CN105988115A - Analysis system of atmospheric steam microwave detection spectrum - Google Patents
Analysis system of atmospheric steam microwave detection spectrum Download PDFInfo
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Abstract
The invention provides an analysis system of an atmospheric steam microwave detection spectrum. The system comprises an antenna and feed module, a receiver module, a data acquisition module, a power spectrum calculating module, an integration average module and a master control computer in serial connection successively, wherein the antenna and feed module detects and receives radiation brightness temperature signals of the 22.235GHz+/-0.25GHz micro-waveband atmospheric steam absorption line spectrum and window frequency; the receiver module divides the detection signal into two paths of orthogonal analog signals; the data acquisition module converts the two paths of orthogonal analog signals into two paths of orthogonal digital signals; the power spectrum calculating module carries out rapid Fourier transform on the two paths of orthogonal digital signals, and adds the square of one path of orthogonal digital signal to the square of the other path of orthogonal digital signal to generate a power spectrum; the integration average module realizes integration average of single-frame amplitude spectra generated continuously; and the master control computer inverts the atmosphere humidity and the steam contour according to the amplitude spectrum value.
Description
Technical field
The present invention relates to meteorological detection field, particularly to a kind of atmosphere vapour microwave sounding spectral analysis system.
Background technology
In the various gases of earth atmosphere, an aerobic and steam are the one-tenth presenting obvious absorption band in microwave spectrum
Point.Steam is launched by the transition of intramolecule rotational energy level or absorbs radiation, produces rotation in microwave and far infrared are composed
Turn spectral line.By at absorption maximum and near the actinometry of frequency may determine that the steam of air and temperature from
Stratosphere low side is to whole Mesosphere along the Soil profile of height.
Atmospheric temperature and moisture profile are as important meteorologic parameter, for observing the change of air and understanding that it changes
Process significant.Bulky, relatively costly relative to radiosonde (radar), need multiple
The drawbacks such as miscellaneous installation and service condition, it is low, reliable etc. that ground microwave/millimeter wave radiation meter has maintenance cost
Feature.In recent years, it is rapidly progressed as a kind of reliable atmospheric temperature, the Detection Techniques of moisture profile,
It is increasingly becoming a kind of means providing business datum to service.The advantage of Ground-Based Microwave Radiometer is cloud liquid water
Sensitivity higher, the detection for Atmospheric components absorption line has extraordinary observation effect, is calculated by inverting
Method can determine the vertical distribution figure of probe gas from the frequency spectrum detected.Empty on land, passive microwave remote sensing is
The most accurately, the vertical aqueous water flux measurement means that cost is minimum.
Traditional microwave radiometer is usually a narrowband systems, observes the atural object average bright temperature in frequency channel.With
The development of remote sensing technology, for the demand of corresponding bright temperature in observation different spectral passage in solution broad spectrum, produce
Give birth to the ground microwave radiation spectrum analyzer with fine spectrum analysis ability.This possess fine spectrum analysis energy
The novel microwave radiometer of power is also one of technological development direction of passive remote sensing device in recent years.At microwave band, tool
Have analysis of spectrum ability microwave radiometer its mainly to apply be to utilize the steam of microwave section and oxygen absorption spectral line to carry out greatly
Temperature, the remote sensing survey of moisture profile.Microwave radiometer for this type of detection purpose generally uses filtering in early days
The rear end of group form, it is achieved the observation of several side frequency passages, bulky and be difficult to realize big quantity passage
Detection, successive line measurement capability truly receives greatly restriction.
In recent years, along with the high speed development of Digital Electronic Technique and carrying out in a deep going way of Terahertz Technology research, utilize too
The molecular absorption line that hertz spectral coverage is abundant, carries out atmospheric trace gas detection in earth observation field, and at sky
Between field of detecting to carry out the demand of universe interplanetary molecular cloud component detection increasingly stronger, these new application are strong
Promote possess analysis of spectrum ability microwave radiometer development.The EOS-Aura satellite of U.S. NASA is carried
Face limit radiometer (MLS), it is simply that a kind of microwave radiometer using spectral analysis technology.The most utilize at present
Pure digi-tal means, FPGA technology and Acqiris signal analyzer, it is achieved that possess the light of successive line measurement capability
Spectrometer.
