CN103297076A - Short-wave broadband multi-channel receiving device and method - Google Patents
Short-wave broadband multi-channel receiving device and method Download PDFInfo
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- CN103297076A CN103297076A CN2013101788883A CN201310178888A CN103297076A CN 103297076 A CN103297076 A CN 103297076A CN 2013101788883 A CN2013101788883 A CN 2013101788883A CN 201310178888 A CN201310178888 A CN 201310178888A CN 103297076 A CN103297076 A CN 103297076A
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Abstract
The invention belongs to the technical field of short-wave multi-channel receiving, and discloses a short-wave broadband multi-channel receiving device and method. The short-wave broadband multi-channel receiving device comprises an antenna, a power divider, first to Nth channels, a combiner and an analog-digital converter, wherein the antenna is used for receiving radio frequency signals, the power divider is used for dividing the radio frequency signals into first to Nth channels of signals, the first to N channels are used for respectively receiving the N channels of signals and subjecting the same to filtering, automatic gain control and amplifying, the combiner is used for combining the N channels of signals to one channel of signals, and the analog-digital converter is used for subjecting the signals output by the combiner to analog-digital conversion. The short-wave broadband multi-channel receiving device and method have the advantages that signal non-linear distortion caused by frequency conversion of a simulation domain is reduced, and the short-wave broadband multi-channel receiving device has the advantages of small size, light weight and high expansibility.
Description
Technical field
The invention belongs to shortwave multichannel reception technique field, particularly a kind of short wave bandwidth multichannel receiving system and method for reseptance.
Background technology
Traditional short-wave receiver front end generally adopts the multistage frequency conversion technology, to be transferred to intermediate frequency from the high-frequency signal solution of antenna, and then be for further processing, the application of the superheterodyne receiver framework of this multistage frequency conversion is still very extensive, but the pressure of reducing cost of considering that Modern Communication System faces, minification, the design engineer have to do everything possible remove in the middle of frequency changer circuit.For a long time, people also always explore realizing the solution of totally digitilized receiver, namely use the ADC(analog to digital converter) Direct Digitalization is from the radiofrequency signal of antenna and bank of filters.But when the short-wave receiver that is to use this multistage frequency conversion realizes that multichannel receives, because each channel all needs corresponding radio circuit, can cause that the short-wave receiver volume is big, cost is high, very flexible.
The radio frequency Direct Digitalization is the development trend of software radio.Recent years, owing to obtained marked improvement in the computing capability of hardware device, digitizing technique is able to further close to the radio-frequency antenna end, thereby can gradually reduce the simulation process link.Radio frequency Direct Digital technology has become a key areas of present software radio development, it also is an important step that the radio-frequency front-end that brings is thus handled, according to the open source literature data of looking into, also do not have at present ripe product to occur at home, have only the part laboratory to carry out relevant research work.
Because the digital signal processor of " radio frequency Direct Digitalization " Technology Need ultra high-speed adc (ADC), digital to analog converter (DAC), ultra-wide band filter, broadband dual-mode antenna, powerful calculating ability, high-speed data memory cell and hardware platform such as bus structures efficiently, in a short time at common wireless communication frequency band (2MHz～3GHz) can't realize, can only realize in low-frequency range, for example can realize at following wave band: shortwave HF wave band (1.5MHz～30MHz) or super part shortwave VHF wave band (30MHz～88MHz).
In addition, the short-wave radio set that we are present substantially all is to adopt the frequency division single, can only be simultaneously the signal of an a kind of modulation system of frequency be received and demodulation.
Summary of the invention
The objective of the invention is to propose a kind of short wave bandwidth multichannel receiving system and method for reseptance.Volume of the present invention is little, in light weight, reliability is high, cost is low, have higher autgmentability.
A kind of short wave bandwidth multichannel receiving system comprises: be used for received RF signal antenna, be used for radiofrequency signal be divided into the 1 road signal to the N road signal power splitter, be used for receiving respectively N road signal and respectively N road signal carried out filtering, automatic gain control and the 1st passage to the N passage that amplifies, be used for N road signal being combined into the mixer of one road signal and being used for the signal of mixer output is carried out analog-to-digital analog to digital converter, N is the natural number greater than 1.
