取得GSM基站信息的程序NiceTrack以及源代码
上传时间: 2014-01-13
上传用户:ryb
GSM的短信PDU编码功能的应用,ARM ADS1.2开发环境上的C程序
上传时间: 2014-10-28
上传用户:whenfly
GSM信令流程描述, 漫游、主叫、被叫等。
上传时间: 2014-01-18
上传用户:er1219
单片机DS18B20实时温度监控系统, 电力报警模块! GSM语音短信息报警模块! GSM远程短信息IO
上传时间: 2013-12-22
上传用户:恋天使569
TC35i新版西门子工业GSM模块是一个支持中文短信息的工业级GSM模块,工作在EGSM900和GSM1800双频段,电源范围为直流3.3~4.8V ,电流消耗——休眠状态为3.5mA,空闲状态为25mA,发射状态为300mA(平均),2.5A峰值;可传输语音和数据信号, 功耗在EGSM900(4类)和GSM1800(1类)分别为2W和1W ,通过接口连接器和天线连接器分别连接SIM卡读卡器和天线。SIM电压为3V/1.8V,TC35i的数据接口(CMOS电平)通过AT命令可双向传输指令和数据,可选波特率为300b/s~115kb/s , 自动波特率为1.2kb/s~115kb/s。它支持Text和PDU格式的SMS(Short Message Service,短消息),可通过AT命令或关断信号实现重启和故障恢复
上传时间: 2016-03-17
上传用户:a3318966
GSM和GPRS应用 vc 代码 !
上传时间: 2013-12-25
上传用户:Pzj
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