This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray c

空时编码方向毕业论文（原创）,空时编码的4元素的正交和分正交都有所写到！-Space-time coding the direction of thesis (original), space-time coding of the four elements of the orthogonal and sub-orthogonal have written to!

一种多波束阵列天线系统发射通道幅相误差环路校正方案。采用了经过空域DFT变换的m/WH复合正交码作为校正测试信号。-A multi-beam array antenna system loop transmit channel amplitude and phase error correction scheme. After airspace using DFT transform m/WH complex orthogonal code as calibration test signal.

CDMA and OFDMA are the multiple access techniques for the next generation wireless communication systems. In 3G systems CDMA is used and in 4G OFDMA technique is used. Recently in 3G systems Wideband Code Division Multiple Access (WCDMA) is used beca