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High temperature waveguide measurements of the permittivity and permeability

This paper describes a setup for measurements of the permittivity and the permeability at temperatures from room temperature up to 1000 °C using a single rectangular waveguide. The hardware design of the setup that can handle these temperatures is developed and described. Measurements on a NiZn ferrite sample are performed in order to evaluate the performance of the setup and the procedure that is

Custom Silicon Implementation of a Delayless Acoustic Echo Canceller Algorithm

This paper presents a hardware implementation of a high quality acoustic echo canceller for use in handsfree telecommunication systems. The implementation is based on an algorithm with no delay in the signal path, attractive for communication systems where low delay is crucial. However, a zero delay algorithm has higher complexity compared to other canceller solutions. A custom silicon implementat