Performance of an Experimental Angle-Diversity Troposcatter System

Fading Correlation Analysis in MIMO-OFDM Troposcatter Communications: Space, Frequency, Angle and Space-Frequency Diversity

“…As noticed, the squint loss increases with increasing beam-width because the separations are given in beam-widths. Similar results for the squint-loss is presented in [9] for the angle diversity. According to the experimental results, the upper and lower beams show 5 − 10 dB squint-loss for 0.6 • 3 dB beamwidth and 1 • beam separation (∆w ≈ 1.6 in beam-width).…”

“…[4], [5] focus on frequency correlation in the troposcatter links. The correlation and path-loss results for the angle diversity systems are provided in [8], [9]. We utilize these empirical suggestions and experimental studies to to validate our results.…”

“…x is much greater than l c y as in [16], we assume that l x = 4 × l y [16]. The geometry dependency of the scattering cross-section can be determined with sin(Ψ) −11/3 as experimentally validated in [9]. With the proposed simplifications for the correlation analysis, the resulting power relationship in the troposcatter channel is found as…”

“…These diversity techniques are employed by the modern troposcatter systems [2], but there are no analytical fading correlation studies. Therefore, we develop the Ring Scatter Model (RSM) to analyze the fading correlation in troposcatter links and compare our results with the empirical values provided by the industry [2], ITU [3], and the experimental results [4]- [9]. In addition, one of the most important contributions of this work is the prediction of 50% coherence bandwidth based on the frequency separation results.…”

Fading correlation modelling for troposcatter microwave propagation in array antenna detection applications

“…The troposcatter channel fading correlation has been well studied under cooperative occasions, e.g. communication both theoretically [5][6][7][8][9][10][11][12] and experimentally [13][14][15][16][17][18][19][20][21][22]. Troposcatter communication is marred by channel fading, while diversity receptions provide additional independent channels to relieve fading deterioration, and consequently promote the communications reliability and data rate efficiently.…”