(caps)Communication Systems is one of the most important and high-scoring subjects in the GATE ECE syllabus. It forms the foundation of modern wireless networks, broadcasting systems, and digital transmission technologies.
Communication Notes Gate 2026
(toc)Table of Contents
The following topics are covered in the Syllabus. It starts with the syllabus includes
Fundamentals
- Signals and Systems Fundamentals
- CTFT
- CTFS
- Sampling theorem
Chapter 1: Analog Communication (3M)
- Standard AM
- DSB-SC
- SSB-SC
- Frequency Division Multiplexing
- Frequency Modulation
- Phase Modulation
Chapter 2: Random Variables
- Single Random Variable
- Joint Random Variable
- Standard Distribution
- Random Distribution
- Response of LTI Systems to Random Processes
Chapter 3: Digital Communication (4M)
BaseBand Data Transmission
- Pulse Code Modulation (PCM)
- PCM + TDM
- DPCM
- Delta Modulation
- Intersymbol Interference (ISI)
Bandpass Data Transmission
- Binary Schemes
- B-ASK, B-FSK, B-PSK
- M-ASK, M-QAM
- Probability of Error Calculation
- Optimum Threshold
- Matched Filter Rx
- Correlation Rx
Chapter 4: Information Theory and Coding (2M)
- Information (I)
- Entropy (H)
- Channel Coding
- Channel Capacity
- Linear Block Codes
- Different types of Channels
- Cyclic Redundance Check (CRC)
Books:
1. Communication Systems By - Simon Hawkin
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Conclusion
Communication Systems form the backbone of modern engineering, connecting theory with real-world applications. For GATE 2026, mastering this subject requires a clear understanding of core concepts, strong mathematical foundations, and consistent practice of previous year questions. By focusing on signal behavior, noise analysis, modulation techniques, and system performance, aspirants can build both conceptual clarity and problem-solving confidence. With disciplined revision and smart practice, Communication becomes not just a scoring subject but a strong pillar in your GATE preparation journey.
