A5035013338- PAPR reduction in OFDM
- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Advanced DC-DC Converters
- Radar Systems and Signal Processing
- Advanced SAR Imaging Techniques
- Wireless Communication Networks Research
- Advanced Wireless Communication Techniques
- Microwave Imaging and Scattering Analysis
University of South Australia
2017-2023
In this letter, an efficient predistortion scheme is proposed to compensate imperfections in a satellite channel due the nonlinear power amplifier and output filter. The predistorter Wiener system consisting of linear components, which are trained independently. well suited systems where data bits generated onboard satellite. setup effectively compensates distortions has lower complexity compared with other strategies.
A new demapper is presented for communication channels that can be modeled with data-dependent noise on the received symbols. This includes optical and satellite various types of distortion. The incorporates covariance information symbol clusters to capture variation across constellation any dependency between in-phase quadrature components. Two scenarios are considered, it shown advantageous when a system dominated by distortion as opposed thermal noise. Channel coding considerations...
Summary The nonlinear power amplifier and the analogue output channel filter with nonconstant group delay add linear distortions to satellite transmitted signal, respectively. Recently, there has been growing interest in using Wiener predistorters, consisting of separate components, compensate for these downlinks. predistorter shown effectively deal signal lower complexity compared other state‐of‐the‐art methods. In this paper, we argue that fully compensating group‐delay distortion degrades...
In this work, a hardware testbed is proposed to validate predistortion schemes designed compensate for imperfections in satellite channel. Such imperfection arise due the nonlinear power amplifier and output channel filter it crucial verify methods using hardware. The can be used research novel state-of-the-art algorithms or acceptance testing of existing prior launch. Using custom-build testbed, various were compared realistic setup consisting an X-band travelling-wave tube filter. An...
Detection of slow moving targets for a scanning radar in the maritime domain is typically performed using non-coherent detectors with both pulse-to-pulse and/or scan-to-scan integration. Other processing options include coherent slowly radars and frequency agility which decorrelates clutter, but restricts to non-coherent. This paper studies impact these when operating different environments proposes guide selecting waveform that optimises detection performance.