1PROJECT - first review

Slide 1: 

MOTTO OF THE PROJECT FSK & PSK DEMODULATOR DESIGN USING MATLAB

Slide 2: 

COMMUNICATION

Slide 3: 

BLOCK DIAGRAM OF COMMUNICATION SYSTEM

Slide 4: 

TECHNICAL TASKS IN COMMUNICATION SYSTEM ANALYSIS: TO ANALYSE THE COMMUNICATION SYSTEM AS INTERCONNECTION BETWEEN VARIOUS SUBSYSTEMS WHERE EACH SUBSYSTEM PERFORMS SPECIFIC SIGNAL PROCESSING TASK AND EVALUATING PERFORMANCE OF THE SYSTEM. DESIGN : TO TAKE DECISION FOR A PARTICULAR TYPE OF COMMUNICATION SYSTEM FOR A GIVEN APPLICATION AND ARRIVING AT THE DETAILS OF THE SYSTEM TO PERFORM A GIVEN TASK SATISFACTORILY.

PART - A ANALYSIS OF THE COMMUNICATION SYSTEM : 

PART - A ANALYSIS OF THE COMMUNICATION SYSTEM

Slide 6: 

TYPES OF COMMUNCATION SYSTEMS ANALOG DIGITAL

Slide 7: 

DIGITAL COMMUNICATION SYSTEM

Slide 8: 

TYPES OF SIGNAL OPERATIONS AMPLIFICATION RECTIFICATION MODULATION

WHY MODULATION ? : 

WHY MODULATION ? DEFINITION ADVANTAGES TYPES OF MODULATION

CLASSIFICATION OF MODULATION TECHNIQUES : 

CLASSIFICATION OF MODULATION TECHNIQUES TYPES OF MODULATION CONTINUOUS WAVE MODULATION PULSE MODULATION AMPLITUDE ANGLE DIGITAL ANALOG FREQUENCY PHASE PULSE CODE MODULATION PAM PDM PPM ASK FSK PSK

WHY DIGITAL ? : 

WHY DIGITAL ? INTRODUCTION ADVANTAGES DISADVANTAGES

Slide 12: 

DIGITAL MODULATION SCHEMES ASK FSK PSK

Slide 13: 

AMPLITUDE SHIFT KEYING (ASK) The simplest form of bandpass data modulation is Amplitude Shift Keying (ASK). Here, the symbols are represented as various discrete amplitudes of a fixed frequency carrier oscillator. In binary ASK, where only two symbol states are needed, the carrier is simply turned on or off, and the process is sometimes referred to as ON-OFF Keying (OOK). If more than two symbol states are used, then an M-ary ASK process is adopted, an example being the 8-ASK format shown here.

Slide 14: 

Frequency Shift Keying (FSK) Frequency Shift Keying (FSK) has until recent years been the most widely used form of digital modulation, being simple both to generate and to detect, and also being insensitive to amplitude fluctuations in the channel. FSK conveys the data using distinct carrier frequencies to represent symbol states. An important property of FSK is that the amplitude of the modulated wave is constant.

Slide 15: 

Phase Shift Keying (PSK) With Phase Shift Keying (PSK), the information is contained in the instantaneous phase of the modulated carrier. Usually this phase is imposed and measured with respect to a fixed carrier of known phase – coherent PSK FIG 1 & FIG 2. For binary PSK, phase states of 0o and 180o are used. It is also possible to transmit data encoded as the phase change (phase difference) between consecutive symbols. This method is classified as  Differentially Coherent PSK (DSPK) FIG-3.There is no non-coherent detection equivalent for PSK.

DEMODULATION OF SIGNALS : 

DEMODULATION OF SIGNALS INTRODUCTION TECHNIQUES

DEMODULATION TECHNIQUES : 

DEMODULATION TECHNIQUES COHERENT NON - COHERENT

COHERENT DEMODULATION : 

COHERENT DEMODULATION

NON-COHERENT DEMODULATION : 

NON-COHERENT DEMODULATION

DEMODULATION OF FSK SIGNAL : 

DEMODULATION OF FSK SIGNAL COHERENT DETECTION NON-COHERENT DETECTION

COHERENT DETECTION OF FSK : 

COHERENT DETECTION OF FSK CARRIER SYNCHRONIZATION SYMBOL SYNCHRONIZATION

NON-COHERENT DETECTION OF FSK SIGNAL : 

NON-COHERENT DETECTION OF FSK SIGNAL CARRIER SYNCHRONIZATION SYMBOL SYNCHRONIZATION

DEMODULATION OF PSK SIGNAL : 

DEMODULATION OF PSK SIGNAL COHERENT DETECTION OF THE PSK SIGNAL FROM THE SOURCE

CARRIER SYNCHRONIZATION : 

CARRIER SYNCHRONIZATION SQUARING LOOP COSTAS LOOP

COSTAS LOOP : 

COSTAS LOOP

SQUARING LOOP : 

SQUARING LOOP