coders decoders and pulse code modulation

PULSE CODE MODULATION

Ngày tải lên : 27/10/2013, 22:15

... paramters of the quantizer encode and the decode blocks The triger signal is provided using a pulse generator figure 8A (f) Block Parameters Enabled quantizer encode Similarly the block parameters ... switches are to be implemented using the Sample and hold and Quantizer blocks The outputs is to be fed via a MUX and the input compared with the output and the error in tracing the signal is observed ... Matlab and Simulink Laboratory Procedure I PCM Familiarization A The analog to digital conversion properties of the PCM was investigated in the last experiment The “start” bit and the data bits and...

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biến điệu mã xung pcm ( pulse code modulation )

Ngày tải lên : 31/12/2015, 16:35

... pcm ( pulse code modulation ) Hình 7.17:PCM Mộtxung dương biểu diễn cho bit xung Zero biểu diễn bit Hoàn điệu BCM đơn giản DAC Khối biến điệu hoàn điệu thường IC LSI gọi tên CODEC ( coder decoder ... biến điệu mã xung - pcm ( pulse code modulation ) Sự lượng tử hoá làm tròn mức dùng làm bậc thang giống tín hiệu mong muốn Số mức...

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Space vector pulse width modulation for multilevel inverters and solution to modulation dependent problems

Ngày tải lên : 14/09/2015, 08:37

... ﬂuxes ψg and ψc φ Power factor angle xxvi List of Abbreviations DSP Digital Signal Processor PWM Pulse Width Modulation SPWM Sin Triangle Pulse Width Modulation SVPWM Space Vector Pulse Width Modulation ... gratitude and thanks to A/P R Oruganti and A/P S K Panda who have been my module lecturers, lab supervisors and qualifying examiners I would also like to thank Mr Y C Woo, and Mr M Chandra of ... ∆ψcα , ∆ψcβ and |∆ψc | at vc =1.0 p.u and δ=45o 171 5.32 Output voltage, ∆ψc and ia for vc =1.0 p.u and δ=45o 171 5.33 Inverter line voltage vcl , grid voltage vgl , |∆ψc | and |∆ψc |/|∆ψc(max)...

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Organizing, Annotating, and Quoting Code

Ngày tải lên : 05/10/2013, 10:20

... sparingly and with great caution, because it can quickly make code difficult to understand and maintain In F# optional compilation is supported by the compiler switch define FLAG and the command #if ... NET 1.0, 1.1, and 2.0 and covers compiler options Comments F# provides two kinds of comments Multiline comments start with a left parenthesis and an asterisk and end with an asterisk and a right ... CHAPTER I ORGANIZING, ANNOTATING, AND QUOTING CODE module definition, you can nest submodules The following code defines three submodules, FirstModule, SecondModule, and ThirdModule ThirdModule is...

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Tài liệu Security and Unmanaged Code pdf

Ngày tải lên : 21/12/2013, 19:15

... Chapter 8: Web Services and Server Components Development with Visual Basic NET / Lind / 222653-6 / Chapter Security and Unmanaged Code that the code is running under, and the identity encapsulates ... Services and Server Components Development with Visual Basic NET / Lind / 222653-6 / Chapter Security and Unmanaged Code provides Data Encryption Standard (DES) support The following code segment ... native code for the platform, and they execute in their own unmanaged process spaces In order to effect communication between the managed code in your XML web service and the unmanaged code in...

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Tài liệu Debugging C and C++ code in a Unix environment ppt

Ngày tải lên : 21/01/2014, 06:20

... interested in it Chapter Aspects of debugging C and C++ code Debugging C and C++ code entails noticing, localising, understanding and repairing bugs Noticing and localising a bug You might think that ... Explicit storage allocation and deallocation In C and C++, you have to explicitly allocate and deallocate dynamic storage through malloc and free (for C) and through new and delete (for C++) If memory ... problems this way Code grinding (code walk through) A similar technique to ANWB debugging is to print your code, leave your terminal, and go to the cafetaria and some serious caffeine and sugar intake...

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Business Conduct and Ethics Code pot

Ngày tải lên : 15/03/2014, 21:20

... dignity and respect and promote diversity in the workplace •• Understanding and obeying local laws and acting consistently with Chevron’s policies and procedures •• Security: We protect personnel and ... expectations — our own and those of others We drive for results with energy and a sense of urgency About the Business Conduct and Ethics Code The Code helps us understand how Chevron’s values ... for respecting all applicable laws and following the policies in our Code Authority In addition to knowing and understanding this Code, each of us must understand the level of authority included...