At present, the receiver front end of microwave radiation spectrum analyzer system uses the single channel way of output to be detected by atmosphere vapour
Data are sent into rear end and are carried out data process.According to nyquist sampling law, sample rate is more than or equal to data bandwidth
During twice, the result of sampled data could completely retain the information in primary signal.In broadband analysis of spectrum work side
Need under formula to realize 1GHz bandwidth observation scope, then spectrum analyzer need to be at least up to the requirement of 2GHz sample rate,
It is higher, in the side such as hardware resource and sequential correctness that this carries out real time handling requirement for rear end to high-speed sample data
Face is difficult to；Also make spectral analysis system realize fast Fourier transform process time be difficult to improve conversion count, unfavorable
In improving system sensitivity.
Summary of the invention
It is an object of the invention to overcome microwave current transmitted spectrum to analyze the drawbacks described above that system exists, it is provided that one
Planting atmosphere vapour microwave sounding spectral analysis system, the receiver module of this system uses two-stage local oscillator output two-way orthogonal
Signal, reduces the sample rate of data acquisition module；Whole system has low cost, and performance is high, low in energy consumption, clever
The feature that sensitivity is high.
For achieving the above object, the invention provides a kind of atmosphere vapour microwave sounding spectral analysis system, including successively
Series connection: antenna is put down with power feeding module, receiver module, data acquisition module, spectra calculation module, integration
All module and main control computers；
Described antenna and power feeding module are used for detecting and receive 22.235GHz ± 0.25GHz microwave section atmosphere vapour and absorb
The radiation brightness signal of line spectrum and window frequency；Including antenna and feed element；
Described receiver module is for being divided generation two-stage local oscillator, one-level local oscillator by same temperature compensating crystal oscillator after power splitter
17.548GHz, two grades of local oscillators 4.387GHz, it is achieved the detectable signal exporting antenna and power feeding module carries out two-stage
Down coversion；Wherein produce after a down coversion intermediate-freuqncy signal is amplified, carry out 90 degree of merits after Filtering Processing divides, will
Detectable signal is divided into two-way Quadrature analog signal；
Described data acquisition module is orthogonal for the two-way Quadrature analog signal that receiver module exports is converted into two-way
Digital signal, and produce the clock signal of required frequency；Including: data acquisition chip and clock generation chip；
Described spectra calculation module, for carrying out quick Fu to data acquisition module output two-way quadrature digital signal
In leaf transformation, it is achieved the conversion from time domain to frequency domain, and by two-way quadrature signal amplitude spectrum square after be added produce merit
Rate is composed；
Described integral mean module is for realizing integral mean to the single frames amplitude spectrum continuously generated；
Described main control computer for calculating the radiation brightness of atmosphere vapour according to amplitude spectrum, thus is finally inversed by air
Humidity, water vapor profile.
In technique scheme, described system also includes being sequentially connected in series: self-correction module, microprocessor module and
Bus communication module；Wherein said bus communication module is connected with described data acquisition module；
Described self-correction module: center between sampled data and the clock that circuit length difference between plate electrode is not caused
The phase offset of alignment is calibrated, it is ensured that system can correctly be sampled at high data rates；
Described microprocessor module: for providing normal work schedule for whole system, send control instruction；Bag
Include: microprocessor chip；
Described bus communication module: for sending configuration data by serial communication bus to described data acquisition chip,
Make data acquisition chip to microprocessor module transmission bit wide 7 bit, the data of the low-voltage differential of speed 500MSPS
Gathering signal, making clock generation chip transmission frequency is 250MHz low-voltage differential clock signal.
