Power Scaling Laws for Radio Receiver Front Ends

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we combine practically verified results from circuit theory with communication-theoretic laws. As a result, we obtain closed-form theoretical expressions linking fundamental system design and environment parameters with the power consumption of analog front ends (AFEs) for communication receivers. This collection of scaling laws and bounds is meant to serve as a theoretical reference for practical low power AFE design. We show how AFE power consumption scales with bandwidth, SNDR, and SIR. We build our analysis based on two well established power consumption studies and show that although they have different design approaches, they lead to the same scaling laws. The obtained scaling laws are subsequently used to derive relations between AFE power consumption and several other important communication system parameters, namely, digital modulation constellation size, symbol error probability, error control coding gain, and coding rate. Such relations, in turn, can be used when deciding which system design strategies to adopt for low-power applications. For instance, we show how AFE power scales with environment parameters if the performance is kept constant and we use these results to illustrate that adapting to fading fluctuations can theoretically reduce AFE power consumption by at least 20x.

Original languageEnglish
Pages (from-to)2183-2195
Number of pages13
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume68
Issue number5
Early online date2021
DOIs
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Telecommunications

Free keywords

  • Analog circuits
  • Circuit theory
  • circuit theory
  • communication systems
  • Dynamic range
  • Encoding
  • energy efficiency
  • Hardware
  • Linearity
  • low power
  • Power demand
  • receivers
  • Receivers
  • wireless communication.

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