OQAM OFDM Perfect

First, when the inter-user distance d is small, the SNR for D2D communication is high, and hence there are sufficient number of bits for high quality CSI exchange.

计算矩形栅格或三角栅格阵列天线栅瓣图，优化天线单元间距设计(caculate grating lobes of rectangular grid or triangular grid array)

适应多个模式的rs编码，Verilog，选择对应的多项式(RS coding adapted to multiple modes.)

说明：  51单片机MODBUS主机通信程序，平台KEIL4。使用MODBUS SLAVE测试成功。(51 MCU MODBUS host communication program, platform KEIL4. The MODBUS SLAVE test was successful.)

利用Matlab实现的二维TDOA定位算法仿真程序。。(2D TDOA algorithm implemented by Matlab simulation program. .)

多个信道模型仿真模型MATLAB源码，包括自由空间路径损耗函数、Okumura-Hata模型、COST231-WI视距模型、COST231-WI非视距模型、Rayleigh信道及COST-231 Hata模型等。(Multiple chanel model simulation with MATLAB code, include wireless_free_space_attenuation model, Okumura-Hata model, COST231-WI LOS model, COST231-WI NLOS model, Rayleigh model, etc al.)

HLP A+ Modbus 标准通讯协议格式，上位机发送数据格式，正确时变频器返回数据格式(This bit will be set to logic 1 when the receive buffer has been read and contains no new information. If there is new information available in the receive buffer that has not been read, this bit will return to logic 0. RXBMT = 1 when in Master Mode.)

说明：  平方根升余弦滤波器作为发送滤波器和匹配滤波器，使用python语言。(Make the square root rise cosine filter as a send filter and a match filter, using the python language.)

In this paper, we present and analyze efficient frame synchronization and frequency offset compensation scheme with ternary sequences for an orthogonal frequency division multiplexing (OFDM) system in Rayleigh fading channels. Frame synchronization is an essential procedure for normal operation of the OFDM system because of sensitivity to synchronization errors. And when there are frequency offsets in OFDM frame, the loss of orthogonality occurs and the interference problem among several subcarriers is introduced. These fact leads to the requirement for joint implementation of the frame synchronization and frequency offset compensation.

Chuong trinh ve do thi buc xa cua anten day va anten mang (theo dang 2D va 3D)