13, B radio frequency amplifier 14 and B radio-frequency (RF) mixer 15, the frequency of signal is become to 1.2GHz; Finally by A intermediate frequency amplifier 16 and intermediate frequency single-pole double throw quick closing valve 20, arrive intermediate frequency automatic electric-level control module.2～6GHz input signal is first by radio frequency hilted broadsword four throw switches 5, one tunnel is switched to the radiofrequency signal of 7 couples of 2～4GHz of B radio frequency band filter and carries out filtering processing, another road is switched to the radiofrequency signal of 8 couples of 4～6GHz of C radio frequency band filter and carries out filtering, two paths of signals synthesizes respectively the radiofrequency signal of a 2～6GHz who has processed after filtering by radio frequency single-pole double-throw switch (SPDT) 10, the radiofrequency signal of the 2～6GHz obtaining is passed through the radiofrequency signal that C wideband radio frequency amplifier 17 and C radio-frequency (RF) mixer are mixed to 1.2GHz for 18 times successively, the radiofrequency signal of the 1.2GHz obtaining arrives intermediate frequency automatic electric-level control module by B intermediate frequency amplifier 19 and intermediate frequency single-pole double-throw switch (SPDT) 20.The remaining road matching connection load 9 of radio frequency hilted broadsword four throw switches 5.
Described intermediate frequency automatic electric-level control module: the level that input signal power is greater than to threshold range is decayed, sends to intermediate frequency demodulation module after adjusting in threshold range; Level to input signal power in threshold range, directly sends to intermediate frequency demodulation module; The level that input signal power is less than to threshold range amplifies, and sends to intermediate frequency demodulation module after adjusting in threshold range.
As shown in Figure 2, described intermediate frequency automatic electric-level control module comprises intermediate-frequency filter 24, C intermediate frequency amplifier 25, A intermediate frequency numerical-control attenuator 26, D intermediate frequency amplifier 27, B intermediate frequency numerical-control attenuator 28 and the E intermediate frequency amplifier 29 connecting successively.
Described intermediate frequency demodulation module: input signal is carried out to quadrature demodulation, produce analog baseband signal, carry out data processing to the baseband portion of LTE channel simulator; In intermediate frequency demodulation module, insert an IF-FRE synthesizer that phase place is adjustable, make the local oscillation signal phase place of input adjustable, realize the adjustable function of radio frequency reception phase place.
Described local oscillator module: radio-frequency (RF) local oscillator signal is provided to LTE channel simulator.As shown in Figure 2, described local oscillator module comprises A IF-FRE synthesizer 22, rf frequency synthesizer 21 and B IF-FRE synthesizer 23, described rf frequency synthesizer 21 provides local oscillation signal for A radio-frequency (RF) mixer 11 and C radio-frequency (RF) mixer 18, described A IF-FRE synthesizer 22 is for B radio-frequency (RF) mixer 15 provides local oscillation signal, and described B IF-FRE synthesizer 23 provides local oscillation signal for intermediate frequency demodulation module.
