UWB-LFM-signal

说明：  合泰最新版触摸库，可直接调用，BS83.....(Including the design of the module and HCI and antenna)

迷宫的flash程序,动态演示出入栈的操作,对下正在学数据结构的同学有帮助(Labyrinth flash procedures, dynamic demonstration of the operation of stacks, for students who are learning data structure is helpful)

Abstract—In this paper, we study the joint estimation of inphase and quadrature-phase (I/Q) imbalance, carrier frequency offset (CFO), and channel response for multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems using training sequences. A new concept called channel residual energy (CRE) is introduced. We show that by minimizing the CRE, we can jointly estimate the I/Q imbalance and CFO without knowing the channel response. The proposed method needs only one OFDM block for training and the training symbols can be arbitrary. Moreover when the training block consists of two repeated sequences, a low complexity two-step approach is proposed to solve the joint estimation problem. Simulation results show that the mean-squared error (MSE) of the proposed method is close to the Cramer-Rao bound (CRB). Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel estimation.

信号进入信道，经过高斯噪声的干扰，经过QPSK调制以后的时延 (The signal enters the channel, after the interference of the Gaussian noise after a delay after the QPSK modulation)

Smoothing Filter-based Intensity Modulation a spectral preserve

3抽头迫零均衡器，5抽头迫零均衡器，以及恢复信号波形(3-tap zero forcing equalizer, the 5-tap zero forcing equalizer, and the restoration of the signal waveform)

基于MATLAB平台的通信系统的仿真，RS编码，OFDM调制，加入PLC信道噪声，并进行误码率的检测，运行无误，程序完整。(MATLAB-based communications system simulation platform, RS coding, OFDM modulation, adding PLC channel noise, and make BER testing, run correctly, the program integrity.)

说明：  OFDM系统仿真 ----比较OFDM系统的IDFT/DFT实现与模拟调制实现仿真代码，其中假设OFDM系统包含8个子载波，fc=1 Hz，子载波频率间隔为1 Hz，每个子载波采用4-QAM调制，符号周期为1秒(OFDM IDFT/DFT 4-QAM FFT/IFFT)

实现电力线通信信道建模及其基于OFDM调制系统环境下仿真。(Power line communication channel modeling and simulation of OFDM system)

无源传感器网络的分布式能量自适应最小化延迟调度(Distributed Energy Adaptive Minimization Delay Scheduling for Passive Sensor Networks)