knn(带数据)

实现基于STBC的MIMO_OFDM通信系统在不同信噪比情况下接收端的误比特率的仿真。发射端包括基于基带调制、空时编码、导频插入、IFFT、串并合并以及添加循环前缀；接收端包括去除循环前缀、取出导频估计信道、FFT运算以及并串合并，空时解码等。仿真中采用QPSK、空时编码采用4*3的复正交空时编码矩阵。OFDM子载波数为100，每个子载波传输66个符号，每个符号2比特。IFFT长度为512个符号。发射天线为3个接收天线为2个。(The BER simulation of MIMO_OFDM communication system based on STBC under different SNR is realized. The transmitter includes baseband modulation, space-time coding, pilot insertion, IFFT, serial-parallel combination and adding cyclic prefix; the receiver includes removing cyclic prefix, extracting pilot estimation channel, FFT operation, parallel-serial combination, space-time decoding, etc. The complex orthogonal space-time coding matrix is used in QPSK and space time coding in 4*3. The number of OFDM subcarriers is 100, and each subcarrier transfers 66 symbols with 2 bits per symbol. IFFT is 512 symbols in length. The transmitting antenna is 3 receiving antennas, 2.)

A simple lan network chat.

说明：  基于matlab函数对模拟信号的调制，可以熟悉的掌握用matlab对模拟信号的调制、解调。(Matlab function-based modulation of the analog signal can be familiar with the master using matlab analog signal modulation, demodulation.)

说明：  实现了3GPP 38.901中基础的信道(basic realization of 3GPP 38.901 channel model)

QPSK调制matlab程序 包括基带成型滤波器 （升余弦滤波器）(QPSK modulation Matlab procedures including baseband shaping filter (or cosine filter))

vectors 16 向量重新影射 一次引导，2次引导

最大比合并（MRC）的分集合并程序；调制方式BPSK;瑞利信道(The diversity merging program of the maximum ratio combination (MRC); modulation mode BPSK; Rayleigh channel)

OFDM系统在QPSK与16QAM调制下，误码率比较程序，希望对大家有一定用处(OFDM system with 16QAM QPSK modulation, error rate procedures, We hope to have some use)

利用单辅助阵元法实现对雷达到达方向角估计中的幅相误差校正(Amplitude and Phase Error Correction of Radar Direction of Arrival Estimation Using Single Assistant Array Method)

OFDM 同步技术研究 Schmidl_Cox算法 定时估计加频偏估计 matlab程序(The the OFDM synchronization technology research Schmidl_Cox algorithm timing and frequency offset estimation matlab program is estimated)