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In this paper, a novel quasi-4PPM modulation is presented firstly for UWB systems, and then the corresponding synchronization and demodulation schemes are proposed. Due to the nature of the unique signal structure, the information bits are transmitted and demodulated by twos, which doubles the transmission efficiency compared with conventional existing methods under the same condition. Besides, the...
Energy detection is attractive for UWB signal reception because of the low implementation complexity. Its performance in the presence of synchronization errors has not been addressed before. In this paper, we investigate the effects of synchronization errors on conventional energy detection (CED) with orthogonal pulse position modulation (OPPM) and block-coded pulse position modulation (BC-PPM). Moreover,...
The novel chaotic stream DS-UWB system proposed in this paper accomplishes synchronization, modulation and encryption of data in only one channel transmission mechanism. The architecture of the system combines the chaotic pulse position modulation, the complex chaotic stream ciphers encryption and the chaotic direct spread codes with the PAM based DS-UWB communication system. The synchronization of...
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