The speech production mechanism goes through various stages. First, a thought is generated in speakers mind. The thought is put into a sequence of words. These words are converted into a speech signal using various muscles including face muscles, chest muscles, tongue etc. This signal is distorted by environmental factors such as background noise, reverberations, channel distortions when sent t...

The technique of equalization to compensate for the effect of the channel which causes distortion in transmitted signal. Different kinds of equalizers are used depending upon the application of the system and upon the kind of communication channel. The pro channel environment. The purpose of equalization system is to compensate for transmission as signal affected as frequency depended phase or ...

A theory is developed for jointly minimizing the symbol error rate (SER) between the desired and decoded signals with respect to the coefficients of the transmitter and receiver FIR multiple-input multiple-output (MIMO) filters. The original source signal is assumed to be a vector source with equally likely memoryless PAM vector components. The channel model constitutes of a known FIR MIMO tran...

Ultra wide band (UWB) propagation channels are highly rich in multipaths. A major problem encountered in UWB systems is to capture enough multipaths to maintain a sufficient signal to noise ratio (SNR) for further signal processing. This leads to a RAKE receiver with large number of fingers. Channel shortening can help in simplifying the RAKE receiver architecture by reducing the channel taps. ...

We study the interference channel with a signal cognitive relay. A signal cognitive relay knows the transmit signals (but not the messages) of the sources non-causally, and tries to help them communicating with their respective destinations. We derive upper bounds and provide achievable schemes for this channel. These upper and lower bounds are shown to be tight from generalized degrees of free...

Introduction: Mental arithmetic analysis based on Electroencephalogram (EEG) signal for monitoring the state of the user’s brain functioning can be helpful for understanding some psychological disorders such as attention deficit hyperactivity disorder, autism spectrum disorder, or dyscalculia where the difficulty in learning or understanding the arithmetic exists. Most mental arithmetic recogni...

This paper presents a high speed configurable FPGAbased wideband channel sounder with signal bandwidths up to 200MHz and results of a study of dynamic urban picocell channel. The use of FPGA allows the sounder to be adaptable for measurements in different scenarios. Adaptable options include changes to the waveform, bandwidth, channel sampling rate and real-time averaging to improve signal-to-n...

Electroencephalogram (EEG) signals are having very small amplitudes and because of that they can be easily contaminated by different Artifacts. The presence of artifacts makes the analysis of EEG difficult for clinical evaluation. The major types of artifacts that affect the EEG are Power Line noise, eye movements, Electromyogram (EMG), and Electrocardiogram (ECG). Out of these artifacts Power ...

Multichannel audio rendering allows for the immersion of a listener into a rich acoustic scene, as compared to traditional stereophonic methods. Nevertheless, the excessive transmission and storage requirements of multichannel audio pose a considerable obstacle towards its widespread usage. A novel method is presented here with which a single channel of a multichannel signal is conventionally t...