Splitting Receiver with Joint Envelope and Coherent Detection

TL;DR

This paper introduces a novel receiver design that combines envelope and coherent detection, providing analytical performance limits and demonstrating advantages over traditional methods at various SNR levels.

Contribution

It presents a new splitting receiver with joint envelope and coherent detection, including closed-form high SNR analysis and optimal splitting ratio derivation.

Findings

High SNR approximations are accurate across moderate SNRs.

The proposed receiver outperforms traditional receivers under certain conditions.

Analytical insights guide the design of more efficient splitting receivers.

Abstract

This letter proposes a new splitting receiver design with joint envelope detection (ED) and coherent detection (CD). To characterize its fundamental performance limit, we conduct high signal-to-noise ratio (SNR) analysis on the proposed ED-CD splitting receiver and obtain closed-form approximations of both the achievable mutual information and the optimal splitting ratio (i.e., a key design parameter of the receiver). Our numerical results show that these high SNR approximations are accurate over a wide range of moderate SNR values, signifying the usefulness of the obtained analytical results. We also provide insights on the conditions at which the proposed splitting receiver has significant performance advantages over the traditional receivers.