You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: Survey of RF Communications and Sensing Convergence Research 
Chapter Title:  E. HIGH FREQUENCY IMAGING AND COMMUNICATIONS 
1. Abstract of Cited Paper (BIB001):  Owing to the low complexity and high level of system integration, the quadrature direct-conversion architecture is widely used in Doppler radar for noncontact detection of slow periodic motions such as mechanical vibrations and physiological motions of respiration and heartbeat. However, precise detection of the complete motion pattern has been challenging due to the high-pass characteristics of the ac-coupled baseband circuitry. A few techniques have been proposed to preserve the actual motion pattern in radar sensing based on hardware modifications that add system complexity and cost. In this paper, a digital post-distortion (DPoD) technique is proposed to compensate for the signal distortions in the digital baseband domain. Without any cumbersome hardware modification, the complete pattern of slow periodic motions can be detected using a simple quadrature direct-conversion architecture with ac-coupled baseband. Experimental results show that the proposed Doppler radar with the DPoD technique is robust to compensate signal distortions and can be used for precise detection of slow Doppler motions (near dc) where ac coupling typically attenuates the signal.

Literature Review:
Systems employing upper millimeter-wave have been proposed for high throughput communications, and fine resolution sensing. For example, Google's Project Soli performs precise motion detection using a 60 GHz radar targeted for mobile devices BIB002 ,  . The ultimate goal is low power, gesture based control for interfaces to the next generation of smartphones and tablets. This complements well with advances in high throughput device-to-device communications using the same frequency range and wireless backhaul applications BIB001 . A single radio could handle both sensing for input control, and communications for high bandwidth applications, potentially simultaneously.