A system simulation environment in Matlab/Simulink of RFID is constructed in this paper. Special attention is emphasized on the analog/RF circuit.Negative effects are concerned in the system model,such as phase noise of the local oscillator,TX-RX coupling,reflection of the environment, AWGN noise,DC offset,I/Q mismatch,etc.Performance of the whole system can be evaluated by changing the coding method,parameters of building blocks,and operation distance.Finally,some simulation results are presented in this paper.
標(biāo)簽： environment constructed simulation Simulink
上傳時(shí)間： 2014-01-09
上傳用戶：zhangliming420
是MATLAB關(guān)于c\c++的使用和應(yīng)用（英文）。
上傳時(shí)間： 2013-12-16
上傳用戶：cazjing
通過SPI接口，同RF傳輸芯片CC2500的通訊代碼
上傳時(shí)間： 2015-11-26
上傳用戶：youke111
讓您通過VB介面，簡易地測試8051上面的40Hz的RF通訊。
標(biāo)簽：
上傳時(shí)間： 2014-01-07
上傳用戶：gundamwzc
本程序通過系統(tǒng)調(diào)用stat讀出文件大小屬性，并顯示輸出。 linux文件系統(tǒng)調(diào)用 編譯命令：cc dir.c 運(yùn)行命令：./a.out
標(biāo)簽： stat 程序 系統(tǒng)調(diào)用
上傳時(shí)間： 2015-12-27
上傳用戶：tzl1975
Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.
標(biāo)簽： synchronization Carrier-phase multiplicativ approached
上傳時(shí)間： 2013-11-28
上傳用戶：windwolf2000
學(xué)會(huì)對文件的記錄鎖定，及解鎖。#include <stdio.h> #include <unistd.h> #include <fcntl.h> int main() { int fd int i struct { char name[20] uint ID int age } myrec fd =open("name", O_RDWR|O_CREAT, 0755) if (fd == -1) return -1 printf("Input your name:") scanf("％s", myrec.name) printf("Inpute your ID :") scanf("％d", &myrec.ID) printf("Input your age :") scanf("％d", &myrec.age) lseek(fd, 0,SEEK_END) lockf(fd, 1, 0) write(fd, (void *)&myrec, sizeof(myrec)) lockf(fd, 0 ,0) return 0 } 執(zhí)行命令cc lock.c –o lock.out Chmod +x lock.out ./lock.out
標(biāo)簽： 記錄
上傳時(shí)間： 2016-01-04
上傳用戶：亞亞娟娟123
Nordic 公司 nRF24E1 芯片程序，包含RF,Timer,UART中斷，是極好的參考資料
上傳時(shí)間： 2013-12-27
上傳用戶：familiarsmile
在這篇文檔中，將以C/C++的源碼作為我們基礎(chǔ)，所以必然涉及一些關(guān)于C/C++的編譯的知識(shí)，相關(guān)于這方面的內(nèi)容，還請各位查看相關(guān)的編譯器的文檔。這里所默認(rèn)的編譯器是UNIX下的GCC和CC。
標(biāo)簽： 文檔
上傳時(shí)間： 2016-01-13
上傳用戶：chenjjer
數(shù)據(jù)結(jié)構(gòu)（c\c++)1800例題與答案,值得一看
標(biāo)簽： 1800 cc 數(shù)據(jù)結(jié)構(gòu)
上傳時(shí)間： 2014-11-29
上傳用戶：181992417
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