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The broadcasting nature of wireless communication creates challenges in attaining secure communication. Different approaches have been implemented to increase security in wireless communication with physical layer security being affordable choices as it attains secure communication with the same throughput and easily integrated with higher level security measures. Different physical characteristics...
Pulse Compression Linear Frequency Modulation (PCLFM) waveform is widely used in wideband radars such as Synthetic Aperture Radar (SAR) and Inverse Synthetic Aperture Radar (ISAR). But the LFM waveform suffers from range migration, if the target to be detected and it has a high velocity that the pulses cannot be coherently integrated. A novel method based on wideband matched filter is proposed to...
In increasing radar performance, radar waveform and waveform attributes are key elements. Among different waveforms, Linear Frequency Modulation (LFM) or simply chirp waveform attains best performance in terms of Doppler tolerance and time resolution. In analysing LFM waveform a Fractional Fourier Transform provides superior performance in time-frequency selective environment. Although Chirped Orthogonal...
This paper describes the construction and operating principles of bit-synchronization loop study based research, including the principles of the timing-error detector (Gardner Algorithm), the number- controlled oscillator and the interpolation filter. This paper is divided into three parts and simulation results have been performed using MATLAB. At last, the results are analyzed with conclusion that...
Orthogonal Frequency Division Multiplexing (OFDM) using Fractional Fourier Transform (FrFT) normally known as Chirped OFDM is studied. The Constant Envelope of the Chirped OFDM is then obtained by phase modulation of the chirped OFDM and then its Peak to Average Power Ratio (PAPR) is analyzed. The study shows the Constant Envelope Chirped OFDM (CE-COFDM) has low PAPR than convectional OFDM. Different...
Airborne satellite communication is widely used for both civilian and military applications. For enhancing communication of ASC between aeroplane to satellites, phased array antenna should be employed. Satellite broadband capabilities are required with advent of commercial broadband satellite communication system and series for in-flight civil aircraft. ASC may enhance airline operation by providing...
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