CMOS Bit-Stream Band-Pass Beamforming

Abstract : We introduce a unique bandpass basedcommon module with reconfigurable, bit-stream baseddigital beam-forming (DBF). An array of bandpass modulators accurately and efficiently digitizes the IFsignals. Beam-forming is implemented directly through bitsteamprocessing of the fast, low-resolution bit-streamoutputs of the quantizers of each bandpass modulator.Fabricated in 65nm CMOS, the prototype DBF generatestwo beams from eight input elements. The prototype is thefirst IC implementation of IF DBF, occupies 0.28mm2, andconsumes 124mW.

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