聲光頻譜分析器的信號(hào)處理
THE DATA PROCESSING TECHNIQUE OF THE IOAOSA
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摘要: 集成光學(xué)聲光頻譜分析器是由半導(dǎo)體激光器、導(dǎo)波聲光調(diào)制器、波導(dǎo)短程透鏡和CCD探測(cè)器陣列所構(gòu)成。CCD探測(cè)器把接收的光信號(hào)轉(zhuǎn)換成電信號(hào),再由TMS32010系統(tǒng)與IBM-PC機(jī)組成的主從工作機(jī)的信號(hào)處理中心進(jìn)行處理。微機(jī)系統(tǒng)中的CPU采用TMS-32010。CCD視頻信號(hào)采集用循環(huán)間隔采樣方式。此樣機(jī)達(dá)到的指標(biāo):系統(tǒng)帶寬為100MHz,分辨率為8MHz,動(dòng)態(tài)范圍為20dB。
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關(guān)鍵詞:
- 信號(hào)處理; 聲光頻譜分析器; CCD探測(cè)器陣列
Abstract: An IOAOSA (Integrated Optical Acoustooptic Spectrum Analyzer) system consists of semiconductor laser, acoustooptic modulator, geodesic lenses, and CCD detector array. The optical signal is converted to electrical signal by CCD array of the IOAOSA processor, and then the signal is processed by the signal processing center which consists of TMS32010 system and IBM-PC. The TMS32010 is used in the microcomputer system. It has very high speed. A cyclic sample method is used to collect the data of the CCD video signal, sampling one point every 40 points. After processing, the frequency bandwidth. the resolution and the dynamic range of the system are measured to be 100MHz, 8MHz and 20dB respectively. -
M. K. Barnoski, Bor-Uei Chen et al., IEEE Trans. on CAS, CAS-26(1979) 12, 1113-1124.[2]J. W.顧德門(mén), Fourier光學(xué)導(dǎo)論,科學(xué)出版社,北京,1979年,第五章,第二節(jié).[3]中國(guó)科學(xué)院聲學(xué)所中國(guó)軟件技術(shù)開(kāi)發(fā)部, TMS32010 數(shù)字信號(hào)處理器軟件和硬件開(kāi)發(fā)技術(shù),1987年5月. -
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