CN101635575A - Four-channel short wave digital signal processing platform based on software radio - Google Patents
Four-channel short wave digital signal processing platform based on software radio Download PDFInfo
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- CN101635575A CN101635575A CN 200910306110 CN200910306110A CN101635575A CN 101635575 A CN101635575 A CN 101635575A CN 200910306110 CN200910306110 CN 200910306110 CN 200910306110 A CN200910306110 A CN 200910306110A CN 101635575 A CN101635575 A CN 101635575A
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Abstract
The invention discloses a four-channel short wave digital signal processing platform based on software radio, which comprises a data acquisition part, a digital signal processing part and a data transmission part, wherein the digital signal processing part comprises a four-channel digital down converter and a field programmable logic array, each channel of the four-channel digital down converter consists of an input selection unit, a digital mixing unit, a CIC unit, a data routing unit, an FIR filtering unit, a half-band filtering unit and a resampling filtering unit, the independent work or the cascade work of the four channels is controlled by software, and the control method is that the output of the last FIR filtering unit is extracted and then used as the input of the next FIR filtering unit through the data routing unit during the cascade work so as to process signals with the bandwidth of at most 2.048MHz and process extremely narrow bandwidth.
Description
Technical field
The present invention relates to digital processing field, especially relate to a kind of four-channel shortwave digital signal processing platform based on software radio.
Background technology
The basic thought of software and radio technique is that the A/D converter with the broadband is positioned as close to radio-frequency antenna, promptly as early as possible the analog signal that receives is converted into digital signal, realizes the various functions of system to the full extent by dsp software.
Existing short-wave signal treatment system as shown in Figure 1, comprises the Transmit Receive Unit, RF converting unit, A/D unit, digital intermediate frequency unit, DSP unit and the terminal interface that connect successively, and the signal type of processing is limited, can only handle conventional modulation signal usually.The signal bandwidth of handling is limited, and common processing bandwidth can not surpass 15KHz, and the processing bandwidth of some users' needs can reach 512KHz usually, and for extremely narrow signal, bandwidth is low to moderate tens Hz even the signal of low bandwidth more, also can't handle.
Summary of the invention
The purpose of this invention is to provide a kind of four-channel shortwave digital signal processing platform based on software radio, can handle the digital signal of four channels simultaneously, and can control that four-way works independently or cascade operation by computer program, to realize wider processing bandwidth.
Comprise that the specific implementation method is as follows:
A kind of four-channel shortwave digital signal processing platform based on software radio, comprise part of data acquisition, Digital Signal Processing part and tcp data segment, described part of data acquisition is divided into four groups, and every group connects and composes successively by wireless signal receiving system, overload protecting circuit, impedance inverter circuit and A/D converter; Described Digital Signal Processing partly comprises four-way digital down converter, field programmable logic array, four road inputs of four-way digital down converter link to each other with four groups of A/D converter outputs of part of data acquisition respectively, the four-way digital down converter is connected with field programmable logic array is two-way, and field programmable logic array links to each other with tcp data segment; Described tcp data segment comprises ethernet controller and USB controller; Tcp data segment links to each other with user interface, each passage of four-way digital down converter constitutes by input selected cell, digital mixing unit, CIC unit, data routing unit, FIR filter unit, semi-band filtering unit and resampling filter unit, four-way work alone or cascade operation by software control, control method is to make the output of a FIR filter unit through after extracting when cascade operation, by the data routing unit, realize as the input of next FIR filter unit.
The part of data acquisition course of work of the present invention: four road aerial signals that the wireless signal receiving system receives are through overload protecting circuit; pass through impedance inverter circuit then; with with the input impedance matching of A/D converter, after behind the A/D converter, the output high-speed digital signal.
The Digital Signal Processing part course of work of the present invention: four road high-speed a/d signals enter four input channels of digital down converter respectively, through digital mixing, extraction, filtering, are input to field programmable logic array.Field programmable logic array is used to realize data markers, framing or metadata cache.
The tcp data segment course of work of the present invention: field programmable logic array is sent ethernet controller or USB controller with the data that receive, and submits user or computer at last to, in order to subsequent treatment.
Also can comprise general input, output interface (GPIO) between described field programmable logic array and user interface, be used for signal bridge is carried out hardware expansion.
