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Receivers for mmWave systems suffer from high power consumption in Analog toDigital Converters (ADC), and there is a need to compare the three majorreceiver architectures: Analog, Hybrid and Digital Combining (AC, HC and DC).Moreover, the specific power consumption figure of merit of ADCs variessignificantly between different component designs in the literature, so thatcomparisons performed for one ADC model - no matter how representative of thestate of the art - do not necessarily carry over to other ADC designs withdifferent figures of merit. In this work, we formulate a comparison methodbetween AC, HC and DC that can be easily reproduced with different powerconsumption parameters and provides all information for receiver architectureselection in a compact chart figure. We also present an interpretation of thereceiver selection decision problem as a multi-objective utility optimizationto find the best Spectral Efficiency (SE) versus Energy Efficiency (EE)trade-off. We use existing results on the achievable rate of AC, HC and DCsystems and an Additive Quantization Noise Model (AQNM) of the ADC capacitydegradation. For some example commercial component parameters, we show that theusually held belief that DC requires the highest power is not valid in manycases. Rather, either DC or HC alternatively result in the better SE vs EEtrade-off depending strongly on the considered component parameters and on theweight assigned to SE vs EE in the utility maximization.

Millimeter Wave Receiver Comparison Under Energy vs Spectral Efficiency Trade-off