On Analog QAM Demodulation for Millimeter-Wave Communications

Recent interest in wideband multi-giga-bit-per-second wireless communications over millimeter-wave frequencies has created both new opportunities and design challenges. The realization of such technologies including multi-giga-samples-per-second data conversion and digital signal processing systems is extremely challenging. In this brief, we propose a fully analog QAM demodulator as a step toward eliminating the power-hungry and ultra-high speed mixed-signal components (e.g., analog-to-digital converter). The proposed low-complexity, low-overhead solution is shown to be robust against analog processing errors.