Core cell digital down converter and analog down converter that the present invention uses are consistent, all are input signal and local oscillated signal mixing, through the low pass filter filters out high fdrequency component, obtain baseband signal then.The shortcoming of analog down converter is: because two-way multiplier and the consistency of low-pass filtering own are bad, cause I, Q channel amplitude imbalance, phase quadrature error is very big, and has temperature drift, and stability is also bad.Yet in digital down converter, multiplier and low pass filter can be accomplished in full accord, therefore do not have I, the unbalanced problem of Q channel amplitude.In addition, characteristics such as to be easier to also be that analog down converter is incomparable for the control of digital down converter and modification.
Four-way work alone or cascade operation by software control, control method is to make the output of a FIR filter unit through after extracting when cascade operation, by the data routing unit, to realize as the input of next FIR filter unit. digital down converter has four independently input, output channels, and the processing bandwidth of each passage can reach 0.512MHz.By four passage cascades, can handle the signal of 2.048MHz bandwidth at the most, also can handle very narrow bandwidth, narrow to tens Hz even the signal of low bandwidth more.
Beneficial effect of the present invention:
A kind of four-channel shortwave digital signal processing platform of the present invention based on software radio, can handle the digital signal of four channels simultaneously, and can control that four-way works independently or cascade operation by computer program, to realize the handling signal of 2.048MHz bandwidth at the most, also can handle very narrow bandwidth.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a software radio architecture block diagram in the background technology;
Fig. 2 is a structured flowchart of the present invention;
Fig. 3 is a four-way tupe block diagram among the embodiment;
Fig. 4 is a triple channel tupe block diagram among the embodiment;
Fig. 5 is two passages (a 1) tupe block diagram among the embodiment;
Fig. 6 is two passages (a 2) tupe block diagram among the embodiment;
Fig. 7 is a single-pass process pattern block diagram among the embodiment;
Fig. 8 is a cascade mode schematic diagram between the digital down converter inner passage among the present invention.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Embodiment one: as Fig. 2, shown in Figure 3, a kind of four-channel shortwave digital signal processing platform based on software radio adopts the four-way tupe.Comprise part of data acquisition, Digital Signal Processing part and tcp data segment, described part of data acquisition is divided into four groups, and every group connects and composes successively by wireless signal receiving system, overload protecting circuit, impedance inverter circuit and A/D converter; Described Digital Signal Processing partly comprises four-way digital down converter, field programmable logic array, four road inputs of four-way digital down converter link to each other with four groups of A/D converter outputs of part of data acquisition respectively, the four-way digital down converter is connected with field programmable logic array is two-way, and field programmable logic array links to each other with tcp data segment; Described tcp data segment comprises ethernet controller, USB controller and general input, output interface (GPIO); Tcp data segment links to each other with user interface, and each passage of four-way digital down converter constitutes by input selected cell, digital mixing unit, CIC unit, data routing unit, FIR filter unit, semi-band filtering unit and resampling filter unit.Adopt the four-way tupe in the present embodiment, under this pattern, each passage works independently, do not do cascade, in each passage, the output of FIR filter unit is all without extracting the return data routing unit, but directly enters the semi-band filtering unit input of passage separately.
Embodiment two: as Fig. 2, Fig. 4 and shown in Figure 8, and a kind of four-channel shortwave digital signal processing platform based on software radio, its structure is with embodiment one.Adopt the triple channel tupe in the present embodiment, under this pattern, the output of one passage FIR filter unit of four-way digital down converter is through extracting the input of return data routing unit as two passage FIR filter units, such one, two passage cascades are used, and realize the triple channel tupe.
Embodiment three: as Fig. 2, Fig. 5 and shown in Figure 8, and a kind of four-channel shortwave digital signal processing platform based on software radio, its structure is with embodiment one.Adopt two passage tupes in the present embodiment, under this pattern, the output of one passage FIR filter unit of four-way digital down converter is through extracting the input of return data routing unit as two passage FIR filter units, the output of two passage FIR filter units is again through extracting the input of return data routing unit as triple channel FIR filter unit, such one, two, triple channel cascade is used, four-way works independently, and realizes two passage tupes.
Embodiment four: as Fig. 2, Fig. 6 and shown in Figure 8, and a kind of four-channel shortwave digital signal processing platform based on software radio, its structure is with embodiment one.Adopt another kind of cascade system to realize two passage tupes in the present embodiment, under this pattern, the output of one passage FIR filter unit of four-way digital down converter is through extracting the input of return data routing unit as two passage FIR filter units, the output of triple channel FIR filter unit is through extracting the input of return data routing unit as four-way FIR filter unit, such one, two passage cascades are used, three, the four-way cascade is used, and realizes two passage tupes.
