logging in or signing up Digital comunication ssr115 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 617 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: June 21, 2012 This Presentation is Public Favorites: 2 Presentation Description Modulation Technique Comments Posting comment... Premium member Presentation Transcript Digital communication: Digital communication Modulation TechniquePowerPoint Presentation: DIGITAL COMUNICATION PCM DPCM DM ADM ARRAY MARY ASK PSK FSK MARY MARY MARY ASK PSK FSK PULSE MODULATION COHERENT NONCOHERENTPowerPoint Presentation: PCM--> It transmit Information In the form of code words Transmitter -> RECEVIER-> BPF SAMPLER QUNTIZER ENCODER PARALLEL TO SERIAL PULSE GENERATOR PARALLEL TO SERIAL DECODER INTEGRATOR LPFPowerPoint Presentation: Block diagram of DPCM Differential amplifier Sample and hold circuit Quntizer Encoder Parallel To Serial Accumulator Predictor circuitPowerPoint Presentation: Block diagram of DM Analog I/P Sample and hold circuit + - Digital-to-analog Converter (DAC) dc PAM Sampling pulse Up/Down _ Counter U/D Clock 1= up 0= down Delta PCMPowerPoint Presentation: + - Sample and hold circuit O/P D/A converter DSP Block diagram of ADMPowerPoint Presentation: Hierarchy of digital modulation technique. The digital modulation technique classified in two category. Coherent technique Noncoherent technique Coherent technique -> In coherent technique we have to use a phase synchronize carrier to be generated at the receiver to recover the information signal. Coherent technique are complex but yield better performance. Non-Coherent technique -> In this technique no phase synchronize carrier is needed at the receiver. It is less complexPowerPoint Presentation: Block diagram of coherent ASK transmitter Block diagram of non coherent ASK transmitter S Integrator Sample and hold circuit + - Sin2∏FCT Bit synchronous Reference voltage Decision box Encoder BPF Regenerator O/PPowerPoint Presentation: BPF Balance modulator Level converter Coherent carrier recover BNRZ Product modulator Carrier generator ῀ PSR O/P Block diagram of PSK transmitter Block diagram of PSK receiver PowerPoint Presentation: + Delay BNRZ Product modulator ῀ O/P Block diagram of DPSK TransmitterPowerPoint Presentation: BPF Delay Integrator Decision box O/P DPSK + NOISE Block diagram of DPSK receiverPowerPoint Presentation: BNRZ MUX ADDER √RS cos ω ct √RS cos ω ct V qpsk Block diagram of QPSK TransmitterPowerPoint Presentation: Block diagram of QPSK Receiver Raise I/P To 4 th power BPF Frequency Divider circuit ÷4 Integrator Integrator LatchPowerPoint Presentation: Block diagram of BFSK Transmitter Product modulator Product modulator ADDER V bfsk PL (t) PH (t) ῀ ῀ √2RS cos ω ct √2RS cos ω ctPowerPoint Presentation: Block diagram of BFSK Receiver Integrator Integrator ADDER Decision box ῀ √2RS cos ω ct ῀ √2RS cos ω ct FSK O/P You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.