In technique scheme, described receiver module includes: isolator, first stage amplifier, one-level bandpass filtering
Device, one-level frequency mixer, put in first, automatic gain control unit, 90 degree of electric bridges, two grades of frequency mixers, in second
Put, two two grades of band filters and two two-stage amplifiers；
Described isolator is used for preventing receiver module internal signal from revealing；
Described first stage amplifier is amplified for the detectable signal exporting described antenna and power feeding module；
Described one-level band filter is amplified and Out-of-band rejection for the signal exporting described first stage amplifier,
Producing a mid frequency is that 22.235GHz carries a width of 500MHz radiofrequency signal；
Described one-level frequency mixer has been used for the radiofrequency signal of described one-level band filter output to one-level intermediate-freuqncy signal
Frequency downconverted process；
Put in described first and be amplified and Out-of-band rejection for the signal that described one-level frequency mixer is exported, produce one
Individual mid frequency is the 4.687GHz one-level intermediate-freuqncy signal with a width of 500MHz；
Described automatic gain control unit, for the system gain of regulated reciver module, makes the output of receiver module
Voltage is maintained in constant level；
Described 90 degree of electric bridges divide for the one-level intermediate-freuqncy signal putting output in described first is carried out merit, and output two-way is just
Hand over analogue signal；
Described two grades of frequency mixers are used for the two-way analogue orthogonal signal to described 90 degree of electric bridges output through carrying out one-level intermediate frequency
Signal processes to the frequency downconverted of two grades of intermediate-freuqncy signals；
Put for two-way analogue orthogonal signal is directly exported in described second, as the application of total power radiometer；
Said two band filter and two two-stage amplifiers are respectively used to two-way analogue orthogonal signal
Reason, producing two-way mid frequency is 0.3GHz, and bandwidth is two grades of intermediate-freuqncy signals of 500MHz.
In technique scheme, described spectra calculation module includes: two 16k-fast Fourier transform butterfly fortune
Calculate engine, two multipliers and an adder；
Described 16k-fast Fourier transform butterfly computation engine has independent storage organization, is used for storing data acquisition
The input data of module and butterfly computation intermediate object program；Operating frequency is 250MHz, it is achieved once to 2MPoint science
Data carry out fast Fourier transform, and wherein M is positive integer, it is achieved digital signal conversion from time domain to frequency domain,
And possess and carry out fast Fourier transform to when previous frame data simultaneously, the result of output previous frame data, and load
The ability of next frame input data, it is achieved continuous print fast Fourier transform；
The complex frequency domain pair that two 16k-fast Fourier transform butterfly computation engines are exported by said two multiplier respectively
Component is answered to carry out square operation；
The output result of two multipliers is carried out summation operation, the single frames amplitude of output detectable signal by described adder
Spectrum.
In technique scheme, described integral mean module includes: dual-ported memory；Described dual-ported memory
Storage depth be 2M, work clock is 250MHz；Two port separate configurations of described dual-ported memory,
Work alone；One port working is operated in read states in write state, another port；Control at internal state machine
Under two ports of dual-ported memory are produced write control signals and read control signal, and produce response write address and
Read address signal.
In technique scheme, described dual-ported memory reads in previous frame amplitude spectrum from read port, and when previous
Frame amplitude spectrum inputs depositing of described dual-ported memory by write port after carrying out cumulative mean under write signal control
In reservoir, its cumulative number correspondence time of integration, thus two frame amplitude spectrum are realized integral mean, and export flat
Amplitude spectrum after all.
The advantage of a kind of atmosphere vapour microwave sounding spectrometer of the present invention is:
1, the receiver module of the system of the present invention uses two grades of local oscillator FM of superhet, reduces receiver
This；Filtered the image frequency of for the first time mixing by prefilter, and use mixed electrical bridge to carry out 90 degree of merits to divide,
Ensure that phase accuracy reaches requirement；
2, detectable signal is divided formation two-way orthogonal signalling also through 90 degree of merits by the receiver module of the system of the present invention
Row processes in real time, effectively reduces analysis of spectrum rear end for realizing at a high speed on the premise of meeting nyquist sampling theorem
The timing requirements that data process, stability that the system that ensure that under meeting hardware resource consumption is run and accuracy；
3, the spectra calculation module of the system of the present invention is based on frame data 16k-FFT algorithm, and spectral resolution reaches
To 15Khz, possess fine analysis of spectrum ability, high-resolution water vapor profile can not only be provided, and can realize
Continuously observe, it is provided that the overall process data that synoptic process develops；
4, amplitude spectrum is integrated averagely by the integral mean module of the present invention, effectively reduces the impact of background noise,
It is effectively improved the ability of microwave radiometer spectrum analysis instrument system detection small-signal.
