Abstract: There is disclosed, for use in a wireless network, a single-loop feedforward amplification system. The single loop comprises a main amplification branch and a feedforward branch in parallel to the main amplification branch. The main amplification branch contains a delay line that receives and delays the initial low-power input signal, and a power amplifier that amplifies the delayed input signal to produce an amplified output signal. The feedforward branch also receives the input signal and generates an distortion correction signal to compensate for the distortion produced at the output of the power amplifier due to its non-linearity. The distortion correction signal and the distorted amplified output signal are then combined to create a corrected amplified output signal without distortion.

Abstract: There is disclosed a scalable switch fabric architecture comprising: 1) an input switching stage having N inputs and N outputs operable to connect selected ones of the N inputs to selected ones of the N outputs; 2) an output switching stage having M inputs and M outputs operable to connect selected ones of the M inputs to selected ones of the M outputs; 3) a multiplexer stage having a plurality of W-bit input channels and a W-bit output channel, wherein the output channel is coupled to the M inputs of the output switching stage; and 4) a removable core switching stage having N inputs adapted for coupling to the N outputs of the input switching stage and having M outputs adapted for coupling to a first input channel of the multiplexer stage.