深圳大学学报（理工版）
深圳大學學報（理工版）
심수대학학보（리공판）
JOURNAL OF SHENZHEN UNIVERSITY (SCIENCE & ENGINEERING)
2010年
1期
43-48
,共6页
解武%曹家年%刘世航%吕学龙
解武%曹傢年%劉世航%呂學龍
해무%조가년%류세항%려학룡
通信技术%超宽带%功率谱%IEEE 802.15.4a信道%多路径干扰%路径损耗
通信技術%超寬帶%功率譜%IEEE 802.15.4a信道%多路徑榦擾%路徑損耗
통신기술%초관대%공솔보%IEEE 802.15.4a신도%다로경간우%로경손모
communication technology%ultra wideband%power spectrum%IEEE 802.15.4a channel modeling%multipath interference%pathloss
研究超宽带功率谱密度,从路径损耗模型、多路径模型和小尺度衰落模型方面分析IEEE 802.15.4a工作组信道模型.采用直接序列脉冲(direct-sequence pulse-amplitude modulation, DSP-PAM)超宽带(ultra-wideband, UWB)系统的信道响应,仿真分析了8种信道对2~10 GHz超宽带系统功率谱分布情况. 仿真结果表明,多路径信道对UWB功率谱影响不大,脉冲UWB具有抗多路径干扰能力强的特点.
研究超寬帶功率譜密度,從路徑損耗模型、多路徑模型和小呎度衰落模型方麵分析IEEE 802.15.4a工作組信道模型.採用直接序列脈遲(direct-sequence pulse-amplitude modulation, DSP-PAM)超寬帶(ultra-wideband, UWB)繫統的信道響應,倣真分析瞭8種信道對2~10 GHz超寬帶繫統功率譜分佈情況. 倣真結果錶明,多路徑信道對UWB功率譜影響不大,脈遲UWB具有抗多路徑榦擾能力彊的特點.
연구초관대공솔보밀도,종로경손모모형、다로경모형화소척도쇠락모형방면분석IEEE 802.15.4a공작조신도모형.채용직접서렬맥충(direct-sequence pulse-amplitude modulation, DSP-PAM)초관대(ultra-wideband, UWB)계통적신도향응,방진분석료8충신도대2~10 GHz초관대계통공솔보분포정황. 방진결과표명,다로경신도대UWB공솔보영향불대,맥충UWB구유항다로경간우능력강적특점.
The impulse ultra-wideband (UWB) channels cover the frequency range from 2 to 10 GHz,in indoor residential,indoor office,industrial,and open outdoor environments.UWB communications systems share the spectrum with other systems in an unlicensed manner.This has caused a strict spectral constraint.In order to describe power spectrum distribution,the channel modeling subgroup of IEEE 802.15.4a was analysed from three aspects:the average pathloss,the power delay profile and the small-scale fading statistics.Theoretical analysis and simulation of the 2~10 GHz power spectrum distribution of UWB system wss described in detail.The power spectrum influence of 8 channels upon DS-PAM UWB system was analyzed.Simulation results show that the performance of UWB system is not deteriorated by multi-path channels,and the impulse UWB performs better in anti-multipath interference.
