Amplitude modulation is one way to carry information on a carrier, such as a
radio signal. Another way is FM (Frequency Modulation). While FM offers greater
clarity for audio, and the higher frequencies that FM use offer a wider
bandwidth, allowing for more information to be transmitted, one application
where FM and digital are not suitable are Aviation communication, which to this
day still use AM analogue. This is because weaker signals can be heard over
stronger, closer ones with AM, allowing for emergency transmissions to have
more chance of being heard over other traffic. Also, AM uses a narrower
bandwidth than FM, allowing more users in a smaller space. This is important for
the lower frequencies of Radio, where space is at a premium (ie shortwave
bands).
Television Broadcasting
Its used in collector amplitude modulation,Radio frequency recievers ..etc
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.
the modulation system is of FM
Frequency modulation Phase modulation
The percentage power saving when replacing an AM transmitter with modulation index of 0.5 with an SSBSC transmitter with the same modulation index would be approximately 93.75%. This is because SSBSC transmitters only transmit one sideband, while AM transmitters transmit both sidebands, resulting in less power usage and more efficiency.
Television Broadcasting
Television Broadcasting
pcm is used in mobile...
SSBSC uses 1/2 of the bandwidth and 1/6 as much RF power as AM modulated 100% .
radio stations operating at various frequencies.
Analog tv broadcast systems
Pulse position modulation offers high noise immunity, efficient use of bandwidth, and easy implementation with digital circuits. This modulation technique is particularly useful in applications requiring high data transmission rates and reliable communication in noisy environments.
Delta modulation is extremely important for high-tech lives that humans live today. Delta modulation is basically analog to digital and digital to analog signal providers, allowing for radio communication devices such as TV remotes.
PWM finds use in power applications like dc motor speed control
Its used in collector amplitude modulation,Radio frequency recievers ..etc
AM - Amplitude Modulation FM - Frequency Modulation