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Báo cáo hóa học: " Research Article Pulse Interval Modulation for Ultra-High Speed IR-UWB Communications Systems" pdf

Ngày tải lên : 21/06/2014, 08:20

... 2008 [9] C J Mitchell, G T F de Abreu, and R Kohno, “Combined pulse shape and pulse position modulation for high data rate transmissions in ultra-wideband communications,” International Journal ... obtained using an SOOC [15] deﬁned by (n, w, λa , λc ), where n is code length, w is code weight, and λa and λc are unity auto- and cross-correlation constraints, respectively The overall transmitted ... between source bits and transmitted chips for 4-PPM and 4-PIM (Example) ⎛ Eg p⎣t − Tc ⎝2m + m=0 m−1 ⎞⎤ Sl ⎠⎦, (1) l=−∞ where Eg is energy of the pulse, Tc is chip duration, p(t) is the pulse shape function...

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Báo cáo hóa học: " Research Article Towards Preserving Model Coverage and Structural Code Coverage" doc

Ngày tải lên : 21/06/2014, 20:20

... introduced formalism whether a code transformation disrupts structural code coverage We use a small sample code and show how a concrete code transformation changes the code We use a compact scheme ... structural code coverage and to preserve structural code coverage Program P Denotes the program before (P1 ) and after (P2 ) the transformations for which we want to preserve structural code coverage ... available code transformations are allowed but a warning is emitted if structural code coverage may be compromised by an applied code optimization Issues of preserving model coverage by code generators...

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Báo cáo hóa học: " Differential Amplitude Pulse-Position Modulation for Indoor Wireless Optical Communications" pot

Ngày tải lên : 23/06/2014, 00:20

... paper, a novel hybrid modulation technique called diﬀerential amplitude pulse- position modulation (DAPPM) is proposed DAPPM is a combination of pulse- amplitude modulation (PAM) and DPPM The performance ... average optical power and bandwidth requirements of OOK, PAM, PPM, DPPM, DH-PIM2 , and DAPPM DAPPM can give better bandwidth and/ or power eﬃciency than PAM, PPM, DPPM, and DH-PIM2 depending on ... a)7 a 12 13 11 (3) (4) DIFFERENTIAL AMPLITUDE PULSE- POSITION MODULATION DAPPM is a combination of PAM and DPPM Therefore the symbol length and pulse amplitude are varied according to the information...

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Algorithms for programmers ideas and source code ppt

Ngày tải lên : 27/06/2014, 08:20

... ideas only very shortly and supply some (hopefully) useful code Sprache will partly go away: using/including the actual code from FXT will be beneﬁcial to both this document and FXT itself The goal ... the codes shall completely go away It leads to duplication of statements, especially with non-pseudo code (running text, description in the environment and comments at the begin of the actual code) ... 8.2) Code 1.7 (radix px DIT FFT) Pseudo code for a radix r:=px decimation in time FFT: procedure fftdit_r(a[], n, is) // complex a[0 n-1] input, result // p (hardcoded) // r == power of p (hardcoded)...

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Pulse amplitude modulation

Ngày tải lên : 15/07/2014, 22:24

... data symbols Introduction • Possible approaches include – Pulse width modulation (PWM) – Pulse position modulation (PPM) – Pulse amplitude modulation (PAM) • We will only be considering PAM in these ... zero crossing See plots for x = RC Pulse Shaping Normalised Spectrum H(f)/T Pulse Shape h(t) x=0 x = 0.5 x=1 f *T t/T RC Pulse Shaping- Example • Pulse shape and received signal, x = (β = 0) - ... the use of random data symbols • For simple channel pulse shapes with binary symbols, the eye diagram may be constructed manually by finding the worst case ‘1’ and worst case ‘0’ and superimposing...

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Báo cáo toán học: " Disconnected vertex sets and equidistant code pairs" pdf

Ngày tải lên : 07/08/2014, 06:20

... equidistant code pairs This bound is not as accurate as Ahlswede’s result, but it is more general and it turns out to be sharp for some values of q, n and δ, and for q → ∞ for any ﬁxed n and δ Disconnected ... ≤ if i ≤ δ and q xi = if i > δ , and let B consist of the words (x1, , xn ) with < xi ≤ q if i ≤ δ and xi = for precisely δ − δ values of i > δ Then A and B form an equidistant code pair at ... x2i for ≤ i ≤ n and xn = if n is odd Take for B the set of words with x2i−1 = x2i for ≤ i ≤ n and xn ﬁxed if n is odd Then A and B are n equidistant code pairs at distance n or n and |A| = |B|...

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Báo cáo y học: " Comparison of ankle-brachial pressure index and pulse wave velocity as markers of cognitive function in a community-dwelling population" potx

Ngày tải lên : 11/08/2014, 16:22

... self-questionnaires and interviews The height and weight of subjects were measured, and body mass index (BMI) was calculated Low-density lipoprotein (LDL) cholesterol, triglyceride and HbA1c were ... analysis SK, SN and NYF contributed to study design and assisted in drafting the manuscript TU and IT completed initial survey construction, recruitment of participants AK, YS, KD and MM participated ... cholesterol, triglyceride and HbA1c were also measured by standard analytical techniques ABI and brachial-ankle PWV measurements The ankle and brachial pressures were measured using the volume-plethymographic...

