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Modified Chirp Waveforms-Based OCC-UWB System With Multiple Interferences Suppression
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DOI：10.1109/JSYST.2016.2535464.png)
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To improve the performance of the ultra-wideband (UWB) system against multiple interferences existed in wireless personal area network (WPAN), such as narrowband interference (NBI), multiple-access interference (MAI), and multipath interference (MI), we present an orthogonal complementary code (OCC)based UWB system with modified chirp waveforms. Considering the time-frequency characteristics of the chirp functions and the principle of NBI suppression, we first propose the modified linear and nonlinear chirp function-based flexible UWB pulses to suppress the multiple NBIs. Furthermore, with the implementation of OCC spread modulation, the modified chirp waveform-based UWB system is presented to effectively alleviate the influence of the MAI and MI. Simulation results and analysis validate the efficiency of the modified chirp pulse-based OCC-UWB system in the suppression of NBIs, MAI, and MI.
Keyword:
Chirp waveform
interference suppression
narrowband interference (NBI)
orthogonal complementary code (OCC)
ultra wideband
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