This code was used to produce simulation results described in:
Using Directional Antennas to Prevent Wormhole Attacks
Lingxuan Hu and David Evans. Network and Distributed System Security
Symposium, San Diego, 5-6 February 2004.
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.
f your application uses MFC in a shared DLL, and your application is
in a language other than the operating system s current language, you
will need to copy the corresponding localized resources MFC42XXX.DLL
from the Microsoft Visual C++ CD-ROM onto the system or system32 directory,
and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation.
For example, MFC42DEU.DLL contains resources translated to German.) If you
don t do this, some of the UI elements of your application will remain in the
language of the operating system.
Hidden_Markov_model_for_automatic_speech_recognition
This code implements in C++ a basic left-right hidden Markov model
and corresponding Baum-Welch (ML) training algorithm. It is meant as
an example of the HMM algorithms described by L.Rabiner (1) and
others. Serious students are directed to the sources listed below for
a theoretical description of the algorithm. KF Lee (2) offers an
especially good tutorial of how to build a speech recognition system
using hidden Markov models.
『embedded systems building blocks, complete and ready-to-use modules in C, second edition』
- This second edition features revisions that support the latest version of the author s popular operating system and book, MicroC/OS-II - Complete and ready-to-use modules in C Get a clear explanation of functional code modules and microcontroller theory
jobo, famous crawler open source which is implemented by java.
used in many big websites.
You will need a Java Runtime Environment 1.3 or later (on many
System Java 1.2 is installed, it will NOT work !).
find the information about a host with the DNS retrieving system calls, such as gethostbyname() and gethostbyaddr().
(2) All the required information are in the hostent structure.
(3) All the aliases and IP addresses of the host is stored in the hostent structure using linked list (鏈表).
This program shows the distributions of the co-channel interference in forward and reverse link in the cellular mobile system with cluster size N, when the mobile subscriber (MS) is at random positions of a cell.
CANopen is a networking system based on the CAN serial bus.
CANopen assumes that the device’s hardware has a CAN transceiver
and CAN controller as specified in ISO 11898.
CANopen profile family specifies standardized communication
mechanisms and device functionality. The profile family is available
and maintained by CAN in Automation (CiA), the international users’
and manufacturers’ group and may be implemented license-free.
基于OFDM的無線寬帶系統仿真It contains mainly two parts, i.e. link-level simulator and system-level simulator.
Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx. Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. SNR mapping table, that can be used for the system-level simulation.
System-level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural SNR, and finds the corresponding error rate.
