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## Introduction

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Short-Range Micro-Motion Sensing with Radar Technology — Recommend this title to your library

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This Chapter gives an Introduction to the broad design phases of radar motion sensing. Due to the technical advancements in semiconductor, signal processing, and system integration, radar has emerged as a promising technique for short-range motion sensing, detecting an object's relative displacement motions with very high accuracy. It can be used as a solution for noncontact gesture sensing as it transmits radio frequency signals to the target, and the target's movement can be extracted by analyzing the backscattering reflections. It is a promising and attractive form of HCI for emerging applications in wearable, mobile, and ubiquitous computing, where the traditional touch interaction is not desired or difficult if not impossible.

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