Many animals produce and respond to signals made up of multiple components. For example, many avian sexual displays are highly extravagant combinations of visual and acoustic elements, and are described as being 'multicomponent'. One possible reason for the evolution of such complex signals is that they provide more reliable information for receivers. However, receivers also influence signal ev...

We consider a multi-user multiple-input multiple-output (MU-MIMO) system that uses orthogonal frequency division multiplexing (OFDM). Several receivers are developed for data detection of MUMIMO transmissions where two users share the same OFDM time and frequency resources. The receivers have partial state information about the MU-MIMO transmission with each receiver having knowledge of the MU-...

In general, the use of angle-diversity receivers makes it possible to reduce the impact of ambient light noise, path loss and multipath distortion, in part by exploiting the fact that they often receive the desired signal from different directions. Angle-diversity detection can be performed using a composite receiver with multiple detector elements looking in different directions. These are cal...

Dead-reckoning (DR) algorithms, which use self-contained inertial sensors combined with gait analysis, have proven to be effective for pedestrian navigation purposes. In such DR systems, the primary error is often due to accumulated heading drifts. By tightly integrating global navigation satellite system (GNSS) Doppler measurements with DR, such accumulated heading errors can usually be accura...

Blind adaptive minimum mean-squared errors (MMSE) receivers for multiuser direct-sequence code-division multiple access (DS-CDMA) systems that assume knowledge of the steering vector, i.e., the cross-correlation between the desired output and the input signal, are known for their robustness against channel fading as they do not attempt to explicitly track the channel of the user of interest. Ho...

This quasi-experimental study set out to examine the effect of peer corrective feedback on feedback givers and receivers in L2 writing. The forms in focus were a/an, the, and the past tense.The study was conducted in an EFL classroom setting with 45 learners of English in three writing classes which served as the feedback givers, receivers, and the control group.  Over four sessions of treatmen...

Ultrasonic intra-body communication (IBC) is a promising enabling technology for future healthcare applications, due to low attenuation and medical safety of ultrasonic waves the human body. A splitting receiver, referred as splitting-detection separate-decision (SDSD) introduced pulse-based IBCs, SDSD can significantly improve bit-error rate (BER) performance over traditional coherent-detectio...

Low probability of intercept radar signals, which are often problematic to detect and characterize, have as their goal ‘to see and not be seen’. Digital intercept receivers are currently moving away from Fourier-based analysis and towards classical time-frequency analysis techniques for the purpose of analyzing these low probability of intercept radar signals. This paper presents the novel appr...

This paper presents a new algorithm for the detection and correction of certain type of burst noise spikes in DS-CDMA receivers. Keywords— DS-CDMA, burst noise cancellation, Walsh – Hadmard orthogonal codes.

A multiplierless binary FSK detector with 82 dB of dynamic range is presented. The proposed detector is well-suited for low-power direct-conversion receivers used in wireless communications systems employing FSK modulation.