摘要
Chirp超宽带(UWB)具有低功耗、低成本、高处理增益等优点。但是由于面临具体实现、频带效率以及多径环境等一系列问题,基于Chirp超宽带的多址技术受到很大的限制。本文提出的一种基于Chirp码的多址方案,就是利用Chirp码的正交性以及准正交性来减少多址干扰(MAI)。该方案在多径环境的仿真结果中,接收端采用最大比合并方式,所有径合并后系统性能得到明显改善。
Chirp UWB is with the ability of low power consumption ,low cost and high processing gain. The multiple-access technology is limited because of implementation,bandwidth efficiency and multipath channel. A new multiple-access code scheme is proposed in this paper. To mitigate the mutiple access interference（MAI）, orthogonal and quasi-orthogonal between Chirp code is used. We also derive the error performance of the proposed scheme in the mutiple path enviroment.
出处
《桂林电子科技大学学报》
2010年第1期13-16,共4页
Journal of Guilin University of Electronic Technology
基金
广西自然科学基金(0991018Z)
关键词
Chirp扩频
超宽带
多址
多径
chirp spread spectrum
UWB
mutiple access
mutiple path
