Why do we need to modulate the signal?

Modulation allows us to send a signal over a bandpass frequency range. If every signal gets its own frequency range, then we can transmit multiple signals simultaneously over a single channel, all using different frequency ranges. Another reason to modulate a signal is to allow the use of a smaller antenna.

What are the objectives met by modulation?

What are the objectives met by analog modulation? Length of antenna is shortened, signal loss is reduced, ease of radiation, adjustment of bandwidth, shifting signal frequency of the assigned value.

Why is baseband important?

A signal at baseband is often used to modulate a higher frequency carrier signal in order that it may be transmitted via radio. Modulation results in shifting the signal up to much higher frequencies (radio frequencies, or RF) than it originally spanned.

Why a sinusoidal signal is considered analog?

Analog signal is a continuous signal and digital signal is a discrete signal. A sinusoidal signal is a continuous signal with respect to time. Therefore, sinusoidal signal is a analog signal.

What is the role of the modulation operation?

The purpose of modulation is to impress the information on the carrier wave, which is used to carry the information to another location. In radio communication the modulated carrier is transmitted through space as a radio wave to a radio receiver. A modulator is a device or circuit that performs modulation.

What are the properties of modulated signals?

There are various forms of modulation, each designed to alter a particular characteristic of the carrier wave. The most commonly altered characteristics include amplitude, frequency, phase, pulse sequence, and pulse duration.

What is baseband signal receiver?

Baseband Signal Receiver is used when a Baseband signal also known as a lowpass signal is transmissions through a channel any modulation technique employed.