摘要
脉冲超宽带(I-UWB)系统采用时域宽度极窄的脉冲作为信息载体,占用的频谱极宽。在目前技术条件下,模/数转换器件是实现I-UWB全数字化接收机的难点之一。分析了量化阶数对检测I-UWB信号的影响,建立了理论模型,给出了UWB不同频谱规范下对应的仿真结果。结果表明过高的量化阶数对系统性能的改善并没有太大的贡献,4位A/D转换器就可以很可靠地检测出淹没在噪声和干扰中的I-UWB信号。
Based on short pulse carrier, I-UWB communication system occupies an ultra-wide frequency band. Even with the most modem processing technologies, the analog digital converter is one of the difficulties in realizing I-UWB digital receiver. This paper analyzes the impact of the lack of quantitative order to detection of I-UWB signal. And a theoretical model and simulation results under different spectral masks are given. It is demonstrated that high quantization order has little contribution to improve system function, a 4-bit A/D converter is sufficient for reliable detection of an I-UWB signal swamped in the noise and interference.
出处
《无线电工程》
2008年第2期20-22,共3页
Radio Engineering
基金
国家自然科学基金重点项目(60432040)
