Air traffic management (ATM) of manned and unmanned aerial vehicles (AVs) relies critically on ubiquitous location tracking. While technologies exist for AVs to broadcast their periodically airports track detect AVs, methods verify the locations complement ATM coverage are urgently needed, addressing anti-spoofing safe coexistence concerns. In this work, we propose an solution by exploiting non...

A novel approach for suppression of grain noise in ultrasonic signals, based on noncoherent detector statistics and signal entropy, is presented. The performance of the technique is demonstrated using ultrasonic B-scans from samples with coarse material structure.

Noncoherent minimum mean-squared error (MMSE)-based multiuser receivers are proposed for nonorthogonal multipulse modulation. The three proposed receivers have a common MMSE pre-filter and are followed by one of three distinct noncoherent decision rules. The simplest decision rule selects the maximum magnitude of the MMSE filter outputs and the other two decision rules account for the second-or...

In this paper, a new method for determining the number of coherent/correlated signals in the presence of colored noise is proposed which is based on the Eigen Increment Threshold (EIT) method. First, we present a new approach which combines EIT criterion and eigenvalue correction. The simulation results show that the new method estimates the number of noncoherent signals in the presence of colo...

This paper proposes noncoherent PN acquisition schemes that combine the hybrid structure, the RAKE structure, and the double/multiple-dwell technique in order to improve the performance in a frequency-selective fading channel. The hybrid structure reduces the acquisition time compared to a serial scheme. The RAKE structure enhances the received signal strength of a multipath faded signal, while...

The problem of detecting a sinusoid with drifting phase in the presence of additive white Gaussian noise is considered. A Lorentzian signal model is used, in which the signal to be detected is modeled as a sinusoid whose phase is drifting with Brownian motion. A class of quadratic detectors that trade off coherent and noncoherent averaging of the received waveform is studied. The deflection rat...

Postdetection combining is a popular means to improve the bit error performance of DPSK and noncoherent FSK (NFSK) systems over fading channels. Nevertheless, the error performance of such systems in an arbitrarily correlated Nakagami environment is not available in the literature. The difficulty arises from inherent nonlinearity in noncoherent detection and from attempts to determine explicitl...

104705-06-0909 IJECS-IJENS © December 2010 IJENS I J E N S Abstract—Frequency shift keying (FSK) systems enjoy the highest power efficiencies among the available modulation schemes but are accompanied by the lowest bandwidth (BW) efficiencies. Additional receiver complexities arise due to accurate phase estimations required for a large number of carrier frequencies in phase-coherent synchronous...