Accompanying drawing explanation
Fig. 1 is the composition frame chart of the atmosphere vapour microwave sounding spectral analysis system of the present invention；
Fig. 2 is the structure composition schematic diagram of the receiver module of the present invention.
Detailed description of the invention
Do below in conjunction with the accompanying drawings and to the present invention and be described in detail further.
As it is shown in figure 1, a kind of atmosphere vapour microwave sounding spectral analysis system, including be sequentially connected in series: antenna and feedback
Electricity module, receiver module, data acquisition module, spectra calculation module, integral mean module and master control calculate
Machine；
Described antenna and power feeding module: be used for detecting and receive 22.235GHz ± 0.25GHz microwave section atmosphere vapour and inhale
The radiation brightness signal of take-up spectrum and window frequency；Including antenna and feed element；
Described receiver module: for being divided generation two-stage local oscillator after power splitter by same temperature compensating crystal oscillator, one-level is originally
Shake 17.548GHz, two grades of local oscillators 4.387GHz, it is achieved the detectable signal exporting antenna and power feeding module carries out two
Level down coversion；Wherein produce after a down coversion intermediate-freuqncy signal is amplified, carry out 90 degree of merits after Filtering Processing divides,
Detectable signal is divided into two-way Quadrature analog signal.
As in figure 2 it is shown, described receiver module includes: isolator, low-noise amplifier (LNA), bandpass filtering
Device, one-level frequency mixer, put in one, automatic gain control unit (AGC), 90 degree of electric bridges, two grades of frequency mixers, two
In put, two two grades of band filters and two two-stage amplifiers；
Described isolator is used for preventing receiver module internal signal from revealing；
Described first stage amplifier is amplified for the detectable signal exporting described antenna and power feeding module；
Described one-level band filter is amplified and Out-of-band rejection for the signal exporting described first stage amplifier,
Producing a mid frequency is that 22.235GHz carries a width of 500MHz radiofrequency signal；
Described one-level frequency mixer has been used for the radiofrequency signal of described one-level band filter output to one-level intermediate-freuqncy signal
Frequency downconverted process；
Put in described first and be amplified and Out-of-band rejection for the signal that described one-level frequency mixer is exported, produce one
Individual mid frequency is the 4.687GHz one-level intermediate-freuqncy signal with a width of 500MHz；
Described automatic gain control unit, for the system gain of regulated reciver module, makes the output of receiver module
Voltage is maintained in constant level；
Described 90 degree of electric bridges divide for the one-level intermediate-freuqncy signal putting output in described first is carried out merit, and output two-way is just
Hand over analogue signal；
Described two grades of frequency mixers are used for the two-way analogue orthogonal signal to described 90 degree of electric bridges output through carrying out one-level intermediate frequency
Signal processes to the frequency downconverted of two grades of intermediate-freuqncy signals；
Put for two-way analogue orthogonal signal is directly exported in described second, as the application of total power radiometer；
Said two band filter and two two-stage amplifiers are respectively used to two-way analogue orthogonal signal
Reason, producing two-way mid frequency is 0.3GHz, and bandwidth is two grades of intermediate-freuqncy signals of 500MHz.
Data acquisition module, for being converted into two-way orthogonal function by the two-way Quadrature analog signal that receiver module exports
Word signal, and produce the clock signal of required frequency；Including: data acquisition chip and clock generation chip.
