etherlabmaster-code.tar

Simulation 16QAM-OFDM with mmeory Polynomial PA (Simulation 16QAM-OFDM with mmeory Polynomial PA)

说明：  SAR雷达的BP后向投影成像，可运行出结果(The BP back projection imaging of SAR radar can run the result)

STM8S - for new member

说明：  大规模天线检测，运用近似消息传递算法，仿真实验(Massive MIMO detection by implement AMP)

频分复用信号的生成以及演示，与英文工具书匹配，很好用！(FDM signal generation)

程序使用了自相关性和互相关性较好的gold码作为扩频序列，直扩，扩频增益设置为31，模拟用户数为4(Program uses a self-correlation and cross-correlation of the better gold code as spreading sequence, direct expansion, spreading gain is set to 31 to simulate the number of users of 4)

conversion of a matrix into lower triangular matrix

Multiple input multiple output techniques combined with orthogonal frequency division multiplexing (MIMO-OFDM) provide a promising approach for wireless systems. However, a serious drawback of the OFDM system is the high peak-toaverage power ratio (PAPR), which may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple method to reduce the PAPR of MIMO-OFDM signals based on the use of unused subcarriers. Instead of processing the signals at each transmitter separately, a peak cancelling signal is generated at one antenna and is then applied to all the others with only simple modifications. Simulation has shown that a minimum 2 dB reduction in PAPR can be achieved for all transmit signals using this approach. As the signal processing is nearly all done at a single transmitter, repetition of the operations at each transmitter is avoided, and therefore the overall cost of the system can be significantly reduced.

说明：  mimo相关编程，无线网络中的MIMO，(MIMO (Toolbox) Package)

OPTICAL COMMUNICATIONS MATLAB calls OptiSystem CO-OFDM.