Described one-chip computer module is controlled the chip of wide band radio-frequency numerical-control attenuator 3, radio frequency hilted broadsword four throw switches 5, B radio frequency band filter 7, C radio frequency band filter 8, matching module 9, radio frequency single-pole double-throw switch (SPDT) 10, intermediate frequency single-pole double-throw switch (SPDT) 20, A intermediate frequency numerical-control attenuator 26, B intermediate frequency numerical-control attenuator 28, A IF-FRE synthesizer 22, rf frequency synthesizer 21 and B IF-FRE synthesizer 23.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a high-performance LTE channel simulator wideband radio receiver, is characterized in that: comprise broadband radio-frequency power detected amplitude adjusting module, segmentation variable-frequency filtering module, intermediate frequency automatic electric-level control module, intermediate frequency demodulation module and local oscillator module;
Described broadband radio-frequency power detected amplitude adjusting module: the power to input signal detects: if input signal power is greater than threshold value, input signal is carried out to attenuation processing, then the signal after attenuation processing is sent to segmentation variable-frequency filtering module; If input signal is less than or equal to threshold value, input signal directly by and send to segmentation variable-frequency filtering module;
Described segmentation variable-frequency filtering module: input signal is carried out to frequency-division section processing, for different frequency ranges, carry out respectively, after variable-frequency filtering processing separately, all becoming intermediate-freuqncy signal, then the intermediate-freuqncy signal obtaining is sent to intermediate frequency automatic electric-level control module;
Described intermediate frequency automatic electric-level control module: the level that input signal power is greater than to threshold range is decayed, sends to intermediate frequency demodulation module after adjusting in threshold range; Level to input signal power in threshold range, directly sends to intermediate frequency demodulation module; The level that input signal power is less than to threshold range amplifies, and sends to intermediate frequency demodulation module after adjusting in threshold range;
Described intermediate frequency demodulation module: input signal is carried out to quadrature demodulation, produce analog baseband signal, carry out data processing to the baseband portion of LTE channel simulator; In intermediate frequency demodulation module, insert an IF-FRE synthesizer that phase place is adjustable, make the local oscillation signal phase place of input adjustable, realize the adjustable function of radio frequency reception phase place;
Described local oscillator module: radio-frequency (RF) local oscillator signal is provided to LTE channel simulator.
2. high-performance LTE channel simulator wideband radio receiver according to claim 1, it is characterized in that: described broadband radio-frequency power detected amplitude adjusting module comprises braodband directional coupler (1), limiting amplifier (2), wide band radio-frequency numerical-control attenuator (3) and the amplifier (4) connecting successively, input signal is via braodband directional coupler (1) input, and wideband radio frequency amplifier (31) and wide band radio-frequency wave detector (32) carry out power detection to the output signal of braodband directional coupler (1).
3. high-performance LTE channel simulator wideband radio receiver according to claim 2, it is characterized in that: described segmentation variable-frequency filtering module, the input signal of 400MHz～6GHz is carried out to frequency-division section processing, for different frequency ranges, carry out respectively after variable-frequency filtering processing separately, all become the intermediate-freuqncy signal of 1.2GHz, then the intermediate-freuqncy signal of the 1.2GHz obtaining is sent to intermediate frequency automatic electric-level control module.
4. high-performance LTE channel simulator wideband radio receiver according to claim 3, is characterized in that: described segmentation variable-frequency filtering module:
First 400～2GHz input signal enters after low pass filter (6) and A radio-frequency (RF) mixer (11) successively by radio frequency hilted broadsword four throw switches (5), and the frequency of signal is become to 3.2GHz; And then enter successively after A radio frequency amplifier (12), A radio frequency band filter (13), B radio frequency amplifier (14) and B radio-frequency (RF) mixer (15), the frequency of signal is become to 1.2GHz; Finally by A intermediate frequency amplifier (16) and intermediate frequency single-pole double throw quick closing valve (20), arrive intermediate frequency automatic electric-level control module;
2～6GHz input signal is first by radio frequency hilted broadsword four throw switches (5), one tunnel is switched to B radio frequency band filter (7) radiofrequency signal of 2～4GHz is carried out to filtering processing, another road is switched to C radio frequency band filter (8) radiofrequency signal of 4～6GHz is carried out to filtering, two paths of signals synthesizes respectively the radiofrequency signal of a 2～6GHz who has processed after filtering by radio frequency single-pole double-throw switch (SPDT) (10), the radiofrequency signal of the 2～6GHz obtaining is passed through the radiofrequency signal that is mixed to 1.2GHz under C wideband radio frequency amplifier (17) and C radio-frequency (RF) mixer (18) successively, the radiofrequency signal of the 1.2GHz obtaining arrives intermediate frequency automatic electric-level control module by B intermediate frequency amplifier (19) and intermediate frequency single-pole double-throw switch (SPDT) (20),
The remaining road matching connection load (9) of radio frequency hilted broadsword four throw switches (5).
