Sub Band Partitioning Of MB-IR-UWB And The Analysis Of Its Anti Jamming Performance

Currently,the wireless short-range communication network is becoming widely used by users.However,an important problem to be solved is how to transit-data with high speed and high quality.With the advantages of high transmission rate,large space capacity,strong penetrating power,low power consumption,low cost and ability to share spectrum resources with other wireless communication systems,ultra-wideband technology is drawing increasingly more attention in the field of short-range communications.And by introduction of multi-band communications into conventional UWB system,people can further improve the system transmission rate,increase frequency diversity gain and increase the flexibility of spectrum utilization.This paper analyzes the scheme of multi-band system's sub-band division,then under the premise of ensuring the effectiveness of the system,further improve the flexibility of the system of spectrum,reduce the impact of interference on the system and improve system reliability.Firstly the overall model of multi-band impulse radio Ultra-Wide-Band(MB-IR-UWB)had been proposed.The paper introduces model from the transmitter and receiver parts.Then this paper mainly analyzes and introduces the key technology among it: the generation and modulation multiple access technology of PSWF waveform.Through simulation,this article verifies system performance,and determines the effects of pulse waveform and modulation multiple access to the system by applying comparative analysis.Secondly,because of sharing frequency band with narrowband system,UWB system will be bound to suffer from its interference.The paper analyzes several major forms of interference and their impact on the system.The interference would make the signal not be transmitted and received properly.By this method the system's BER performance is improved and system can transmit and receive signal properly and ensure the effectiveness of the system transfer at the same time.Third,the principle and application of soft spectrum adaptive technology are briefly analyzed.Based on this,three kinds of anti-jamming schemes are proposed for the system based on SSA.They are sub-band internal soft spectral adaptive,inter sub-band soft spectral adaptive and adaptive soft spectrum based on notch.The simulation analysis of each scheme is carried out,and the three schemes are proved to improve the performance of the system.And the paper compares the gap between the three scenarios.At last,by comparing several programs,this paper provides optional programs for UWB systems to coexist with narrowband systems.Through theory and simulation,this article provides feasibility study of multi-band UWB system model,proposes several feasible solutions to narrowband interference,analyzes these solutions by simulation and gets the performance characteristics of them.Also this paper provides a guideline for immunity characteristics of multi-band UWB.