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Need for modulation:
1. Length of the antenna for a transmitter is inversly proportional to the frequency of the signal to be transmitted. So we try shift the frequency of the singal for the transmission to higher frequencies.
2. Every transmission of signal in a bandwidth is assigned with a particular frequency which is attained by modulating the signal with the carrier frequency.
Different modulation techniques are implemented according to the requirements and compatibilities
Wiki User
∙ 14y ago
Wiki User
∙ 11y agothe purpose of a communicatin system is to transmit informations or messeges signals
Wiki User
∙ 11y agothe necessity of modulation is for long distance communication with carrier, and avoid losses
Wiki User
∙ 11y agoimportance of modulation
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What is need to modulation in communication system?
Need for modulation 1) to reduce the antenna height 2) to multiplex the more number of signals 3) to reduce the noise & distortions 4) to narrow banding the signal 5) to reduce equipment
What is an early communication system that uses continuous wave modulation?
Morse code and the Telegraph had that technology.
What is hybrid modulation?
—Analog digital hybrid modulation seeks the ways to eliminate the incoherent quantization noise component in digital communication, instead of conveniently making it minimal.
Amplitude modulation applications?
In olden days all radio stations followed only amplitude modulation to propagate the signals. Presently still some of the radio stations follow the same and mostly have switched over to frequency modulation. Especailly in tv transmission the picture signal is propagated only by amplitude modulation.
When modulation frequency is doubled the modulation index is halved and the modulating voltage remains constant the modulation system is?
the modulation system is of FM
What are the modulation tecniques in mobile communication?
qpsk modulation
The amount of frequency shift during modulation is called?
Frequency shift keying in digital communication and Frequency modulation in analog communication..........
What are modulation techniques in satellite communication?
frequency modulation, preferably.
What is modulation in data communication?
Data modulation is a method of Electronic packing of data. In Data communication data is transmitted through a process which is called "Data Modulation".
Where is delta modulation used?
Adaptive delta modulation is used in audio communication systems to avoid the two drawback of delta modulation.
Need for modulation?
modulation
Where is adaptive delta modulation used?
Adaptive delta modulation is used in audio communication systems to avoid the two drawback of delta modulation.
Explain the term modulation. how does it help in data communication?
Modulation is the addition of information to an electronic or optical signal carrier. The modulation can be applied by turning the signal on and off.
What are the two types of wave communication used in broadcasting?
AM and FM AM=Amplitude Modulation FM=Frequency Modulation Hope this helps
How is analog modulation different from digital modulation?
i refered modulation is the sequence of message in to analog symbol( Simon haykin ,communication systems),,but i am not clear with this,couul u pls clarify?
How the power levels are measured in communication system?
A: Dbm or decibel of modulation
What kind of modulation used for land phone communication system?
Analog
