Podsiadlik, Tomasz and Dooley, John and Farrell, Ronan and Grebennikov, Andrei
Design of signal modulator for RF polar transmitter.
In: IEEE Radio and Wireless Symposium (RWW 2012), 15–18 January 2012, Santa Clara, California, USA.
This paper presents new approach to signal modulation
for high efficiency polar transmitter. The new modulator
is derived by analyzing complex to polar transforming equations.
Once spectral behavior of an envelope and phase signals
are known, new architecture offering lower complexity in an
analog domain and more flexibility for reconfiguration than a
conventional modulator is derived. Concept of the modulator is
verified in the course of step-by step simulations with a 5MHz
BW input signal at a carrier frequency fC = 2:14GHz. Also,
a drain efficiency of a Class E PA driven by the modulator is
discussed, and optimal solution for sampling rate is proposed
Repository Staff Only(login required)
||Item control page