Does the contact between the amplitude of the message signal (Am) to the amplitude of the SSB signal (Vusb or Vlsb) is Am/2?

In other words, if I will change the amplitude of the carrier signal (Ac) it will not effect the amplitude of the SSB signal?

Thanks!

 

Yes it will effect the amplitude,the amplitude is the volume of the signal, SSB suppress the carrier,so it doesn't need a bigger bandwidth.

 

Yes it will effect the amplitude,the amplitude is the volume of the signal, SSB suppress the carrier,so it doesn't need a bigger bandwidth.

How can I calculate the amplitude of the SSB signal? doesn't it Am/2?

 

Hello,

Have a look at the following page:
http://www.williamson-labs.com/480_ssb.htm

Bertus

 

Hello,

Have a look at the following page:
http://www.williamson-labs.com/480_ssb.htm

Bertus

I didn't find an answer for my question in this site.

How can i calculate the voltage/amplitude of the usb or lsb signal?

 

Hello,

Did you read this over there?

SSB-ver-AM
(1) Since the carrier is not transmitted, there is a reduction by 50%
of the transmitted power (-3dBm). --In AM @100% modulation: 1/2 of the power is comprised of the carrier; with the remaining (1/2) power in both sidebands.

(2) Because in SSB, only one sideband is transmitted, there is a further reduction
by 50% in transmitted power (-3dBm (+) -3dBm = -6dBm).

(3) Finally, because only one sideband is received, the receiver's needed
bandwidth is reduced by one half--thus effectively reducing the
required power by the transmitter another 50% (-3dBm (+) -3dBm (+) -3dBm = -9dBm). --Remember, if a receiver's bandwidth can be reduced by 50%: the needed transmitter power is also reduced by 50%, i.e., the receiver's Signal to Noise Ratio (SNR) is improved as the receiver bandwidth is reduced. This of course implies that the signal containing the information is not lost--which is the case in this instance.

Bertus

 

Hello,

Did you read this over there?



Bertus

Yes but I didn't quite understand it . Why it is so difficult for your to give me the formula for calculating this?

 

Hello,

If you want formulas, then have a look at the following PDF:
http://www.fcet.staffs.ac.uk/alg1/2004_5/Semester_1/Communications, COMMS (CE00038-2)/Analog_mod_Revision.pdf

Bertus

PS did you read the following thread before posting here?
PLEASE READ - Posting Questions in the Homework Help Forum

 

An AM transmitter of a 1000Watts would be the same as a SSB transmitter at 250Watts, with no loss of audio quality, ssb uses a quarter of the power needed of an AM set.