orthogonal frequency division multiplexing

Ngày tải lên: 26/05/2013, 21:28

Ngày tải lên: 22/06/2014, 22:20

... Coarse Wavelength Division Multiplexing (CWDM) Generate More Revenue with Less Fiber Here's How it Works In simple ... MDU/ BUSINESS Satellite Uplink F i b e r L i n e W a v e l e n g t h s The CWDM Advantage ADC Coarse Wave Division Multiplexing (CWDM) Solutions, part of the ADC’s Value-Added Module (VAM) family, add flexibility...

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Ngày tải lên: 21/06/2014, 17:20

... coding • Frequency Shift Keying (FSK) – Binary modulation technique that changes the frequency of the carrier signal – More wave cycles are needed to represent a 1 bit 24 Frequency (continued) 26 Frequency ... (continued) 14 Infrared Light (continued) 25 Frequency (continued) • A change in voltage does not create a change in frequency • The term Hertz (Hz) is used to measure frequency – A Kilohertz (KHz) is 1,000 ... (AM) – Used by broadcast radio stations – Very susceptible to interference from outside sources • Frequency modulation (FM) – Number of waves that occur in one second change • Based on the amplitude...

Ngày tải lên: 13/09/2012, 10:52

... TDM TDM Ghép kênh - Multiplexing Multiplexing Frequency- Division Multiplexing (FDM) Time -Division Multiplexing (TDM) Synchronous Asynchronous Dữ liệu hỗn hợp  DS-1 ... theo cho thuê bao. Các bytes đầu của SONET STS-1 Wavelength Division Multiplexing TDM FDM Ghép kênhtheo tần số Frequency Division Multiplexing (FDM)  FDM  Phương pháp này chỉ hiện thực được ... (tiếp) Dense Wavelength Division Multiplexing  DWDM  Chưa có định nghĩa chính thức (chưa chuẩn hóa)  Các kênh sít nhau hơn WDM  200GHz FDM của 3 kênh thoại (tiếp) Wavelength Division Multiplexing  WDM...

Ngày tải lên: 13/09/2012, 11:16

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Ngày tải lên: 05/09/2013, 09:38

Ngày tải lên: 29/09/2013, 20:20

... function of the normalized frequency ω. Therefore the range [0 π ] corresponds to the actual frequency range [0 ω s /2] and the normalized frequency π corresponds to the Nyquist frequency (and 2π corresponds ... book. 150 FREQUENCY- DOMAIN ANALYSIS xlabel(’Normalized frequency ) subplot(1,2,2) plot(w,HdB);grid title(’Magnitude in dB of the frequency response’) ylabel(’Magnitude in dB’) xlabel(’Normalized frequency ) figure(2) subplot(1,2,1) plot(w,ph);grid title(’Phase ... can say that the frequency of 4100 Hz is folded into 3900 Hz, and 4000 Hz is hence called the “folding frequency. ” In general, half the sampling frequency is known as the folding frequency (expressed...

Ngày tải lên: 29/09/2013, 21:20

... Page 2 Purpose: The objectives of this laboratory are: 1. To investigate frequency modulation characteristics in the frequency domain. 2. To implement a classical double-tuned FM demodulator ... Matlab and Simulink Page 3 Frequency Modulation FM results when the time derivative of the phase of the carrier is varied linearly with the message signal m(t). The frequency deviation is proportional ... VCO Conversion Constant, Ko An external voltage may control the output frequency of the VCO. The change in the output frequency per change in the dc input voltage was measured. K o = Δf /...

Ngày tải lên: 19/10/2013, 17:15

... microelectronics counterpart. Resonant frequency measurements are one of those with no microelectronics counterpart. Several techniques are available to measure resonant frequency. These techniques range ... The resonant frequency result from one of the TRAs is shown in Figure 15. The blur-envelope measurements for the TRAs shown in Table 5 exhibit a larger possible range for the resonant frequency. ... order to determine the resonant frequency. The parameters are iterated until the sum of the errors is minimized. The resulting model fit yields the calculated resonant frequency and a damping coefficient. E XPERIMENTAL...

Ngày tải lên: 23/10/2013, 16:15

... time-domain signal x(n) 158 FREQUENCY ANALYSIS 4 Frequency Analysis Frequency analysis of any given signal involves the transformation of a time-domain signal into its frequency components. The ... amplitude gain at frequency ! 0 and f! 0  is the phase shift of the system at frequency ! 0 . Therefore it is clear that the sinusoidal steady-state response has the same frequency as the input,but ... N. The single period with frequency index k  0,1, FFF, N À 1 corresponds to the frequency range 0 f f s or 0 F 1. Similar to the case of analog aperiodic signals,the frequency analysis of discrete-time aperiodic...

Ngày tải lên: 23/10/2013, 22:15

... relationship between the domestic division of labor and classes. This has not happened. While there are historical and qualitative case studies which examine the domestic division of labor and a few ... and the gender division of labor in the household. The basic objective of this chapter, then, is to explore empirically the relationship between class and the gendered domestic division of labor. More ... Instead of asking how the gender division of labor within families varies across locations within a class structure, the focus of analysis would be on how the gender division of labor varies across different...

Ngày tải lên: 01/11/2013, 07:20

... progress 5 make a bad start to a relationship 104 English Collocations in Use 46 61 Number and frequency Commenting on how much or how many These adjectives collocate strongly with both number ... drop or decline as well as fall. We also talk about a unit of electricity, unit of length. Frequency Widespread [existing or happening in many places or among peoplej collocates strongly...

Ngày tải lên: 01/11/2013, 11:20