PPPOEchangjianguzhangdaima

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.

基带脉冲成形数字滤波器的MATLAB设计与DSP上的实现(shaping filter and dsp realize theory )

NS中文手册，不用多说，有兴趣的朋友都知道。找了很久终于找到了，很不错，感谢作者辛苦努力和无私奉献！(NS Chinese manual, Needless to say, friends who are interested to know. Looking for a long time finally found, it is good to thank the author of hard work and selfless dedication!)

This book is very nice for designing a wireless network which describes in details how the wireless systems are designed.

HART协议解析，非常完整，定能加快研发进度。(HART agreements, some of the information, in the hope that everyone has to help)

zigbee的一些基础知识，引脚及其相关协议等(basic zigbee )

关于polar codes的源码，简单的仿真。(An Brief Introduction to Polar Codes)

介绍如何对NS2进行多信道多接口扩展，并支持动态信道分配。(NS2 introduce how to carry out the expansion of multi-channel multi-interface, and supports dynamic channel allocation.)

There are some trials for DOA estimation by applying the wavelet transform method into several sub bands MUSIC and CYCLIC MUSIC scenarios

西門子CNC系統編程代碼表,對初學者幫助很大(Siemens CNC system control code )