0
Carrier Wave:
A carrier wave is a high-frequency electromagnetic wave that is used as the "carrier" or the base signal in a modulation process.
It is typically a pure sine wave with a constant frequency and amplitude.
The carrier wave by itself does not carry any information; it serves as a vehicle to carry the information from one location to another.
In AM and FM radio broadcasting, the carrier wave is the primary signal transmitted by the radio station.
Modulated Wave:
A modulated wave is the result of combining the carrier wave with an information signal, such as an audio signal or data.
Modulation is the process of varying the characteristics of the carrier wave (either its amplitude or frequency) in accordance with the information signal.
There are two common types of modulation: Amplitude Modulation (AM) and Frequency Modulation (FM).
In AM, the amplitude of the carrier wave is varied in proportion to the amplitude of the information signal. This variation encodes the information onto the carrier wave.
In FM, the frequency of the carrier wave is varied in proportion to the amplitude of the information signal. This variation encodes the information onto the carrier wave.
The modulated wave contains the information that needs to be transmitted, and it can be demodulated at the receiving end to retrieve the original information.
VS Waterproofing
Add your answer:
Earn +20 pts
What is the difference between a high frequency UPS and a Low frequency UPS?
The difference is in sine wave generation algorithm. In HI freq - it is 30kHz signal, modulated by 50Hz.
What is difference between modulator and demodulator?
Modulation is used when information is available in analog form that varies the frequency and/or amplitude of a lower frequency wave, depending on the information it carries. The role of modulation is to place this information onto a carrier frequency that can be transmitted more readily and with least loss of information. There are three fundamental types of modulation - frequency modulation, amplitude modulation and phase modulation. In each of these, a carrier frequency is modulated by a lower frequency, to form a modulated carrier wave. A modulator modulates the carrier frequency, while a demodulator detects the modulation on the carrier wave and recovers the original lower frequency waveform at the destination. For many years the modulated carrier wave was converted to a radio signal. Now it is often an electrical signal which is sent down a teleohone line; the information is usually a set of pulses going between computers. When computers are connected to each other in a two-way conversation, the MOdulator and DEModulator are combined into a single device called a MODEM.
If modulation index is greater than one than what happens?
it causes over modulation .... that is the phase reversal of carrier signal ..... the modulated wave then exhibits envelope distortion which results in loss of data .....
What is the difference between a wave and signal?
1.wave is a three dimensional object where as signal is a two dimensional object
What is the difference between the AM modulation and ASK modulation?
This is hard to explain. AM means amplitude modulation, while ASK is amplitude-shift keying. AM is usually analog as it is modulated based on the strength of the signal, though you can use it to send a digital signal. ASK represents digital data as variations in the amplitude of a carrier wave. Any digital modulation technique will represent the data using a finite number of different signals. While AM is used mostly for radio and television, ASK is used for telegraph signals, transmission across telecommunications equipment, and fiber optics.
What is demodulation in communication?
recovering the information content from modulated carrier wave
What parameter of a sine wave carrier can be modulated?
Amplitude, Frequency and Phase
What is the meaning of modulated wave?
Modulation is where an electronic signal (base) is combined with another electronic signal (carrier).The base could be audio, video or digital. The carrier is the frequency that a receiver (radio or television) is tuned to.The modulated wave is the result of this combination.
What do you understand by modulation?
Modulation is a word applied to anything that varies in level. Brake pads are modulated in an anti lock braking system. The human voice can be modulated whilst singing to give a pleasing sound An audio signal can be superimposed upon a carrier wave in broadcasting. The carrier wave is amplitude modulated by the audio signal.
What is the meaning of suppressed carrier in am?
radio an amplitude-modulated wave in which only the sidebands are transmitted, the carrier being removedhttp://dictionary.reference.com/browse/suppressed+carrier+modulation
How does a wave carrier affect what you hear on the radio?
The carrier wave carries the information that you hear. It is modulated by the sound which varies its amplitude or frequency. Without the carrier there would be nothing to vary so you would hear nothing.
What is difference between lifi and wifi?
In wifi, modulated signal is radio wave where as life modulated signal is light. It is visible electromagnetic spectrum and has higher bandwidth than wifi but has Line of sight limitation.
What is the difference between a high frequency UPS and a Low frequency UPS?
The difference is in sine wave generation algorithm. In HI freq - it is 30kHz signal, modulated by 50Hz.
Difference between dsb lc dsb SC?
The difference between double side band long carrier (DSB LC) and double side band short carrier (DSB SC) is the is how the amplitude modulation (AM) is referenced in the carrier wave.
What is the relation between carrier frequency and modulating signal?
If the modulating system is AM (Amplitude Modulation) then the amplitude of the carrier wave changes with the amplitude of the modulation. On a specrum analyser that shows up as frequency sidebands. If the frequency of the carrier waves depends on the amplitude of the modulating signal that is called FM (frequency modulation). On a spectrum analyser that shows up as sidebands also.
What is difference between modulator and demodulator?
Modulation is used when information is available in analog form that varies the frequency and/or amplitude of a lower frequency wave, depending on the information it carries. The role of modulation is to place this information onto a carrier frequency that can be transmitted more readily and with least loss of information. There are three fundamental types of modulation - frequency modulation, amplitude modulation and phase modulation. In each of these, a carrier frequency is modulated by a lower frequency, to form a modulated carrier wave. A modulator modulates the carrier frequency, while a demodulator detects the modulation on the carrier wave and recovers the original lower frequency waveform at the destination. For many years the modulated carrier wave was converted to a radio signal. Now it is often an electrical signal which is sent down a teleohone line; the information is usually a set of pulses going between computers. When computers are connected to each other in a two-way conversation, the MOdulator and DEModulator are combined into a single device called a MODEM.
What is a modulated carrier waves?
A modulated carrier wave is the output of a modulator that includes the information of the signal that is applied to the carrier.When a signal typically a piece of music in the range of say 30Hz to 30KHz is applied to an AM modulator (not sure about FM or PM) with a carrier of say 3MHz the output consists of 4 packetsUpper Sideband (Carrier + Signal) 3.000003MHz to 3.03MhzLower Sideband (Carrier - Signal) .297MHz to .299997MHzCarrier 3MHzSignal 30Hz to 30KHzEither sideband in the case of Single Side Band (SSB) or Both (.297MHz to 3.03Mhz) in the case of Double Side Band (DSB) could be referred to as modulated carrier waves
