Analog communications

By : Vandana Tanwar

Updated : Feb 5, 2021, 8:29

The concept of Analog communications covers includes transmitting images, data, voice, signal, or videos with a continuous signal that differs in phase, amplitude, and other properties. An analog source signal is transferred using an analog modulation technique, for example, an FM or AM. This article covers an overview of analog communications for GATE ECE such as study materials for GATE ECE, best analog communication books, analog communications GATE questions, and analog communication topics for GATE ECE. This topic, while important for GATE exams, also helps candidates appearing for Engineering Services Examination (ESE), ISRO ECE exam, Postgraduate Entrance Examination (PGEE), SRM Graduate Engineering test (SRMGEET), BITSAT Entrance Exam, and UPES Entrance Exam. Aspirants also need to prepare analog communications for GATE computer science. 

Important Analog Communications Topics for GATE ECE 

The following topics will help you to prepare for the topic and solve analog communications MCQs.




A signal is a source of energy that transfers information from one point to another. Thus, signals help to form communication channels between the sender and the receiver. The types of signals are important to cover under the topic of analog communication, and depending on their characteristics. They are categorized as divided into different types.


Analog signal

An analog signal is a continuous signal that varies over time, as per the quantity’s instantaneous values, which exhibits it. Its time-varying quantity is what makes it continuous.

Digital signal

Digital signals, unlike analog signals, are non-continuous in form and discrete in nature. This signal has separate values represented individually. Previous values do not determine these values because they are derived at a specific moment and, at a particular instant of time.


Periodic signal

It is a signal that replicates its sequence over a period of time. Periodic signals can either be analog or digital. As it has a continuously repeated pattern, it is easy to compute and assume. 

Aperiodic signal

It is a signal that does not repeat its pattern over a period of time. Aperiodic signals can either be analog or digital. The signal’s pattern is continued but not repeated. It is also not that simple to calculate or assume it.


Tips to Solve Analog Communications Questions for GATE ECE

  • Start by covering the basics of communication systems and then move onto analog and digital communications.
  • Go through analog communications GATE notes and analog communications notes for ECE online on BYJU'S Exam Prep.
  • Solve analog communications online communications, online tests, and practice MCQs.
  • Check out the analog communications syllabus for GATE and revise all the important subtopics.

Importance of Analog Communications for GATE

  1. Analog communications can help one learn about tuning, types of capacitors, and diode detectors. 
  2. The GATE exam carries at least 5-9 marks worth of questions based on analog communications.
  3. In the GATE 2020 exam, analog electronics carried 13% weightage while communications carried 10% weightage.
  4. Knowledge of analog communications offers many lots of practical benefits; such as one can learn how to build an amplifier, learn about the role of speaker impedance, the action of the preamp, etc. 

Most Recommended Books for Analog Communications for GATE ECE

Listed below are a few important analog communications books to cover analog communication topics for GATE ECE:



Signals & Systems (Edition 2)

Alan V. Oppenheim, Alan S. Willsky, and S. Hamid Nawab

Principles of Communication Systems (Edition 3)

Goutam Saha, Herbert Taub, and Donald Schilling

Modern Digital and Analog Communication Systems

B.P. Lathi

Why prepare Analog Communications from BYJU'S Exam Prep?

BYJU'S Exam Prep is regarded as one of the best platforms to prepare for all kinds of competitive exams, including GATE, UPSC, and JEE. You will get GATE ECE analog communications  notes covering each topic in detail, practice questions, and online MCQ quizzes. GATE aspirants can rely on BYJU'S Exam Prep for their exam preparation as it provides analog communications GATE questions and answers PDFs with online quizzes for better practice. BYJU'S Exam Prep enables optimum preparation allows one to prepare better as any aspirant can sign up for video courses, live interactive classes, and discussion boards for doubt clearance. Check BYJU'S Exam Prep for analog communications GATE pdf, analog communications GATE syllabus, analog communications MCQs, and analog communications notes for GATE pdf. 


Quest. Besides analog communications, what other topics need to be covered for GATE ECE?

Candidates must also prepare for digital circuits, electromagnetic theory, network theory, and engineering mathematics.

Quest. How much weightage does the topic of analog communications carry in the GATE exam? 

Analog communications carries at least 5-10% weightage in the GATEgate exam.

Quest. How much time will it take to prepare for the GATE exam analog communications topic for the GATE exam

The time taken for preparation depends on how thoroughly the candidate wants to cover the subject and how much time he/she is willing to take out for preparation. For the GATEate exam, reading at least two books on analog communications and communication systems will help one cover the theoretical aspects. Solving MCQs and online quizzes is just as essential as covering the syllabus. 

Quest. What is the GATE exam pattern?

GATE exam comprises three sections: general aptitude, mathematical engineering, and a subject-specific section. Overall, 15% marks weightage will be given to the former, 13% to engineering mathematics, and 72% to the core-subject section.