Preferably, the i passage comprises: be used for to the i road signal of power splitter output carry out low-pass filtering low pass filter, be used for signal to low pass filter output and carry out the automatic gain controller of automatic gain control and be used for the preamplifier that the signal to automatic gain controller output amplifies, i gets 1 to N.
Preferably, the cut-off frequency of described low pass filter is 30MHz.
Short wave bandwidth multichannel receiving system of the present invention also comprises: the Field Programmable Gate Array that is used for the digital signal of analog to digital converter output is carried out channel distribution.
A kind of short wave bandwidth multichannel method of reseptance of the present invention may further comprise the steps:
S1: the broadband rf signal that receives from antenna is divided into the 1 road signal to the N road signal through power splitter, and the 1 road signal to the N road signal enters the 1st passage to the N passage respectively, and N is the natural number greater than 1.
S2: the 1 road signal to the N road signal carries out filtering, automatic gain control respectively and amplifies in the 1st passage to the N passage.
S3: mixer merges the signal of the 1st passage to the N passage output, and the signal after will merging is sent into analog to digital converter and carried out analog-to-digital conversion.
Short wave bandwidth multichannel method of reseptance of the present invention, also comprise: behind step S3, digital signal after analog-to-digital conversion is inputed in the Field Programmable Gate Array, digital local frequency is set in the programmable gate array device at the scene divides each output channel, and then the multichannel short-wave signal received with demodulation export.
Beneficial effect of the present invention is:
The first, the present invention directly delivers to the analog-to-digital conversion device to radiofrequency signal and samples, and finishes digitlization, thus can make signal early enter numeric field, finish the frequency conversion of signal at numeric field, can reduce the signal non-linear distortion that the analog domain frequency conversion produces.
The second, the present invention directly delivers to the analog-to-digital conversion device to radiofrequency signal and samples, thereby can reduce number of devices, makes that shortwave multichannel receiver volume reduces, weight saving.
Three, because radiofrequency signal has directly entered numeric field, therefore can finish different requirements by changing different software, can realize the receiver of types such as multi-mode, multi-functional, multichannel, and do not need to change corresponding hardware circuit, flexibility and the autgmentability of receiver function upgrading have been increased, shorten the Products Development cycle, reduced risk and the development cost of model change.
Description of drawings
Fig. 1 is a kind of structure chart of short wave bandwidth multichannel receiving system.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, short wave bandwidth multichannel receiving system of the present invention comprises: be used for to receive broadband rf signal antenna, be used for radiofrequency signal be divided into the 1 road signal to the N road signal power splitter, be used for receiving respectively N road signal and respectively N road signal carried out filtering, automatic gain control and the 1st passage to the N passage that amplifies, be used for N road signal being combined into the mixer of one road signal and being used for the signal of mixer output is carried out analog-to-digital analog to digital converter.
Preferably, the i passage comprises: be used for to the i road signal of power splitter output carry out low-pass filtering low pass filter, be used for signal to low pass filter output and carry out the automatic gain controller of automatic gain control and be used for the preamplifier that the signal to automatic gain controller output amplifies, i gets 1 to N.
Preferably, the cut-off frequency of low pass filter is 30MHz.
Preferably, short wave bandwidth multichannel receiver of the present invention also comprises: the Field Programmable Gate Array (FPGA) that is used for the digital signal of analog to digital converter output is carried out channel distribution.
A kind of short wave bandwidth multichannel method of reseptance of the present invention may further comprise the steps:
S1: the broadband rf signal that receives from antenna is divided into the 1 road signal to the N road signal through power splitter, and the 1 road signal to the N road signal enters the 1st passage to the N passage (being analog channel) respectively.
S2: the 1 road signal to the N road signal carries out filtering, automatic gain control respectively and amplifies in the 1st passage to the N passage.
S3: mixer merges the signal of the 1st passage to the N passage output, and the signal after will merging sends into analog to digital converter and carry out analog-to-digital conversion, thereby finishes the digitized processing of signal.
Short wave bandwidth multichannel method of reseptance of the present invention, also comprise: behind step S3, digital signal after analog-to-digital conversion is inputed in the Field Programmable Gate Array, digital local frequency is set in the programmable gate array device at the scene divides each output channel, and then the multichannel short-wave signal received with demodulation export.
