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UWB pulse generation system by cardinal spline fucnctions

采用基数样条函数的 UWB 脉冲生成系统

基本信息

批准号：
17560357
负责人：
KAMADA Masaru
金额：
$ 1.5万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

The purpose is to construct a pulse in terms of the cardinal spline function that is generated through a linear dynamical system so that the pulse be useful for the Uitra-Wide Bandwidth (UWB) wireless communications systems. In 2005, we derived a systematic method to determine biorthogonal and orthogonal pulses for the use in the base-band channels. Via a pair of antennas the transmitted pulses are received as their second derivative with respect to time. Therefore, we have to integrate the transmission pulses twice in advance of their transmission or, in exchange, we have to integrate the template pulses twice before correlation in order to exploit the orthogonal property in detection of the received pulses. In 2006, we derived a different. Type of pulses that are orthogonal to their own second derivative. Then it became possible to detect the received pulses simply by correlation with the template pulses. Besides, this orthogonality is equivalent to that the first derivatives of the pulses are mutually orthogonal. That means additive noises superimposed on the first derivative, which is supposed to be the radio wavefrom, are most suppressed in the sense of least-square estimation. In 2007, we obtained a practical pulse of which Fourier characteristics fit well within the spectral mask that the U. S. Federal Communications Commission imposed on the UWB communications systems for indoor use.

其目的是根据线性动力系统产生的基数样条函数来构造脉冲，以便该脉冲可用于超宽带(UWB)无线通信系统。2005年，我们推出了一种系统的方法来确定基带信道中使用的双正交脉冲和正交脉冲。通过一对天线，发射的脉冲作为其关于时间的二阶导数被接收。因此，我们必须在传输脉冲之前对其进行两次积分，或者作为交换，我们必须在相关之前对模板脉冲进行两次积分，以便在检测接收到的脉冲时利用正交性。2006年，我们衍生出了一个不同的。与其自身的二阶导数正交的脉冲类型。然后，可以简单地通过与模板脉冲相关来检测接收到的脉冲。此外，这种正交性等价于脉冲的一阶导数相互正交。这意味着叠加在一阶导数上的加性噪声在最小二乘估计意义上被最大限度地抑制，一阶导数应该是无线电波的来源。2007年，我们获得了一个实用的脉冲，其傅里叶特性非常符合美国联邦通信委员会对室内使用的UWB通信系统施加的频谱掩模。