langnun_v69

We compare the energy efficiency of some transmission schemes in wireless sensor networks. By constraining the system to end-to-end throughput requirements, we assume that the nodes in multi-hop and cooperative schemes operate at a spectral efficiency which is twice that of the single-hop transmission. By taking into account the energy consumption of the RF circuitry, we show that cooperation may be considerably more energy efficient than non-cooperative schemes even in small transmission ranges, specially if a feedback channel is available.

this file simulates encoding turbo by using matlab

线性调频信号的分数阶傅里叶变换，完整可用。分数阶傅里叶变换采用Pei采样算法，在傅里叶域呈现宽带特性的线性调频信号，在分数阶域呈现窄带特征。(The fractional Fourier transform of linear frequency modulation signal, available. fractional Fourier transform using Pei s sampling algorithm, in Fourier domain present broadband characteristics of linear frequency modulation signal, the fractional domain present narrowband feature. )

通过程序描述了一个浅海的地形声速剖面信息，在彩色图上画出(that give an example of SSP information)

RequestWrapper extends AbstractHttpMessage implements HttpUriRequest.

用来描述铁电存储器MFIS-FET结构的C-V（即电容-电压）关系(Used to describe the ferroelectric memory MFIS-FET structure of CV (ie capacitance- voltage) relationship)

shape context的MATLAB一个Demo，好像是从原作者网站上下下来的(shape context of MATLAB a Demo, seems to be down from the original author site down)

用Matlab神经网络实现的字符识别。可借鉴于数字识别等。(Matlab neural network of character recognition.Can be for reference in digit recognition, etc.)

The program simulates convolutional code using soft-decoding viterbi algorithm. The choice of generator matrix (G) determines the code rate (1/R) and constraint length of the code (K).

说明：  利用matlab仿真的数字调制技术之BPSK调制源程序(The BPSK modulation )