在MATLAB并无直接指令可进行画圆，本程序是一个不错的画圆程序。-in MATLAB no direct instructions can be Circle, the procedure is a good Circle procedures.

画二维和三维箭头矢量，matlab工具包。直接调用。 This functin is used to draw 2D、3D-arrows. The size of arrow head is decided by the minimum distance between start and stop.-Two-dimensional and three-dimensional vector drawing arrows, matlab toolkit. Direct calls. Th

Matlab 模拟 CDMA 直接扩频。m序列生成矩阵为p(x) = 1 + x^5 + x^7 + x^8 + x^9 + x^13 + x^15。能画出每阶段的时域、频域图。-Matlab simulation of CDMA Direct Spread Spectrum. m sequence generated matrix for p (x) = 1+ x ^ 5+ x ^ 7+ x ^ 8+ x ^ 9+ x ^ 13+ x ^ 15. To draw each stage of t

（1）编程建立Gold序列，仿真Gold序列的波形； （2）仿真Gold序列的自相关和互相关特性。 （3）编程仿真直接扩频通信系统模型，画出扩频前后信号波形及频谱。((1) programming Gold sequence and simulating the waveform of Gold sequence; (2) the autocorrelation and cross correlation characteristics of the simulated Gold sequ