5. high-performance LTE channel simulator wideband radio receiver according to claim 4, is characterized in that: described intermediate frequency automatic electric-level control module comprises intermediate-frequency filter (24), C intermediate frequency amplifier (25), A intermediate frequency numerical-control attenuator (26), D intermediate frequency amplifier (27), B intermediate frequency numerical-control attenuator (28) and the E intermediate frequency amplifier (29) connecting successively.
6. high-performance LTE channel simulator wideband radio receiver according to claim 5, it is characterized in that: described local oscillator module comprises A IF-FRE synthesizer (22), rf frequency synthesizer (21) and B IF-FRE synthesizer (23), described rf frequency synthesizer (21) provides local oscillation signal for A radio-frequency (RF) mixer (11) and C radio-frequency (RF) mixer (18), described A IF-FRE synthesizer (22) provides local oscillation signal for B radio-frequency (RF) mixer (15), and described B IF-FRE synthesizer (23) provides local oscillation signal for intermediate frequency demodulation module.
7. high-performance LTE channel simulator wideband radio receiver according to claim 6, it is characterized in that: also comprise single chip control module and power module, described one-chip computer module is to wide band radio-frequency numerical-control attenuator (3), radio frequency hilted broadsword four throw switches (5), B radio frequency band filter (7), C radio frequency band filter (8), matching module (9), radio frequency single-pole double-throw switch (SPDT) (10), intermediate frequency single-pole double-throw switch (SPDT) (20), A intermediate frequency numerical-control attenuator (26), B intermediate frequency numerical-control attenuator (28), A IF-FRE synthesizer (22), the chip of rf frequency synthesizer (21) and B IF-FRE synthesizer (23) is controlled.
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| CN106877946A (en) * | 2017-01-18 | 2017-06-20 | 上海创远仪器技术股份有限公司 | A kind of high-performance channel simulator automatically controls receiver and its checking device |
| CN108092626A (en) * | 2017-12-29 | 2018-05-29 | 陕西海泰电子有限责任公司 | A kind of broadband Larger Dynamic down conversion module |
| CN108809459A (en) * | 2017-05-01 | 2018-11-13 | 美国电磁兼容测试系统公司 | The system and method for power control for aerial RF environment emulators |
| CN108923807A (en) * | 2018-07-26 | 2018-11-30 | 北京遥感设备研究所 | A kind of S-band reception device of Deceiving interference |
| CN110149122A (en) * | 2019-06-18 | 2019-08-20 | 电子科技大学 | A kind of the radio frequency self-interference compensation device and method of wide frequency coverage |
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| CN114553335A (en) * | 2020-11-25 | 2022-05-27 | 上海畅恒自动化设备有限公司 | Fast full-channel power detection circuit structure for self-adaptive channel selection |
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| CN106877946B (en) * | 2017-01-18 | 2020-09-18 | 上海创远仪器技术股份有限公司 | High-performance channel simulator automatic control receiver and verification device thereof |
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| CN108809459B (en) * | 2017-05-01 | 2021-06-11 | 美国电磁兼容测试系统公司 | System and method for power control of an over-the-air RF environment emulator |
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| CN108923807A (en) * | 2018-07-26 | 2018-11-30 | 北京遥感设备研究所 | A kind of S-band reception device of Deceiving interference |
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| CN110149122A (en) * | 2019-06-18 | 2019-08-20 | 电子科技大学 | A kind of the radio frequency self-interference compensation device and method of wide frequency coverage |
| WO2021056642A1 (en) * | 2019-09-24 | 2021-04-01 | 安捷利（番禺）电子实业有限公司 | Millimeter-wave communication system based on directional antennas facing fixed directions |
| CN111464243A (en) * | 2020-04-02 | 2020-07-28 | 上海航天测控通信研究所 | Down converter for communication simulator |
| CN114553335A (en) * | 2020-11-25 | 2022-05-27 | 上海畅恒自动化设备有限公司 | Fast full-channel power detection circuit structure for self-adaptive channel selection |
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