Crosstalk reduction for multi-channel optical phase metrology

Optical Frequency Combs: From Frequency Metrology to Optical Phase Control

The merging of continuous wave laser-based precision optical-frequency metrology with mode-locked ultrafast lasers has led to precision control of the visible and near-infrared frequency spectrum produced by mode-locked lasers. Such a phase-controlled mode-locked laser forms the foundation of a “femtosecond optical-frequency comb generator” with a regular comb of sharp lines with well-defined f...

Noise Reduction for Optical OFDM Channel Estimation

I N recent years, Orthogonal Frequency Division Multiplexing (OFDM) has been proposed for optical long-haul communications due to the ease of equalization of the dispersiongoverned fiber optical channel [1]. The approaches pursued can be distinguished into two groups: First, there are coherent optical systems which use quadrature modulation at the transmitter and zero-IF (Intermediate Frequency...

Optical Metrology Third Edition

Speech and Crosstalk Detection in Multi - Channel Audio Stuart

––The analysis of scenarios in which a number of microphones record the activity of speakers, such as in a round-table meeting, presents a number of computational challenges. For example, if each participant wears a microphone, it can receive speech from both the microphone's wearer (local speech) and from other participants (crosstalk). The recorded audio can be broadly classified in four ways...

The directional effect of crosstalk in multi-channel sound reproduction

The effect of increasing inter-channel crosstalk in multichannel reproduction is investigated with auditory model simulations. A standard auditory model is used to estimate the perceptions of listeners in multichannel listening with crosstalk. ITD and ILD cue values are computed for three different loudspeaker setups. The crosstalk is varied between -14 dB and -38 dB. The results show that when...