https://padlet.com/athirahtaib/t4mjlw1bqegb Made with a stroke of good luck en-us 2018-09-27 02:31:16 UTC 2018-09-27 02:56:49 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Dartstarget.png athirahtaib https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286321712 👀]]> 2018-09-27 02:35:09 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286321712 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286321838 To send a signal over a bandpass frequency

Can overcome baseband limitations

Demodulation
To get the original intelligence signal back]]> 2018-09-27 02:35:56 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286321838 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322268 1) To allow the use of a smaller antenna.
-  A baseband (low frequency) signal would need a huge antenna because in order to be efficient, the antenna needs to be about 1/10th the length of the wavelength.
-  Modulation shifts the baseband signal up to a much higher frequency, which has much smaller wavelengths and allows the use of a much smaller antenna.


2) To 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

-iqbal-]]> 2018-09-27 02:38:16 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322268 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322450 - to improve quality of reception
- increase range of communication
- reduce noise/interference
- reduce height antenna

Demodulation
- to separate high and low frequency that beyond the audible range of human ears

- Ain, syafiza-]]> 2018-09-27 02:39:20 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322450 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322475 Why modulation?
-baseband transmission has many limitations and only can overcome using modulation
-baseband signal is translated,shifted from low frequency to high frequency and the frequency shift is proportional ti frequency of carrier
*Why demodulation*
-to seeparate the high frequency
-extra signals are mixwd with message signal and must be filtered
-to remove noise in the channel]]> 2018-09-27 02:39:31 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322475 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322626 http://www.padakuu.com/article/33-need-of-modulation-and-demodulation]]> 2018-09-27 02:40:19 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322626 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322695 since the message frequency is too low to travel and reach the destination (because the losses are too much) during the transmission, we modulate it into higher frequency carrier and send it. At the receiver side of the communication system the demodulater separates the information signal from the carrier and then your information signal is processed.

]]> 2018-09-27 02:40:45 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322695 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322938 Pekja
Modulation
Another reason to modulate a signal is to allow the use of a smaller antenna. A baseband (low frequency) signal would need a huge antenna because in order to be efficient, the antenna needs to be about 1/10th the length of the wavelength. 

Demodulation
Process of recovering the information content from the modulated carrier wave]]> 2018-09-27 02:41:29 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286322938 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323143

modulation and demodulation.

Both processes try to achieve transfer information with the minimum distortion, minimum loss and efficient utilization of spectrum.

]]> 2018-09-27 02:42:49 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323143 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323400 1) The modulated wave has large frequency and consists of carrier and side-band frequencies. If the modulated wave is directly fed to the operating device, it wouldn’t at all able to respond to such a high frequencies. So we must separate the higher carrier frequency.

2) In the channel, it is also possible to add some noise to the modulated wave which should be rejected. That is why demodulation is needed.


-iqbal]]> 2018-09-27 02:44:28 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323400 https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323700 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.]]> 2018-09-27 02:46:17 UTC https://padlet.com/athirahtaib/t4mjlw1bqegb/wish/286323700