1. What is the significance of spread spectrum? The narrow bandwidth signal is spread over wide band with the help of special code. Hence the name-spread spectrum is given. 2. What is the use of special code in spread spectrum? The special code decides the way in which narrowband signal is spread over wide band. [...]

1. What is meant by Digital transmission & give any two advantages of it? Digital transmission is the transmittal of digital signals between two or more points in a communication system. Advantages: – Noise immunity – More noise resistant 2. What is meant by pulse modulation & name the methods of it? Pulse modulation includes [...]

1. What does Digital Communication mean? The digital communication is type of communication in which the digital data is transmitted directly or modulates some carrier. It covers a broad area of communications techniques, including digital transmission and digital radio. 2. State Shannon limit for information capacity (or) State Shannon¢s Theorem. Shannon¢s theorem states that relating [...]

1. Define Angle Modulations. Angle modulation is the process of changing the phase or frequency of the high frequency carrier signal in proportion with the instantaneous values of the message signal. 2. Define direct Frequency Modulation. Varying the frequency of a constant amplitude carrier directly proportional to the amplitude of the modulating signal at a [...]

1. What is meant by communication & what are the three essential things used in Communication? Communication is the process of establishing connection (or link) between two points for information exchange. There are three essential things used in communication. They are -Transmitter -Receiver -Communication channel 2. What is meant by Modulation & Demodulation? Modulation is [...]