A novel ir-uwb pulse generator design using bpm and FM technique

Abstract

A novel design of impulse radio ultra wideband (IR-UWB) pulse generator with two models of 2-Gbps and 3- Gbps is presented. Bi-phase modulation (BPM) and frequency modulation (FM) techniques are used together with the nitial generated pulse of 1 ns to achieve the higher speeds. The generated pulse spectrum complies with the UWB Federal Communication Commission (FCC) regulations of indoor mask, working between 3.1 - 10.6 GHz with power of ess than -41.3 dBm/MHz. The proposed low cost - pulse generator is based on simple structure of shaping continuous ine wave signal to UWB pulses, where the generator can be fabricated through a discrete circuit. The filtering process s achieved by the designed stepped-impedance low-pass microstrip filter. Based on the generated pulse characteristics, he generator can utilize the Frequency Division Multiple Access (FDMA) to connect two users simultaneously. The design results have been simulated using Advance Design System (ADS) software.