在多带信号完全重构的基础上,推导出一种并行采样多带信号时重构插值函数的确定方法.此方法是根据多带信号的频谱特点将重构插值函数的确定转化为一次线性方程组的求解.通过实例验证了重构插值函数确定方法的有效性,并进一步得出了此方...在多带信号完全重构的基础上,推导出一种并行采样多带信号时重构插值函数的确定方法.此方法是根据多带信号的频谱特点将重构插值函数的确定转化为一次线性方程组的求解.通过实例验证了重构插值函数确定方法的有效性,并进一步得出了此方法获得重构插值函数可保证总采样频率最小.
Abstract：
Based on the perfect reconstruction of the multi-band signal, a computing method of reconstruction function is described. This reconstructing multi-band signal from parallel sampling. Computing of reconstruction is turned to solving of linear equations. Then the validity of computing method is proven by example, and a result that the reconstruction function assures the least total sampling rate is derived.展开更多
The detection performance is evaluated for our proposed analog multiuser receiver in Ultra-WideBand (UWB) transmitted-reference system. In the presence of dense multipath and multi-access signals,the performance analy...The detection performance is evaluated for our proposed analog multiuser receiver in Ultra-WideBand (UWB) transmitted-reference system. In the presence of dense multipath and multi-access signals,the performance analysis is difficult due to the complicated waveform of received impulse. We develop an approach to analyze the steady-state Signal-to-Interference-plus-Noise (SINR) of the detector output. The multipath-spread impulse is fitted to an exponentially decaying profile in the analysis. A closed-form expression of steady-state SINR is further deduced for the proposed Least Minimum Square (LMS) detector. The analysis is validated by simulations in Line-Of-Sight (LOS) and Non-Line-Of-Sight (NLOS) channel respectively. Based on the theoretical results,the multipath delay spread is employed to determine the optimal width of the integration window of the detector.展开更多
文摘在多带信号完全重构的基础上,推导出一种并行采样多带信号时重构插值函数的确定方法.此方法是根据多带信号的频谱特点将重构插值函数的确定转化为一次线性方程组的求解.通过实例验证了重构插值函数确定方法的有效性,并进一步得出了此方法获得重构插值函数可保证总采样频率最小.
Abstract：
Based on the perfect reconstruction of the multi-band signal, a computing method of reconstruction function is described. This reconstructing multi-band signal from parallel sampling. Computing of reconstruction is turned to solving of linear equations. Then the validity of computing method is proven by example, and a result that the reconstruction function assures the least total sampling rate is derived.
基金Supported by the Guangxi Natural Science Foundation (No.0731025, No.0731026)the Established Project by Guangxi Education Department (No.200808LX117)
文摘The detection performance is evaluated for our proposed analog multiuser receiver in Ultra-WideBand (UWB) transmitted-reference system. In the presence of dense multipath and multi-access signals,the performance analysis is difficult due to the complicated waveform of received impulse. We develop an approach to analyze the steady-state Signal-to-Interference-plus-Noise (SINR) of the detector output. The multipath-spread impulse is fitted to an exponentially decaying profile in the analysis. A closed-form expression of steady-state SINR is further deduced for the proposed Least Minimum Square (LMS) detector. The analysis is validated by simulations in Line-Of-Sight (LOS) and Non-Line-Of-Sight (NLOS) channel respectively. Based on the theoretical results,the multipath delay spread is employed to determine the optimal width of the integration window of the detector.
