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This paper deals with a novel wireless biosignal acquisition system employing ZigBee wireless technology, which consists mainly of two components, an intelligent electrode and a data acquisition host. The former is the main topic of this paper. It is placed on a subject's body to amplify biosignals such as EMG or ECG and streams its data at up to 2 ksps. One of the most remarkable features of the intelligent electrode is that it can change its own parameters, both digital and analog, online. The author describes its design first, then introduces a small, light, and low-cost implementation of the intelligent electrode called 'VAMPIRE-BAT.' He then presents some experimental results to confirm its usability and to estimate its practical performances. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(5): 1-10, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11489 5 [ABSTRACT FROM AUTHOR]

A new autonomous implant sensor positioning measurement technique is discussed. The goal of this study is to develop ubiquitous medical systems with autonomous nano-medical sensors and robots. The key to achieving the goal is to establish autonomous positioning measurement for these implant objects without imposing a burden on patients. For this purpose, this study proposes autonomous positioning measurement with human voxel data. The technique combines two algorithms: autonomous distributed measurement of sensors with Sammon's map, which is a nonlinear mapping algorithm, and a voxel human model clustered with the propagation characteristics of human tissue. A simulation experiment shows that the proposed technique makes possible precise positioning measurement in a heterogeneous propagation environment in the human body. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(6): 1-9, 2011; Published online in Wiley Online Library (). DOI 10.1002/ecj.10336 [ABSTRACT FROM AUTHOR]