Spectra calculation module, for carrying out fast Fourier to data acquisition module output two-way quadrature digital signal
Conversion, it is achieved the conversion from time domain to frequency domain, and produce power spectrum by being added after two-way quadrature signal amplitude spectrum square；
Including: two 16k-fast Fourier transform (FFT) butterfly computation engines, two multipliers and an adder；
Described 16k-fast Fourier transform butterfly computation engine has independent storage organization, is used for storing data acquisition
The input data of module and butterfly computation intermediate object program；Operating frequency is 250MHz, it is achieved once to 2MPoint science
Data carry out fast Fourier transform, and wherein M is positive integer；In the present embodiment, M=14, it is achieved in number
The conversion from time domain to frequency domain of the word signal, and possess and carry out fast Fourier transform to when previous frame data simultaneously, defeated
Go out the result of previous frame data, and load the ability of next frame input data, it is achieved continuous print fast Fourier transform；
The complex frequency domain pair that two 16k-fast Fourier transform butterfly computation engines are exported by said two multiplier respectively
Component is answered to carry out square operation；
The output result of two multipliers is carried out summation operation, the single frames amplitude of output detectable signal by described adder
Spectrum.
Described integral mean module: for the single frames amplitude spectrum continuously generated is realized integral mean；Including: both-end
Mouth memorizer；
The storage depth of described dual-ported memory is 2M, work clock is 250MHz；Described dual-ported memory
Two port separate configurations, work alone；One port working is operated in read states in write state, another port；
Under the control of internal state machine, two ports of dual-ported memory are produced write control signal and read control signal,
And produce response write address and read address signal.
Described dual-ported memory reads in previous frame amplitude spectrum from read port, tires out with when previous frame amplitude spectrum
Inputted in the memorizer of described dual-ported memory after adding averagely under write signal control by write port, it is accumulative time
Count the corresponding time of integration, thus two frame amplitude spectrum are realized integral mean, and the amplitude spectrum after output averagely.
This module can effectively reduce to be affected by the issuable relatively macrorelief of random noise signal, and improves the faint letter of detection
Number ability.
Described main control computer for calculating the radiation brightness of atmosphere vapour according to amplitude spectrum, thus is finally inversed by air
Humidity, water vapor profile.
Additionally, what described system also included being sequentially connected in series: self-correction module, microprocessor module and bus communication mould
Block；Wherein said bus communication module is connected with described data acquisition module；
Described self-correction module is center pair between sampled data and the clock not caused circuit length difference between plate electrode
Neat phase offset is calibrated, it is ensured that system can correctly be sampled at high data rates；
Described microprocessor module, for providing normal work schedule for whole system, sends control instruction；Including:
Microprocessor chip；
Described bus communication module is used for sending configuration data by serial communication bus to described data acquisition chip,
Data acquisition chip is made to send the low-voltage differential (LVDS) of bit wide 7 bit rate 500MSPS to microprocessor module
Data acquisition signal, making clock generation chip transmission frequency is 250MHz low-voltage differential clock signal；System subsequently
Work in both modes:
Correction mode: microprocessor module sends one group of special joining by bus communication module to data acquisition module
Put data, the output of data acquisition module is configured to one group of stairstep signal being incremented by continuously and sends to microprocessor mould
Block input, by differentiating the seriality of data acquisition module output signal, adjusts delayed control signal value,
Correction system, by data transfer delay produced by internal circuit configuration, recovers data signal and clock signal center pair
Neat phase relation, reaches can correctly catch the purpose of data under high-speed data transmission rate.Self-calibration process is tied
Shu Hou, delayed control signal value keeps current state constant, and corresponding control signal is set high expression and surveys by self-correction module
Die trial formula effectively and is back to microprocessor module.
Normal mode of operation: microprocessor module, according to returning effective control signal under correction mode, passes through bus
Communication module re-starts configuration to data acquisition module so that it is be operated under normal sample pattern and defeated to receiver
The two-way orthogonal signalling data gone out are acquired.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted.Although
With reference to embodiment, the present invention is described in detail, it will be understood by those within the art that, to the present invention
Technical scheme modify or equivalent, without departure from the spirit and scope of technical solution of the present invention, it is equal
Should contain in the middle of scope of the presently claimed invention.
