This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report
标签： communication computers software wireless
上传时间： 2014-05-29
上传用户：wangdean1101
我刚完成的基于Quartus Two 开发环境全部用Verilog硬件描述语言编译无误的MSK调制解调器
上传时间： 2016-04-14
上传用户：CHINA526
This belongs to the correspondence principle topic, the topic is under two kind of channels the 2psk system analysis
标签： the topic correspondence principle
上传时间： 2013-12-19
上传用户：edisonfather
This Two-Category Classifier Using Discriminant Functions to separeate two classes. The Classifier is designed on classes which has two feature vectors and other case it has one feature vector.
标签： Classifier Discriminant Two-Category Functions
上传时间： 2016-04-23
上传用户：2525775
Video for linux head two 的视频采集示例，是V4L的升级版，在Linux下编译即可，是Linux下图像采集编程的API
上传时间： 2013-12-22
上传用户：zsjinju
This file set two employees information and print them out and tell today is whose borthday.
标签： information employees and borthday
上传时间： 2016-05-06
上传用户：yoleeson
1,Check data in two files and report the error 2,Calculate the pay and report.
上传时间： 2016-05-06
上传用户：wanghui2438
Thinking in c++ vol one and vol two 相当不错的两本书，一本是基础是一本进阶，附带源码
上传时间： 2016-05-07
上传用户：dapangxie
There are two files in the zip folder. bpsk_spread.m and jakesmodel.m Steps for simulation: 1] Run jakesmodel.m first 2] Then run bpsk_spread.m . 3] Note that during the first run bpsk_spread.m has no rayleigh fading.This is because the corresponding code has been commented 4] The resulting performance is stored in BER_awgn. 5] Now uncomment the Rayleigh Fading code in bpsk_spread.m file. 6] Same time comment BER_awgn (line 112) and uncomment BER_ray variable. 7] Run the simulation. To compare the perfromances of the receiver using DSSS plot the BER_awgn and BER_ray
标签： bpsk_spread jakesmodel simulation folder
上传时间： 2016-05-19
上传用户：ynsnjs
快速傅里叶变换（FFT）算法。FFT - Fast Fourier transform. The length of X must be a power of two, for a fast radix-2 fast-Fourier transform algorithm is used
标签： FFT transform Fourier length
上传时间： 2013-12-19
上传用户：sy_jiadeyi
