Universal platform for software defined radio

A universal platform for software defined radio, comprising:

• an n (n being an integer of 3 or more)-port receiver including:
• a first input terminal receiving a received signal,
• a second input terminal receiving a local signal,
• a plurality of power detectors for receiving a plurality of input power signals and generating a plurality of analog power-detected output signals
• a directional coupler coupled to the first input terminal and a first power detector of said plurality of power detectors said directional coupler operating to directionally couple said received signal to said first power detector, said directional coupler generating a first output signal,
• at least first and second dividers, said first divider coupled to said directional coupler and a second power detector of said plurality of power detectors, and operating to divide the first output signal, said first divider generating a second output signal, said second divider coupled to said second input terminal and a third power detector of said plurality of power detectors, and operating to divide the local signal, said second divider generating a third output signal, and
• a phase shifter coupled to said at least first and second dividers, said phase shifter operating to shift the phase of said second output signal or the phase of said third output signal;
• at least one analog-to-digital (A/D) converter for converting the output analog power-detected output signal from a corresponding power detector to a digital signal;
• and
• a digital signal processing part for converting the power-detected output signal of the power detector through the A/D converter to a plurality of signal components included in the received signal or the local signal.