In this work, the cockroach swarm optimization (CSO) technique was investigated for its potential to reduce side lobe levels of an array linear antennae. This is applied antenna synthesis first time by authors. Variations in excitation phase, number elements, and inter-element spacing were also determine their effects on antenna's level (SLL). The objective work optimize distance strength signa...

In this paper we describe a system that suppresses the acoustic interference due to the coupling between the microphone and the loudspeakers of a hands-free multi-channel desktop audio system. The proposed system operates in the Short-Time Fourier Transform domain and uses spectral subtraction to suppress the unwanted interference, which consists of the local audio and the remote speech signal ...

This paper proposes a double-talk-robust echo canceller using a smoothed-coefficient filter (SCF). The SCF’s tap coefficients are obtained by smoothing those of a pilot adaptive filter (PAF) for better accuracy and stability. The smoothing time constant is controlled by comparing mean squared high-pass errors of the SCF and the PAF. The high-pass filters enable precise control of the SCF by eli...