in current years, the application of biopotential signals has received a lot of attention in literature. one of these signals is an electromyogram (emg) generated by active muscles. surface emg (semg) signal is recorded over the skin, as the representative of the muscle activity. since its amplitude can be as low as 50 µv, it is sensitive to undesirable noise signals such as power‑line interfer...

The performance of optimal codes on frequency-hopped channels with partial-band interference is investigated. The performance measures considered are channel capacity and cutoff rate. Worst-case partial-hand Gaussian noise interference is assumed with the interference independent of the transmitted signal. The capacity and cutoff rate are calculated as a function of the signal-to-noise ratio. W...

This work uses the second order statistics of the signal received by a CDMA mobile to determine what proportion of that signal consists of in-cell interference and what proportion is out-of-cell interference plus thermal noise. A least-squares estimator is derived and compared to the Cramer-Rao Lower Bound. The interference estimates are incorporated into the CDMA mobile channel decoder in orde...

Global Navigation Satellite System (GNSS) signals, such as those from United States Global Positioning System (GPS), Europe’s Galileo, and Russia’s Global Navigation Satellite System (GLONASS), typically have extremely low received signal strengths at the Earth’s surface and are therefore susceptible to a range of interference signals. Such interference examples include, but not limited to, int...

BACKGROUND Modern biomedical amplifiers have a very high common mode rejection ratio. Nevertheless, recordings are often contaminated by residual power-line interference. Traditional analogue and digital filters are known to suppress ECG components near to the power-line frequency. Different types of digital notch filters are widely used despite their inherent contradiction: tolerable signal di...

In this paper, we characterise the joint interference alignment (IA) and power allocation strategies for a K-user multicell multiple-input multiple-output (MIMO) Gaussian interference channel. We consider a MIMO interference channel with blind-IA through staggered antenna switching on the receiver. We explore the power allocation and feasibility condition for cooperative cell-edge (CE) mobile u...

The analysis of the electromyographic signal of the diaphragm muscle (EMGdi) can provide important information in order to evaluate the respiratory muscular function. However, EMGdi signals are usually contaminated by the electrocardiographic (ECG) signal. An adaptive noise cancellation (ANC) based on event-synchronous cancellation can be used to reduce the ECG interference in the recorded EMGd...

Compressive sensing (CS) is compared with conventional beamforming using horizontal beamforming of at-sea, towed-array data. They are compared qualitatively using bearing time records and quantitatively using signal-to-interference ratio. Qualitatively, CS exhibits lower levels of background interference than conventional beamforming. Furthermore, bearing time records show increasing, but toler...

This paper investigates the dominant impact on the interference rejection combining (IRC) receiver due to the downlink reference signal (RS) based covariance matrix estimation scheme. When the transmission modes using the cell-specific RS (CRS) in LTE/LTE-Advanced are assumed, the property of the non-precoded CRS is different from that of the data signals. This difference poses two problems to ...

A particular challenge for SETI searches is choosing the type of signal to seek. Past applications of communication theory to this issue have failed to infer any credible concrete characteristics of a signal on the basis of standard measures of detection sensitivity such as detection and false alarm probabilities. However, these efforts have also ignored radiofrequency interference, which is a ...