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Research on the Coexistence of Communication Systems Based on UWB

Author: MengBo
Tutor: TianHongXin
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Ultra-Wideband Interference suppression Coexist Cognitive ultra-wideband
CLC: TN925
Type: Master's thesis
Year: 2009
Downloads: 96
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Abstract


Ultra-wideband (Ultra-Wideband, UWB) communication is for short-range wireless communications technology has great potential to solve UWB communication system is widely compatible with existing types of wireless communication system between the UWB Communications premise and foundation . In this paper, the mutual interference between UWB system with traditional narrowband communication system , comparative analysis of three representative interference suppression technology , a MC-CUWB (Multiple Channel-Cognitive UWB) communication system solutions , and program simulation . The main study outcomes : 1 . Analysis of the mutual interference between UWB communication system with traditional narrowband communication system , and the system performance simulation . Simulation results show that : the wider the bandwidth of the narrowband system , the higher the transmission power , UWB system is affected by more serious ; under the conditions of a lower transmission power , UWB system does not substantially impact on the performance of traditional narrowband system . Discussed three typical narrowband interference suppression techniques , and build UWB communication interference suppression technology based on these three programs , effective systems coexist . The analysis and simulation results show that : the interference suppression based on SSA waveform design method for optimal performance , the band position , bandwidth narrowband interference signals need to be known a priori information in the application ; notch frequency domain performance better than the method based on SVD decomposition but its scope is limited ; simple method based on frequency domain notch , but does not apply to the wide bandwidth of interference due to some damage to the signal . 3 , a communication system of MC-CUWB . The system can be designed to adaptively adapting radiation masking changes transmit pulse waveform ; the design method of the multi-channel interference can be dispersed into the respective sub- band flexibly , the pulse width of broadening also reduces the resolution requirements of the system time ; TR transmission mode to avoid channel estimation and receiving end of the adapter pulse reconstruction . Theoretical analysis and simulation results show that : This program can effectively achieve UWB systems coexist with other systems in the spectrum , relative to the the common UWB system has many advantages .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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