Analysis of new crosstalk multiple access systems for inductive communication systems

Abstract

Crosstalk is a major concern which impacts the performance of inductive systems including wireless power transfer, inductive communication systems and embedded inductive powering of biomedical devices. In this paper we seek to show that crosstalk can be either an incentive or a disadvantage if it is not harnessed properly. Therefore we propose as a major contribution a new multiple access system based on crosstalk, the new crosstalk multi-access system (CMAS) for inductive communication channels. To achieve CMAS multiple-input-multiple-output (MIMO) communication is used. Mutual coupling channels are designed to use block coding to identify system nodes and to also decouple the multi-channel responses into orthogonal sources. This provides crosstalk diversity at the receivers. A receiver is able to assemble multiple received signals from multiple sources, eliminating inductive co-channel interference thereby increasing the system signal-to-noise ratio (SNR) and overall system capacity.