+28.5dBm 5-7GHz FIR and Doherty Polar DTX Achieving -155dBc/Hz OOC Noise for WiFi MLO Applications

This work introduces the first implementation of mixed-domain FIR filtering in a +28.5dBm, 5-7GHz polar digital transmitter with Doherty load modulation, achieving -155dBc/Hz Rx-noise levels at configurable offsets while meeting WiFi 4k-QAM EVM requirements across 40/80/160MHz bandwidths. Utilizing 14nm Fin-FET technology, the design proposes an integrated and efficient solution for future wireless communication coexistence scenarios, reducing OOC noise without external filters. Keywords - WiFi, Polar Digital Transmitter, Mixed-Domain FIR, DPA, Doherty, OOC Noise.