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Báo cáo y học: "Histamine H4 receptor antagonism diminishes existing airway inflammation and dysfunction via modulation of Th2 cytokines" pot

Ngày tải lên : 12/08/2014, 11:22

... and design of the study and helped draft the manuscript PJD conceived the study, participated in its design and coordination and drafted the manuscript All authors read and approved the final ... conditions and maintained on an OVA-free diet with free access to food and water All experimental animals used in this study were under a protocol approved by the Institutional Animal Care and Use ... (Sigma-Aldrich, St Louis, MO) in PBS and Inject Alum (Pierce, Rockford, IL) mixed 1:1 on day and boosted in the same way on day On day 22, 29, 36, 43, 50, and 57, mice received an intranasal (i.n.)...

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Báo cáo y học: "B cell depletion in diffuse progressive systemic sclerosis: safety, skin score modification and IL-6 modulation in an up to thirty-six months follow-up open-label trial" docx

Ngày tải lên : 12/08/2014, 12:20

... presented a precocious and quicker B cellrecovery at months and (CD19 >4.5%) There were eight women and one man, with a mean (standard deviation (SD))age of 40.9 ± 11.1 years, and a median disease ... statistical analysis, interpreted and analysed data, and drafted the manuscript MDS conceived and designed the study, collected data, interpreted and analysed data, and drafted the manuscript LG ... mid and deeper portion of the dermis in all the involved and uninvolved skin biopsies of patients before and after treatment with antiCD20 Figure illustrates the presence of B cells (a) and T...

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Báo cáo y học: "Equipment review: New techniques for cardiac output measurement – oesophageal Doppler, Fick principle using carbon dioxide, and pulse contour analysis" pot

Ngày tải lên : 12/08/2014, 18:21

... vertical bars indicate mean and standard deviation, respectively (differential pressure pneumotachometer) and a pulse oxymeter VCO2 is calculated from minute ventilation and its carbon dioxide content, ... velocity signals, and probe repositioning is mandatory if reliable results are to be obtained The pulse contour methods also require frequent calibration, and the need for both arterial and central ... the predicted and measured pressure waveforms become very similar [23] Several studies have compared cardiac output as measured using thermodilution and pulse contour [26,29,30], and found fair...

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Báo cáo khoa học: " Expression of cell surface receptors and oxidative metabolism modulation in the clinical continuum of sepsis" ppt

Ngày tải lên : 13/08/2014, 10:20

... authors read and approved the manuscript Acknowledgements The authors thank Leandro Martins and Camila Valentin for their help in the recruitment of patients, and Maria da Luz Fernandes and Maria ... Neutrophil and monocyte ROS generation in septic patients (n = 41) and controls (n = 17) constitutively and after PMA, fMLP, LPS and S aureus stimulation Values are expressed in median and ranges ... constitutively and after PMA, fMLP, LPS and S aureus stimulation (p < 0.001 in all tested conditions) The median GMFI and range values in the patient group and control group at baseline and after...

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nghiên cứu kỹ thuật điều chế độ rộng xung PWM (Pulse Width Modulation) cho bộ nghịch lưu đa bậc ghép tầng (Cascade inverter)

Ngày tải lên : 08/07/2015, 21:27

... Tóm tắt luận văn Luận văn thực nhiệm vụ nghiên cứu kỹ thuật điều chế độ rộng xung - PWM (Pulse Width Modulation) cho nghịch lưu đa bậc ghép tầng (Cascade inverter) Thông qua mô Psim đánh giá ... based PWM) Các nghịch lưu áp thường điều khiển dựa theo kỹ thuật điều chế độ rộng xung – PWM (Pulse Width Modulation) qui tắc kích đóng đối nghịch Qui tắc kích đóng đối nghịch đảm bảo dạng áp tải ... Luận Văn Tốt Nghiệp • GVHD: Ts Nguyễn Văn Nhờ Phương pháp điều chế vector không gian (Space vector modulation, Space vector PWM) • Phương pháp Discontinuous PWM Các dạng cấu trúc nghịch lưu áp đa...

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Rate-Distortion Analysis and Traffic Modelling of Scalable Video Coders

Ngày tải lên : 06/11/2012, 10:45

... Give a detailed R-D analysis and propose novel R-D models for scalable video coders To better understand scalable coders, we examine distortion and bitrate of scalable coders separately, which have ... scalable video coders and propose a novel operational R-D model We evaluate and demonstrate the accuracy of our R-D function in various scalable coders, such as Fine Granular Scalable (FGS) and Progressive ... importance and advantages of scalable coding in video transmission and also describe several popular scalable coders In Chapter III, we give a detailed rate-distortion analysis for scalable coders and...

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