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Modulation Techniques & Digital Communication


Definition and Applications of Modulation

  1. Why do we require modulation?
  2. Why we should add carrier signal to modulated wave to generate modulated wave?
  3. Why can't we use digital signal as carrier for wireless communication?
  4. What are the Synchronous and Asynchronous Demodulation Processes?
  5. Advantages of digital modulation techniques
  6. Modulation Index, Bandwidth, and Transmission Power
  7. What is Baseband Modulation?
  8. What is PassBand Modulation?
  9. Differences Between Baseband and Passband Modulation Techniques
  10. High and Low Level Modulation
  11. More ...

Analog Modulation Schemes

  1. Amplitude (AM), Frequency (FM), and Phase (PM) Modulation Techniques
  2. Modulation Indices for AM, FM, and PM
  3. FM Bandwidth and FM Band 
  4. Envelope of AM Signal 
  5. Double Side-band (DSB) and Single Side-band Suppressed Carrier (SSB-SC) Modulation Techniques
  6. Vestigial Sideband Modulation (VSB) 
  7. Superheterodyne Receiver 

Digital Modulation Schemes

  1. Baseband Modulation Techniques
  2. Passband Modulation Techniques
  3. Differences between Baseband and Passband Modulation Techniques

ASK, FSK, and PSK Modulations, MATLAB Codes, and Constellation Diagrams

  1. Comparisons among ASK, FSK, and PSK
  2. ASK FSK PSK with Simulation
  3. MATLAB Code for ASK, FSK, and PSK
  4. Constellation Diagram of ASK, PSK, and FSK
  5. Passband Binary ASK, FSK, and PSK 

M-ary QAM and PSK, MATLAB Codes, and Constellation Diagrams

  1. M-ary Modulation | QPSK & QAM | Constellation
  2. BER vs SNR for QAM, QPSK ...
  3. MATLAB Code for QPSK
  4. MATLAB Code for QAM
  5. MATLAB Code for BER vs SNR for Various Modulation Techniques

Minimum Shift Keying (MSK) and Gaussian Minimum Shift Keying (GMSK)

  1. Minimum Shift Keying (MSK)
  2. Similarities Between MSK and FSK
  3. Gaussian Minimum Shift Keying (GMSK)
  4. Similarities Between GMSK and MSK

OFDM & Others

  1. OFDM for 4G & 5G
  2. OFDM in MATLAB

Orthogonal Time Frequency Space (OTFS)

Modulation in Telecommunication

  1. Importance of Modem in Telecommunication
  2. FDM, TDM, & CDMA
  3. CDMA in Details
  4. Difference Between Modem and Router

ML and MAP Decoding Fundamentals

  1. ML and MAP Decoding Fundamentals

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Online Simulator for ASK, FSK, and PSK

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Constellation Diagrams of ASK, PSK, and FSK

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Power Spectral Density Calculation Using FFT in MATLAB

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FFT Magnitude and Phase Spectrum using MATLAB

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Coherence Bandwidth and Coherence Time

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MATLAB Code for Rms Delay Spread

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MATLAB Code for ASK, FSK, and PSK

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BER vs SNR for M-ary QAM, M-ary PSK, QPSK, BPSK, ...

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