We carried out a comparative analysis of the algorithms for detecting a rectangular impulse against Gaussian white noise under either authorized or unauthorized access to the transmitted data. We presupposed that for data transmission the binary communication system is used and that the useful information in the data is whether the signal is present or absent. The case is that unauthorized acce...

When compared to suffixes, prefixes possess several distinctive but largely unexplained properties. This paper explores the idea that these properties might arise from a common source, namely discontinuous recognition of spoken prefixed words, in which listeners ‘skip’ to that portion of the speech stream which contains the root. If this occurs, listeners could potentially perceive prefixes ver...

To meet the challenge of providing adequate coverage at high field strength, a combination of two complementary methods is proposed: reshaped waveforms with the VERSE technique and a modulated angle refocusing train. It was hypothesized that pulses can be reshaped and flip angles can be modulated such that power is cut in half and thus coverage doubled. Volunteer experiments at 3T using an SSFS...

In modern wireless communications, numerous diversity techniques are used to improve the performance of signal transmission over multiple channels. This paper focuses primarily on the evaluation of Quasi Orthogonal & Orthogonal Space-Time Block Codes (STBC) for a 4x2 system model. The paper proceeds by checking which of these two codes Orthogonal STBC or Quasi-orthogonal STBC, is better by eval...

Fundamental limits on detection in low SNR

A modified-SPIDER (spectral phase interferometry for direct electric-field reconstruction) technique where external powerful optical pulses are employed as a light source of chirped reference pulses for sum-frequency generation is proposed and is demonstrated experimentally. It provides great improvements in sensitivity and signal-to-noise ratio, and will enable a single-shot measurement for a ...