為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式，在分析四相相對移相（QDPSK)信號調(diào)制解調(diào)原理的基礎(chǔ)上，設(shè)計(jì)了一種QDPSK調(diào)制解調(diào)電路，它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺上，進(jìn)行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中，測試結(jié)果表明，調(diào)制電路能正確選相，解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致，達(dá)到了預(yù)期的設(shè)計(jì)要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test Result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
標(biāo)簽： QDPSK CPLD 調(diào)制解調(diào) 電路設(shè)計(jì)
上傳時(shí)間： 2013-10-28
上傳用戶：jyycc
The revolution of automation on factory floors is a key driver for the seemingly insatiable demand for higher productivity， lower total cost of ownership，and high safety. As a Result， industrial applications drive an insatiable demand of higher data bandwidth and higher system-level performance. This white paper describes the trends and challenges seen by designers and how FPGAs enable solutions to meet their stringent design goals.
標(biāo)簽： xilinx FPGAs 工業(yè) 中的應(yīng)用
上傳時(shí)間： 2013-11-08
上傳用戶：yan2267246
基于通用集成運(yùn)算放大器，利用MASON公式設(shè)計(jì)了一個(gè)多功能二階通用濾波器，能同時(shí)或分別實(shí)現(xiàn)低通、高通和帶通濾波，也能設(shè)計(jì)成一個(gè)正交振蕩器。電路的極點(diǎn)頻率和品質(zhì)因數(shù)能夠獨(dú)立、精確地調(diào)節(jié)。電路使用4個(gè)集成運(yùn)放、2個(gè)電容和11個(gè)電阻，所有集成運(yùn)放的反相端虛地。利用計(jì)算機(jī)仿真電路的通用濾波功能、極點(diǎn)頻率和品質(zhì)因數(shù)的獨(dú)立控制和正交正弦振蕩，從而證明該濾波器正確有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the Result shows that the presented circuit is valid and effective.
標(biāo)簽： MASON 多功能 二階 濾波器設(shè)計(jì)
上傳時(shí)間： 2013-10-09
上傳用戶：13788529953
編程查找指定目錄下所有EXE文件，并將其全路徑存入Result.txt中，要求用遞歸
上傳時(shí)間： 2014-01-11
上傳用戶：1051290259
A Waiter relays an order Object to a Producer, waits in an independent thread during the production, and then delivers the Result using a Consumer callback method.
標(biāo)簽： independent production Producer Waiter
上傳時(shí)間： 2015-02-10
上傳用戶：lepoke
首先，打開圖像（256色）；再次，進(jìn)行歸一化處理，點(diǎn)擊“一次性處理”；最后，點(diǎn)擊“R”或者使用菜單找到相應(yīng)項(xiàng)來進(jìn)行識別。識別的結(jié)果顯示在屏幕上，同時(shí)也輸出到文件Result.txt中。
標(biāo)簽：
上傳時(shí)間： 2013-12-23
上傳用戶：851197153
This example program shows how to configure and use the A/D Converter of the following microcontroller: STMicroelectronics ST10F166 After configuring the A/D, the program reads the A/D Result and outputs the converted value using the serial port. To run this program... Build the project (Project Menu, Build Target) Start the debugger (Debug Menu, Start/Stop Debug Session) View the Serial Window (View Menu, Serial Window #1) View the A/D converter peripheral (Peripheral Menu, A/D Converter) Run the program (Debug Menu, Go) A debug script (debug.ini) creates buttons that set different analog values in A/D channels. As the program runs, you will see the A/D input and output change. Other buttons create signals that generate sine wave or sawtooth patterns as analog inputs. µ Vision3 users may enable the built-in Logic Analyzer to view, measure and compare these input signals graphically.
標(biāo)簽： microcontroll Converter configure following
上傳時(shí)間： 2014-12-01
上傳用戶：獨(dú)孤求源
VHDL 關(guān)于2DFFT設(shè)計(jì)程序 u scinode1 ∼ scinode9.vhd: Every SCI node RTL vhdl code. The details can be seen in the following section. u 2dfft.vhd: The top module includes these scinodes and form a 3x3 SCI Torus network, and it support these sub-modules scinode1∼ scinode9 reset and clk and global_cnt signals to synchronous the sub-modules to simplify the overall design. u proj2.wfc: VSS simulation Result that is the same as the ModelSim simulation Result. u Pro2_2.wfc: VSS simulation Result of another test pattern can’t cause overflow situation.
標(biāo)簽： scinode1 scinode details 2DFFT
上傳時(shí)間： 2014-12-02
上傳用戶：15071087253
AVL Tree implementation: I also included a test function to compare the AVL Tree performance with STL Set and Map. Compile the source mavltree.cpp and run it to see the Result!
標(biāo)簽： Tree implementation performance AVL
上傳時(shí)間： 2013-12-19
上傳用戶：3到15
A method is presented for augmenting an extended Kalman filter with an adaptive element. The Resulting estimator provides robustness to parameter uncertainty and unmodeled dynamics.
標(biāo)簽： augmenting presented adaptive extended
上傳時(shí)間： 2014-01-05
上傳用戶：qq1604324866
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