The 3G Transmitter

We have considered possible transmitter configurations in Chapter 2, and in Chapter 3,
we introduced the need for improved linearity for handset (uplink) modulation. The
uplink modulation is HPSK, and this requires considerable linearity to be engineered
into the PA. The cost, as always, is increased power consumption. The need for Power-
Added Efficiency (PAE) in the handset limits the options that can be used to provide linearity.
The additional power available to us in the Node B provides us with a wider
number of options.