Amplitude-companded single-sideband modulation

Amplitude-Companded Single-Sideband Modulation

Amplitude-companded single-sideband modulation

to get instant updates about 'Amplitude-Companded Single-Sideband Modulation' on your MyPage. Meet other similar minded people. Its Free!


All Updates

ACSSB (amplitude-companded single sideband) is a narrowband modulation method using a single sideband with a pilot tone, allowing an expander in the receiver to restore the amplitude that was severely compressed by the transmitter. It offers advantages over both narrow band fm (NBFM) and ssb modulation methods.

In the case of NBFM modulation, ACSSB offers advantages in terms of reduced bandwidth and improved range for a given power level. In the case of ssb modulation, ACSSB offers improved effective range while simultaneously retaining backwards compatibility with standard ssb radios.

The companding used in ACSSB is a type of dynamic range reduction where in the difference in amplitude between the louder and softer sounds is reduced prior to transmission. A corresponding expander circuit in the receiver inverts this transformation in order to restore the dynamic range. If a conventional ssb receiver is used to receive ACSSB signals, some distortion may be noticed but generally the signals are quite intelligible. Similar techniques are used in audio noise reduction circuits such as those developed for dolby.

ACSSB is being used by amateur radio operators, air-to-ground phones, as well as mobile-satellite services.

External references

  • Milton Mueller The Cato Institute June 3, 1982

Read More

No feeds found

wait Posting your question. Please wait!...

No updates available.
No messages found
Suggested Pages
Tell your friends >
about this page
 Create a new Page
for companies, colleges, celebrities or anything you like.Get updates on MyPage.
Create a new Page
 Find your friends
  Find friends on MyPage from