Pulse Position Modulation Pulse Generator for Ultra-Wideband Communication

• Main Authors: Ying-Te Liu, 劉盈德
• Other Authors: Fu-Chiarng Chen
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/2qcuen

碩士 === 國立交通大學 === 電信工程系所 === 94 === In this thesis, we propose a novel pulse generator for ultra-wideband communication. To satisfy the higher speed of data rate in the short distance communication systems, we propose to use a second-order transient circuit to generate the wideband pulse in this thesis. At first, this pulse generator was fabricated with microstrip line technology and the measurement results worked well. In order to integrate pulse generator, we have applied this identical principle to tape out single chip of TSMC and UMC 0.18um CMOS fabrication process both. A new poly-cycle pulse generator incorporating with a pulse position modulator for use in an impulse radio ultra-wideband system is desinged. The poly-cycle pulse is generated from at least third derivative of the Gaussian pulse. The pulse generator is preceded by a pulse-position modulator and comprises two NMOS and second-order transient circuit. The resulting PPM pulse generator is designed using the TSMC 0.18um COMS technology. The pulse generator implemented with microstrip circuit in advance will verify the system if it functions well. The output waveform indeed fits in with FCC UWB transmit mask: having a pulse duration of about 350 ps and frequency bandwidth from 3.1GHz to 10.6 GHz.