Space - time processing technique combines time domain signal processing and spatial signal processing . it can utilize fully the space - time channel characteristic , repair limits of the time domain signal processing and spatial signal processing , and enhance the system capability , overlay area and transmission rate 空时处理技术联合时域和空域信号处理技术,充分利用无线信道的空时结构特征,弥补了时域信号处理和空域信号处理二者的局限,能够提高无线通信系统的容量、覆盖范围和传输速率。
Ripi combines time optimal controller with pi controller , it is a kind of intelligent controller based on rules . within the large error range , ripi uses time optimal control , and within the small error range , it uses pi controller . by the state point , two schemes change each other Ripi将时间最优控制基本原理与pi相结合,是一种基于规则的智能控制器,该控制器在大偏差的范围内使用时间最优控制,在小偏差范围内采用pi控制,两种控制方法的切换是利用状态点进行切换。
Based on the characteristic of wavelet and fractal an algorithm of image compression using wavelet transform and fractal quadtree is presented . this algorithm combine time domain ' s fractal quadtree compression method with wavelet transform compression method . the results show that the algorithm approach might be able to improve vision effection because wavelet transform is used to enhance image ' s self - similar used by fractal method 在基于小波变换的图像压缩研究中首先提出一种将神经网络、矢量量化相结合的小波域图像压缩算法,然后又提出一种基于四叉树的小波域分形图像压缩算法,将时域四叉树分形压缩算法与小波域小波树压缩算法相结合,充分利用两者的优点,减少了通常图像由于自相似性不强而存在的分形压缩效果不佳的现象。