Solid-state lighting with remote tuning and dimming

A light-emitting diode (LED) luminaire, comprising:

• a power converter circuit comprising a first ground reference and a first rectifier diode, the power converter circuit coupled to alternate-current (AC) mains and configured to convert a line voltage from the AC mains into a first direct-current (DC) voltage via the first rectifier diode;
• a first voltage converter circuit configured to down-convert the first DC voltage into a second DC voltage with respect to the first ground reference;
• a plurality of LED arrays comprising a first set of one or more LED arrays with a first positive potential terminal and a first negative potential terminal;
• a first control circuit comprising a photo-coupler circuit configured to receive a first pulse-width modulation (PWM) signal and to control a first LED driving current to drive the first set of one or more LED arrays;
• and
• a transceiver circuit comprising a receiver and a decoder and controller, the transceiver circuit coupled to the first control circuit and configured to receive and demodulate various phase-shift keying (PSK) band-pass signals and to output the first PWM signal,
• wherein:
• the first set of one or more LED arrays is coupled to the first DC voltage at the first positive potential terminal and coupled to the second DC voltage at the first negative potential terminal;
• and
• the photo-coupler circuit comprises an LED and a photo-transistor, the LED configured to emit a light signal responsive to the first PWM signal, and the photo-transistor configured to receive the light signal and to enable the first voltage converter circuit.