对接入电脑的电话ModEM监听。电话录音,来电弹屏
上传时间: 2013-12-09
上传用户:songrui
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
ARM7LPC2214上的ModEM,拨号上网功能,这些代码不是一般的人能够做的。
上传时间: 2013-12-06
上传用户:tfyt
dsPIC DSC Soft ModEM Library
上传时间: 2016-03-23
上传用户:1427796291
OFDM ModEM Applications • Digital Video Broadcast (DVB) • Digital Audio Broadcast (DAB) • Broadband Wireless Access (802.16x) • Wireless LAN (802.11x & HiperLAN) Orthogonal OFDM Sub-carriers Orthogonal Frequency Division Multiplexing (OFDM)
标签: Broadcast Digital 8226 Applications
上传时间: 2016-03-23
上传用户:cc1
通过at指令来控制gsm ModEM 拨打和接听电话
上传时间: 2016-03-26
上传用户:ayfeixiao
ModEM编程 本地机使用ATDT命令拨号,远程机设为自动响应方式,即可进入联机方式, 进行终端通信。 在联机方式下,按PageUp键上载文件,按PageDn键下载文件,Ctrl-O呼出主菜单,退出联机方式使用Ctrl-D键。退出终端仿真器使用EXIT命令。 主程序使用C语言编写。使用早期的C编译器可以进行编译。终端方式为VT100.
上传时间: 2014-01-22
上传用户:xz85592677
3、GF-2000W 外置式GPRS ModEM 用户指南 PDF文件,对开发GPRS的技术人员有一定参考价值.
上传时间: 2013-12-19
上传用户:sxdtlqqjl
5、GF-2000N GPRS ModEM 解决方案 PDF文件,对开发GPRS的技术人员有一定参考价值.
上传时间: 2016-03-29
上传用户:huannan88
4、GF-2000W 外置式GPRS ModEM 用户指南 PDF文件,对开发GPRS的技术人员有一定参考价值.
上传时间: 2014-01-02
上传用户:jennyzai