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用户间UWB脉冲相互正交的THBPSK超宽带系统

, PP. 65-69

Keywords: 超宽带,Hermite函数,正交,跳时二相相移键控

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Abstract:

超宽带(UWB)系统中各用户通常使用同一种UWB脉冲发送数据,系统中存在多用户干扰,使系统误码率(BER)升高。为减小多用户干扰,以修正的Hermite多项式作为一组正交的UWB脉冲,提出了一种基于正交UWB脉冲的TH-BPSK(跳时二相相移键控超宽带系统),系统中每个用户使用的UWB脉冲互不相同,而且是相互正交的,由于UWB脉冲的正交性,在系统实现时隙同步的基础上,接收机可减小系统中的多用户干扰,系统的BER性能得到很大的提高。理论计算和仿真结果表明与系统中各用户仅使用一种UWB脉冲的TH-BPSK超宽带系统相比,提出的系统具有更低的BER。

References

[1]  Welborn M L. System considerations for ultra-wideband wireless networks[A]. IEEE RAWCON 2001[C]. Boston, MA:2001.5-8.
[2]  Win M Z, Scholtz R A. Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications[J]. IEEE Transactions on Communications, 2000,48(4):679-690.
[3]  Maggio G M,Rulkov N,Reggiani L. Pseudo-chaotic time hopping forUWB impulse radio[J]. IEEE Transactions on Circuits and Systems-1:Fundamental Theory and Applications,2001, 48(12):424-1435.
[4]  Eshima K,Hase Y,Oomori S,etc. M-ary system using walsh codes[A]. UWBST 2002[C]. Baltimore, MA: 2002.37-40.
[5]  Somayazulu V S. Multiple access performance in UWB systems using timehopping vs. direct sequence spreading[A]. IEEE WCNC2001[C]. Drlando, FL:2001.758-762.
[6]  Foerester J R. The performance of a direct-sequence spread ultra-wideband system in the presence of multipath, narrowband interference, and multiuser interference[A]. UWBST 2002[C]. Baltimore, MA: 2002. 87-91.
[7]  Durisi G,Benedetto S. Performance evaluation and comparison of different modulation schemes for UWB multiaccess systems[J]. IEEE International Conference on Telecommunications,2003,3:2187-2191.

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