Embodiment five: as Fig. 2, Fig. 7 and shown in Figure 8, and a kind of four-channel shortwave digital signal processing platform based on software radio, its structure is with embodiment one.Adopt the single-pass process pattern in the present embodiment, under this pattern, the output of one passage FIR filter unit of four-way digital down converter is through extracting the input of return data routing unit as two passage FIR filter units, the output of two passage FIR filter units is again through extracting the input of return data routing unit as triple channel FIR filter unit, the output of triple channel FIR filter unit is again through extracting the input of return data routing unit as four-way FIR filter unit, such one, two, three, the four-way cascade operation, the processing bandwidth of each passage can reach 0.512MHz.By four passage cascades, can handle the signal of 2.048MHz bandwidth.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (2)
1. four-channel shortwave digital signal processing platform based on software radio, comprise part of data acquisition, Digital Signal Processing part and tcp data segment, described part of data acquisition is divided into four groups, and every group connects and composes successively by wireless signal receiving system, overload protecting circuit, impedance inverter circuit and A/D converter; Described Digital Signal Processing partly comprises four-way digital down converter, field programmable logic array, four road inputs of four-way digital down converter link to each other with four groups of A/D converter outputs of part of data acquisition respectively, the four-way digital down converter is connected with field programmable logic array is two-way, and field programmable logic array links to each other with tcp data segment; Described tcp data segment comprises ethernet controller and USB controller; Tcp data segment links to each other with user interface, it is characterized in that: each passage of four-way digital down converter constitutes by input selected cell, digital mixing unit, CIC unit, data routing unit, FIR filter unit, semi-band filtering unit and resampling filter unit, four-way work alone or cascade operation by software control, control method is to make the output of a FIR filter unit through after extracting when cascade operation, by the data routing unit, realize as the input of next FIR filter unit.
2. a kind of four-channel shortwave digital signal processing platform according to claim 1 based on software radio, it is characterized in that: also comprise general input, output interface (GPIO) between described field programmable logic array and user interface, be used for signal bridge is carried out hardware expansion.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447479A (en) * | 2011-11-22 | 2012-05-09 | 福建邮科通信技术有限公司 | Automatic frequency-selecting technology applied to GSM digital repeater |
| CN102694557A (en) * | 2012-06-12 | 2012-09-26 | 成都林海电子有限责任公司 | Multi-channel demodulation signal processing platform based on CPCI (compact programmable communication interface) |
| CN102739263A (en) * | 2012-06-12 | 2012-10-17 | 成都林海电子有限责任公司 | Satellite communication demodulator signal processing platform based on 32-bit PCI (Peripheral Component Interconnect) interface |
| CN103427867A (en) * | 2013-07-26 | 2013-12-04 | 熊猫电子集团有限公司 | Short wave transceiving integration radio frequency module based on Ethernet bus |
| CN104519000A (en) * | 2013-09-30 | 2015-04-15 | 瑞昱半导体股份有限公司 | Method for equalizing transmission frequency spectra of wireless communication transmitters |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175609C (en) * | 2000-10-12 | 2004-11-10 | 中兴通讯股份有限公司 | Multiple carrier software radio transceiver and its intelligent antenna performance improving method |
| CN201114009Y (en) * | 2007-04-17 | 2008-09-10 | 京信通信***（中国）有限公司 | Digital frequency conversion system |
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2009
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447479A (en) * | 2011-11-22 | 2012-05-09 | 福建邮科通信技术有限公司 | Automatic frequency-selecting technology applied to GSM digital repeater |
| CN102694557A (en) * | 2012-06-12 | 2012-09-26 | 成都林海电子有限责任公司 | Multi-channel demodulation signal processing platform based on CPCI (compact programmable communication interface) |
| CN102739263A (en) * | 2012-06-12 | 2012-10-17 | 成都林海电子有限责任公司 | Satellite communication demodulator signal processing platform based on 32-bit PCI (Peripheral Component Interconnect) interface |
| CN102739263B (en) * | 2012-06-12 | 2014-08-06 | 成都林海电子有限责任公司 | Satellite communication demodulator signal processing platform based on 32-bit PCI (Peripheral Component Interconnect) interface |
| CN103427867A (en) * | 2013-07-26 | 2013-12-04 | 熊猫电子集团有限公司 | Short wave transceiving integration radio frequency module based on Ethernet bus |
| CN103427867B (en) * | 2013-07-26 | 2016-08-10 | 熊猫电子集团有限公司 | Shortwave based on industry ethernet transmitting-receiving integrated radio modules |
| CN104519000A (en) * | 2013-09-30 | 2015-04-15 | 瑞昱半导体股份有限公司 | Method for equalizing transmission frequency spectra of wireless communication transmitters |
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