Direct digital synthesis of signals using maximum likelihood bit-stream encoding

A method comprising:

• centering a passband filter around a frequency of a target input signal;
• generating a multi-level digital stream as input to the passband filter, wherein generating the multi-level signal comprises implementing one of:
• Viterbi scheme, reduces state sequence estimation scheme, or M-algorithm;
• and
• coupling the passband filter with a switching type amplifier,
• wherein the target input signal comprises a digital Radio Frequency (RF) signal.

A system comprising:

• an Radio Frequency (RF) power amplifier having non-linear memory;
• a baseband signal processor comprising:
• a passband filter having a passband centered around a frequency of a target input signal;
• and
• circuitry coupled to the passband filter, wherein the circuitry is to generate a multi-level digital stream as input to the passband filter and
• a switching type power amplifier coupled to the passband filter,
• wherein the circuitry comprises logic that implements one of:
• Viterbi scheme, reduces state sequence estimation scheme, or M-algorithm, and
• wherein the target input signal comprises a digital RF signal.