FREQUENCY MODULATION

FREQUENCY MODULATION

FREQUENCY MODULATION

... FREQUENCY MODULATION Page 10 Figure 4 A (n) Recovered signal Figure 4 A (o) Input signal Page 11 The output is read from the frequency counter. By varying the frequency, ... order β = 2πk o A / ω m = k o A / f m = modulation index k o = frequency deviation constant 1. for β = .5, 2, and 2, sketch the positive frequency domain representatio...

Ngày tải lên: 19/10/2013, 17:15

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Nghiên cứucông nghệ ADSL sử dụng phương thức điều chế DTM ( Discrete MultiTone Modulation ).

Nghiên cứucông nghệ ADSL sử dụng phương thức điều chế DTM ( Discrete MultiTone Modulation ).

... công nghệ này và đặc biệt là công nghệ ADSL sử dụng phơng thức điều chế DTM ( Discrete MultiTone Modulation ). Đồ án này bao gồm 5 chơng : Chơng 1 : Giới thiệu về công nghệ xDSL Chơng 2 : Các ... chia theo tần số Đối với những hệ thống thực hiện song công ghép kênh phân chia tần số FDD ( Frequency Division Duplex ) thì quá trình thu và phát ở nằm ở 2 dải tần số khác nhau : Thuê bao ... Đi...

Ngày tải lên: 26/04/2013, 08:36

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AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS

AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS

... BPSK Modulation 81 4.3 The OFDM systems performance based on QPSK Modulation 83 4.4 The OFDM systems performance based on DBPSK Modulation 85 4.5 The OFDM systems performance based on DQPSK Modulation ... European Telecommunication Standard Institute f c frequency carrier FDM Frequency Division Multiplexing FDMA Frequency Division Multiple Access Fd Doppler Frequency FEC Forwa...

Ngày tải lên: 26/05/2013, 21:28

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Adverbs Of Frequency

Adverbs Of Frequency

... ADVERBS OF FREQUENCY (UNIT 2 – ENGLISH 10) 1. An adverb of frequency usually goes in mid position. - The bus doesn't usually stop ... open these packets. - It's always cold up here. I often get up in the night. Some adverbs of frequency are always; normally, generally, usually; often, frequently; sometimes, occasionally; ... seldom and rarely with inversion. 3. We can also use...

Ngày tải lên: 27/06/2013, 11:46

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Frequency of Routine and Flooding-stage Observations for Precise Annual Total Pollutant Loads and their Estimating Method in the Yodo River

Frequency of Routine and Flooding-stage Observations for Precise Annual Total Pollutant Loads and their Estimating Method in the Yodo River

... paid special consideration to the frequency of our routine observation and the transverse distribution of water quality in broad area of flow (about 240 m). The frequency of our observations (once ... and non-point pollutant loads in Kyoto City and its adjacent cities discharge into the river. The frequency of our routine observation (once every three days) during the period from late A...

Ngày tải lên: 05/09/2013, 09:38

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Điều biên (Amplitude modulation)

Điều biên (Amplitude modulation)

... D 1uF 1k + 10V D 1uF 1k + 10V ĐIỀU BIÊN (AM: Amplitude modulation) I. Phổ của tín hiệu điều biên: Điều biên là quá trình làm cho biên độ tải tin biến đổi

Ngày tải lên: 29/09/2013, 14:20

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Frequency-Domain Analysis

Frequency-Domain Analysis

... 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 ... Nyquist frequency is 10 kHz, but the Nyquist rate is still 6.8 kHz. We will define half the sampling frequency as the Nyquist frequency throughout this book. Some authors define t...

Ngày tải lên: 29/09/2013, 21:20

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