chuanbuzixitong

Phase-shift keying (PSK) is a method of digital communication in which the phase of a transmitted signal is varied to convey information. There are several methods that can be used to accomplish PSK.

buck电路，元器件是IGBT，最简单的实例(buck circuit, components are IGBT, the simplest example of)

冲击理论指的是计算结构响应的风动荡。这里,结构是一个吊桥,使用连续梁的理论建模。介绍模态耦合模型，尽可能的简单计算横向,纵向和扭转响应。结构的方法是使用。是专为那些已经拥有一些知识领域的随机振动分析和对结构风荷载。(The buffeting theory [1,2] refers to the computation of the response of a structure to wind turbulence. Here, the structure is a suspension bridge, modeled using the theory of continuous beam [3]. The frequency domain approach is used. I did not introduce modal coupling to keep the model as simple as possible. The present script computes the lateral, vertical and torsional response. A multi-modes approach is used. This script is designed for those who already have some knowledge in the field of random vibration analysis and wind loading on structures. )

由于Matlab软件的网络通信局限,使得在并行时域有限差分( FDTD)计算仿真中,难以实现子域间的消息发送与接收操作(As the Matlab software, network communications limited, so in parallel finite difference time domain (FDTD) simulation calculation, it is difficult to achieve sub-domain of the message and receive operation)

gmsk通信系统的matlab仿真程序，可参考使用(GMSK communication system of matlab simulation program)

生物力学血管树计算阻抗，准确无误，哈哈哈哈哈(The biomechanics vascular tree calculation)

example caculartor guide using matlab

Snake模型和GVF Snake模型的程序，包括2D和3D实现。(Snake model and GVF Snake model procedures, including 2D and 3D.)

QPSK modulation system with recover loops(This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. The transmitter?s symbol period is T and set to a value of 100 ms. The symbol period at the receiver is Tr. The model will produce six windows: Two constellation plots and two eye diagrams (for the real part only), at the output of the matched fi lters and after the recovery loops a plot of the phase error (output of the NCO) and a plot of the fractional timing error (used in the interpolator). The frequency off set at the receiver is denoted by deltaf. The model simulates the transmission of 8000 QPSK symbols.)

cnv_encd.m　卷积编码程序 viterbi.m　　卷积译码程序 其它的是viterbi.m中用到的子函数(cnv_encd.m convolution coding procedures viterbi.m other convolution decoding process is used in viterbi.m Functions)