TD_XY2-100_R0703

带SPI接口的独立以太网接口控制器，支持全双工和半双工模式，高速SPI接口(Independent Ethernet interface controller with SPI interface, support for full-duplex and half-duplex mode, high-speed SPI interface)

spectrum cellular networks

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.

Problems and their solutions

该程序实现水声信道的模拟方法及性能分析，提出了一种信的水声信道模型(The program implements underwater acoustic channel simulation methods and performance analysis, presents a letter of underwater acoustic channel model)

说明：  S7200 通过modbus 通讯与多块表通讯 定时轮询(Reading multi block instrument timing polling)

performance evaluation of reactive and proactive protocols. the performance is evaluated with respect to throughput over TCP and UDP connections types

MATLAB仿真软件在通信系统仿真中的应用(MATLAB simulation software in the communication system simulation)

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

optimal coverage problem of wireless sensor network