摘要
为了使变换域通信系统(TDCS)能够对窄带干扰频率进行精确定位,提高生成的基函数的频带利用率,提出了一种基于小波包变换的基函数生成方法.该方法采用树结构算法对信号进行分解,准确判断出窄带干扰的频率位置,改善了有用频带被过多剔除的情况.仿真结果表明,采用该方法的变换域通信系统比采用其他方法的变换域通信系统具有更强的干扰抑制能力和更好的自适应性.
In order to accurately determine the narrow width interference freguency and raise the usage rate of generated basis function with transform domain communication system（ TDCS）, a method for generation of basis function is proposed based on wavelet packet transformation. By using tree structure algorithm （TSA） to decompose signals, this method can accurately determine the position of interference frequency, improving the useful bands from being rejected. Simulation shows that TDCS in this method possesses stronger capability to suppress interference and better adaptability than TDCS in other methods.
出处
《应用科技》
CAS
2007年第2期13-16,共4页
Applied Science and Technology
关键词
变换域
窄带干扰
小波包变换
基函数
transform domain
narrow-band interference
wavelet packet transformation
basis function