The short wave bandwidth multichannel receiving system that the present invention realizes is based on the RF digitization technology, radiofrequency signal is directly delivered to analog to digital converter samples, finish digitlization, thereby can make the enter numeric field of signal than morning, adopt various modern signal processing algorithms, improve the overall performance of system greatly.Thereby can pass through the modern signal processing algorithm, finish the division of channel at numeric field.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. short wave bandwidth multichannel receiving system, it is characterized in that, comprise: be used for received RF signal antenna, be used for radiofrequency signal be divided into the 1 road signal to the N road signal power splitter, be used for receiving respectively N road signal and respectively N road signal carried out filtering, automatic gain control and the 1st passage to the N passage that amplifies, be used for N road signal being combined into the mixer of one road signal and being used for the signal of mixer output is carried out analog-to-digital analog to digital converter, N is the natural number greater than 1.
2. a kind of short wave bandwidth multichannel receiving system as claimed in claim 1, it is characterized in that, the i passage comprises: be used for to the i road signal of power splitter output carry out low-pass filtering low pass filter, be used for signal to low pass filter output and carry out the automatic gain controller of automatic gain control and be used for the preamplifier that the signal to automatic gain controller output amplifies, i gets 1 to N.
3. the described a kind of short wave bandwidth multichannel receiving system of claim 2 is characterized in that the cut-off frequency of described low pass filter is 30MHz.
4. a kind of short wave bandwidth multichannel receiving system as claimed in claim 1 is characterized in that, also comprises: the Field Programmable Gate Array that is used for the digital signal of analog to digital converter output is carried out channel distribution.
5. a short wave bandwidth multichannel method of reseptance based on the described a kind of short wave bandwidth multichannel receiving system of claim 1, is characterized in that, may further comprise the steps:
S1: the broadband rf signal that receives from antenna is divided into the 1 road signal to the N road signal through power splitter, and the 1 road signal to the N road signal enters the 1st passage to the N passage respectively, and N is the natural number greater than 1;
S2: the 1 road signal to the N road signal carries out filtering, automatic gain control respectively and amplifies in the 1st passage to the N passage;
S3: mixer merges the signal of the 1st passage to the N passage output, and the signal after will merging is sent into analog to digital converter and carried out analog-to-digital conversion.
6. a short wave bandwidth multichannel method of reseptance is characterized in that, may further comprise the steps:
S1: the broadband rf signal that receives from antenna is divided into the 1 road signal to the N road signal through power splitter, and the 1 road signal to the N road signal enters the 1st passage to the N passage respectively, and N is the natural number greater than 1;
S2: the 1 road signal to the N road signal carries out filtering, automatic gain control respectively and amplifies in the 1st passage to the N passage;
S3: mixer merges the signal of the 1st passage to the N passage output, and the signal after will merging is sent into analog to digital converter and carried out analog-to-digital conversion.
7. a kind of short wave bandwidth multichannel method of reseptance as claimed in claim 6, it is characterized in that, also comprise: behind step S3, digital signal after analog-to-digital conversion is inputed in the Field Programmable Gate Array, digital local frequency is set in the programmable gate array device at the scene divides each output channel, and then the multichannel short-wave signal received with demodulation export.
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| CN104467888A (en) * | 2014-12-31 | 2015-03-25 | 陕西烽火电子股份有限公司 | Multi-channel shortwave receiving device |
| CN105226361A (en) * | 2015-08-27 | 2016-01-06 | 东莞前沿技术研究院 | Power distribution method and device |
| CN107749764A (en) * | 2017-09-15 | 2018-03-02 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of sampling of multichannel Larger Dynamic signal |
| CN108206701A (en) * | 2016-12-20 | 2018-06-26 | 联芯科技有限公司 | Wide band radio-frequency sending device, reception device, sending method and method of reseptance |
| CN114844576A (en) * | 2022-04-19 | 2022-08-02 | 深圳市玖合鑫通讯技术有限公司 | Simulation signal generation device, beam forming simulation system and simulation method |
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Application publication date: 20130911 |