Claims (6)
1. an atmosphere vapour microwave sounding spectral analysis system, including be sequentially connected in series: antenna and power feeding module, connect
Receipts machine module, data acquisition module, spectra calculation module, integral mean module and main control computer；
Described antenna and power feeding module are used for detecting and receive 22.235GHz ± 0.25GHz microwave section atmosphere vapour and absorb
The radiation brightness signal of line spectrum and window frequency；Including antenna and feed element；
Described receiver module is for being divided generation two-stage local oscillator, one-level local oscillator by same temperature compensating crystal oscillator after power splitter
17.548GHz, two grades of local oscillators 4.387GHz, it is achieved the detectable signal exporting antenna and power feeding module carries out two-stage
Down coversion；Wherein produce after a down coversion intermediate-freuqncy signal is amplified, carry out 90 degree of merits after Filtering Processing divides, will
Detectable signal is divided into two-way Quadrature analog signal；
Described data acquisition module is orthogonal for the two-way Quadrature analog signal that receiver module exports is converted into two-way
Digital signal, and produce the clock signal of required frequency；Including: data acquisition chip and clock generation chip；
Described spectra calculation module, for carrying out quick Fu to data acquisition module output two-way quadrature digital signal
In leaf transformation, it is achieved the conversion from time domain to frequency domain, and by two-way quadrature signal amplitude spectrum square after be added produce merit
Rate is composed；
Described integral mean module is for realizing integral mean to the single frames amplitude spectrum continuously generated；
Described main control computer for calculating the radiation brightness of atmosphere vapour according to amplitude spectrum, thus is finally inversed by air
Humidity, water vapor profile.
Atmosphere vapour microwave sounding spectral analysis system the most according to claim 1, it is characterised in that described system
System also includes being sequentially connected in series: self-correction module, microprocessor module and bus communication module；Wherein said bus
Communication module is connected with described data acquisition module；
Described self-correction module: center between sampled data and the clock that circuit length difference between plate electrode is not caused
The phase offset of alignment is calibrated, it is ensured that system can correctly be sampled at high data rates；
Described microprocessor module: for providing normal work schedule for whole system, send control instruction；Bag
Include: microprocessor chip；
Described bus communication module: for sending configuration data by serial communication bus to described data acquisition chip,
Make data acquisition chip to microprocessor module transmission bit wide 7 bit, the data of the low-voltage differential of speed 500MSPS
Gathering signal, making clock generation chip transmission frequency is 250MHz low-voltage differential clock signal.
3. according to the atmosphere vapour microwave sounding spectral analysis system described in claim 1-2, it is characterised in that described
Receiver module includes: isolator, first stage amplifier, one-level band filter, one-level frequency mixer, put in first,
Automatic gain control unit, 90 degree of electric bridges, two grades of frequency mixers, put in second, two two grades of band filters and two
Individual two-stage amplifier；
Described isolator is used for preventing receiver module internal signal from revealing；
Described first stage amplifier is amplified for the detectable signal exporting described antenna and power feeding module；
Described one-level band filter is amplified and Out-of-band rejection for the signal exporting described first stage amplifier,
Producing a mid frequency is that 22.235GHz carries a width of 500MHz radiofrequency signal；
Described one-level frequency mixer has been used for the radiofrequency signal of described one-level band filter output to one-level intermediate-freuqncy signal
Frequency downconverted process；
Put in described first and be amplified and Out-of-band rejection for the signal that described one-level frequency mixer is exported, produce one
Individual mid frequency is the 4.687GHz one-level intermediate-freuqncy signal with a width of 500MHz；
Described automatic gain control unit, for the system gain of regulated reciver module, makes the output of receiver module
Voltage is maintained in constant level；
Described 90 degree of electric bridges divide for the one-level intermediate-freuqncy signal putting output in described first is carried out merit, and output two-way is just
Hand over analogue signal；
Described two grades of frequency mixers are used for the two-way analogue orthogonal signal to described 90 degree of electric bridges output through carrying out one-level intermediate frequency
Signal processes to the frequency downconverted of two grades of intermediate-freuqncy signals；
Put for two-way analogue orthogonal signal is directly exported in described second, as the application of total power radiometer；
Said two band filter and two two-stage amplifiers are respectively used to two-way analogue orthogonal signal
Reason, producing two-way mid frequency is 0.3GHz, and bandwidth is two grades of intermediate-freuqncy signals of 500MHz.
