摘要
针对超宽带载波包络调制的频谱特性,提出新颖的正交梳状频谱相关解调方法,将超宽带脉冲信号的处理从时域扩展到了频域。阐述了该解调方式的基本原理和设计思路,推导了正交梳状频谱的载波选择原则。对系统性能的分析和仿真证明了频域相关解调的方法有着和时域解调相同的误码率性能。该方法接收机结构简单、成本低,可由全数字电路实现,便于采用其它数字信号处理技术进一步提高系统性能。
Considering the frequency spectrum characteristics of the UWB Carrier Envelope Modulation（ UWB CEM） scheme, a novel Orthogonal Comb Spectrum Correlation Demodulation Method is presented in this paper, which transforms the UWB signal processing from time domain to frequency domain. The UWB Binary Orthogonal Carrier Envelope Modulation （BOCEM） is applied as an example to show the realization of the Orthogonal Comb Spectrum Correlation Demodulation system. In order to satisfy the condition of orthogonal comb spectrum ,the carrier frequency selection criteria is also discussed. The performance analysis and simulation results not only show the feasibility of the new demodulation scheme, but also prove that it has the same BER performance as the demodulation method in time domain. Comparing with the demodulation scheme in time domain, the new demodulation scheme has a simpler structure, and can be implemented in form of all digital circuit without RF comber filters. Furthermore, it is convenient to improve the system performance by using the other digital signal processing alzorithms.
出处
《无线电工程》
2007年第7期10-13,共4页
Radio Engineering
基金
国家自然科学基金项目(60432040
60572020
60572158)
北京市自然科学基金项目(4052021)
韩国仁荷大学IT研究中心项目(INHAUWB-ITRC)
关键词
超宽带
载波包络调制
频域相关解调
冲激脉冲超宽带(IR—UWB)
Uhra-Wideband （ UWB ）
Carrier Envelope Modulation （ CEM ）
spectrum correlation demodulation
Impulse Radio UWB（IR- UWB）
