An Improved Update Rate Baud Rate CDR for Integrating Human Body Communication Receiver

摘要

Human Body Communication (HBC) utilizes the electrical conduction property of the human body to use it as a communication medium to connect devices around the body. The body channel has broadband characteristics, which enables wireline-like broadband communication. However, environmental interference proves to be a primary bottleneck in broadband HBC implementation. An integrating front-end followed by periodic sampling enables interference robust broadband HBC. The integration operation is sensitive to data, clock phase mismatch, requiring a Clock Data Recovery (CDR) loop for proper phase alignment between clock and data. This paper analyzes a Baud Rate Mueller-Muller (MM) CDR for an integrating front-end and utilizes the properties of the integration operation to propose a integrating MM CDR, which provides higher update rate than a traditional MM CDR. Simulation results show 1.67x higher clock data frequency offset tolerance of the integrating CDR compared to traditional MM CDR.