Power Spectral Analysis of Orthogonal Pulse-Based TH-UWB Signals

• 作者: Paul Richardson Sudhan Majhi
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 工学
• 关键词: Time HOPPING Ultra WIDEBAND Radio ORTHOGONAL PULSE Modulation Power SPECTRAL Density
• 年，卷（期）: 2010,（11）
• 页码范围: 843-849
• 页数: 7页
• 分类号: TN92

摘要

The paper analyzes power spectral density (PSD) of orthogonal pulse-based signals for time hopping ultra wideband (TH-UWB) systems. Our extensive studies show that the PSD of these signals not only depends on the time dithering code and the modulation schemes, but also on the energy spectral density (ESD) of orthogonal pulses. The different order orthogonal pulses provide different ESD which changes the shape of continuous spectral component with symbols. We show that orthogonal pulse-based signals reduce the dynamic range of amplitude of discrete spectral components. Further, we reduce the dynamic range by adopting longer TH code over orthogonal pulse-based signals. As a result, UWB system performance improves with average transmitted power. The theoretical analysis of PSD of orthogonal pulse-based TH-UWB signal is provided in details and verified through simulation results.