An Analog Demodulation Scheme for Cross-QAM Constellations

In this paper, we propose an explicit scheme for implementing the fully analog demodulation of cross-QAM (CQAM). The proposed method for threshold estimation can be used in square QAM (SQAM) with an odd number of bits per symbol. Our proposed scheme eliminates the need for an ultra-high-speed analog-to-digital converter (ADC) which, implies intensified power consumption and more complexity over the millimeter-wave (mm-wave) communication. The robustness of the proposed method against analog processing errors has been investigated totally.