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It is well known that Pseudo Chaotic Time Hoping modulation method used in UWB system helps reduce the spectrum spike appearing in the conventional impulse radio system. Unlike a typical TH-UWB, the PCTH-UWB system exploits concepts from symbolic dynamics to generate aperiodic sequences which modulate the position of pulses. In this paper, the bit error rate performance of the TMA-PCTH-UWB system...
High peak-to-average power ratio (PAPR) of the transmit signal is a major drawback of wavelet packet modulation (WPM). The article presents a new method to reduce PAPR by Linear Programming (LP) to select the optimal wavelet packet basis. Numerical and simulation results show the signal modulated by the selected wavelet packet basis has the optimal PAPR values with given wavelet packet tree space...
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