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Use envelope tracking in multi-carrier PAs

Posted: 16 Mar 2008     Print Version  Bookmark and Share

Keywords:power amplifier  envelope tracking  crest factor  PAPR 

Use envelope tracking in multi-carrier PAs

Modern complex modulation schemes have the disadvantage of requiring linear power amplification, which compromises overall system efficiency because RF power amplifiers (PAs) are much less efficient when backed off from maximum power.

The use of envelope tracking technology enables the efficiency of high-crest-factor RF PAs to be significantly increased, regardless of device technology, while preserving the benefits of high spectral efficiency possible with modern wireless communication standards such as W-CDMA, WiMAX, LTE and DVB.

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