4. according to the atmosphere vapour microwave sounding spectral analysis system described in claim 1-2, it is characterised in that described
Spectra calculation module includes: two 16k-fast Fourier transform butterfly computation engines, two multipliers and one
Adder；
Described 16k-fast Fourier transform butterfly computation engine has independent storage organization, is used for storing data acquisition
The input data of module and butterfly computation intermediate object program；Operating frequency is 250MHz, it is achieved once to 2MPoint science
Data carry out fast Fourier transform, and wherein M is positive integer, it is achieved digital signal conversion from time domain to frequency domain,
And possess and carry out fast Fourier transform to when previous frame data simultaneously, the result of output previous frame data, and load
The ability of next frame input data, it is achieved continuous print fast Fourier transform；
The complex frequency domain pair that two 16k-fast Fourier transform butterfly computation engines are exported by said two multiplier respectively
Component is answered to carry out square operation；
The output result of two multipliers is carried out summation operation, the single frames amplitude of output detectable signal by described adder
Spectrum.
Atmosphere vapour microwave sounding spectral analysis system the most according to claim 4, it is characterised in that described long-pending
Averaging module is divided to include: dual-ported memory；The storage depth of described dual-ported memory is 2M, work clock is
250MHz；Two port separate configurations of described dual-ported memory, work alone；One port working is writing shape
State, another port is operated in read states；Under the control of internal state machine, two ports of dual-ported memory are produced
Raw write control signal and read control signal, and produce response write address and read address signal.
Atmosphere vapour microwave sounding spectral analysis system the most according to claim 5, it is characterised in that described double
Port store from read port read in previous frame amplitude spectrum, with after previous frame amplitude spectrum carries out cumulative mean
Inputted in the memorizer of described dual-ported memory under write signal control by write port, its cumulative number correspondence integration
Time, thus two frame amplitude spectrum are realized integral mean, and the amplitude spectrum after output averagely.
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| CN108693528A (en) * | 2018-04-13 | 2018-10-23 | 北博（厦门）智能科技有限公司 | Radar real-time signal processor |
| CN113390901A (en) * | 2021-05-08 | 2021-09-14 | 国家卫星气象中心(国家空间天气监测预警中心) | High vertical resolution 0-4km atmospheric temperature and humidity microwave detector |
| CN115308159A (en) * | 2022-07-29 | 2022-11-08 | 中国科学院紫金山天文台 | Omnidirectional measurement system for atmospheric water vapor radiation time-varying characteristics |
| CN115575957A (en) * | 2022-12-08 | 2023-01-06 | 中国科学院国家空间科学中心 | Millimeter wave atmosphere ozone composition detector |
| CN118132906A (en) * | 2024-04-30 | 2024-06-04 | 中国人民解放军国防科技大学 | Method for jointly inverting cloud rolling micro physical parameters based on terahertz and far infrared frequency bands |
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| CN113390901B (en) * | 2021-05-08 | 2023-09-26 | 国家卫星气象中心(国家空间天气监测预警中心) | High vertical resolution 0-4km atmospheric temperature humidity microwave detector |
| CN115308159A (en) * | 2022-07-29 | 2022-11-08 | 中国科学院紫金山天文台 | Omnidirectional measurement system for atmospheric water vapor radiation time-varying characteristics |
| US11994431B2 (en) | 2022-07-29 | 2024-05-28 | Purple Mountain Observatory, Chinese Academy Of Sciences | Omnidirectional measurement system for time-varying characteristic of atmospheric vapor radiation |
| CN115575957A (en) * | 2022-12-08 | 2023-01-06 | 中国科学院国家空间科学中心 | Millimeter wave atmosphere ozone composition detector |
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