No BSD License  

Highlights from
BPSK Simulator for Low Rate Transmisions

3.77778

3.8 | 10 ratings Rate this file 27 Downloads (last 30 days) File Size: 2.14 MB File ID: #5054
image thumbnail

BPSK Simulator for Low Rate Transmisions

by

 

01 Jun 2004 (Updated )

BPSK Simulator for didactical purposes. Systemic coding style.

| Watch this File

File Information
Description

Presentation Layer: TXT to binary and viceversa
Link Layer: CRC + Interleaving and viceversa
Physical layer: IQ modulation. Coherent demodulation. Carrier recovery using square loop.
 
  On base band it is also implement a phase sinchronism system in order to project bit energy only on one carrier (I). This system is useful only on IQ demodulators, but this is not the case, so this module is not integrated on the system. You can test it with some test signals, that are include.
 
  Some GUI validation are not fine, you can depure those things if you consider this system useful. Many features should be updated.
 
 IMPLEMENTATION ASPECTS
 
  1.- Some parameters require a complete readjusment of the system (fs, fi, Rb) in order to work.
 
  2.- Code strutured on modules, each one with an specific goal (structured programming style).
 
  3.- Block processing: take one signal block (a set of samples from a file), process it, generate output files, then clean enviroment and get next block from file until EOF is reached.
  
   4.- Each block is processed sample by sample, simulating DSP processing style, but is pretty slow. So, each sample walks through all filters, updating memories on his way, and ends on a position inside the output vector. Then the next sample do the same, etc., until the block is empty.

   5.- Systemic coding style (as Simulink, instead of boxes, functions). This is great for didactical purposes, but makes redundant calculation on many points, and functions on the same module are highly coupled.
 
   6.- Drilling points are placed on files: the system has some observation points. Signals of those points are placed on different temporary file. On this version this files are kept on the system. On final version are deleted using an OS call.
     
   7.- Memory of all blocks of a module are collected on a matrix in order to symplifing function interfaces.

   8.- Only is extracted from files the observation window required: so, if you are seeing 200 bits of one especific drilling point, only this samples are extracted from the related file. This keep the environment with small variables -related to GUI-, avoiding large vectors or matrixes.

Required Products Communications Blockset
Signal Processing Toolbox
MATLAB release MATLAB 6.5 (R13)
Other requirements Hard Disk space for temporary files
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (14)
13 May 2012 aze

translate please i do not understand error messages

13 May 2012 aze

does not work in R2011a

12 May 2006 zhu yun

i need it

28 Apr 2006 ali ahmad  
30 Jan 2006 Jeff Begevin

It would be interesting to have an english version

26 Nov 2005 renu dhanya  
13 Jun 2005 VMC VMC  
24 Mar 2005 johann malmsteen  
31 Oct 2004 Ahmad Monemi Bidgoli  
09 Oct 2004 César Delgado González

Hi, Esther:

Sorry, I haven't got an english version.

César

08 Oct 2004 Esther Anyaegbu

Hello,
Please do you have an English version of your BPSK simulator.

Thank you.
E

16 Sep 2004 Raúl González Castelli  
10 Jul 2004 César Delgado González

Hi,

In order to use it do this:

1.- Add the path where the program is place, and all subdirectories, on Matlab path:

File ---> Set Path ---> Add With Subfolders

2.- Type: simBPSK.

Then it should work. Let me know if you have problems on execution.

07 Jul 2004 Meir Fialkov

hi
1. I don`t know how to use the files after I opened the ZIP. Do I need matlab softare???
2. Do you have Simulator for GMSK and QPSK?
thanks

Updates
20 Sep 2004

Explanation of some implementation aspects.
 
    Cause this system is better for didactical purposes, some implementation aspects should be explain in a more detailed way.

24 Sep 2004

Explanation of some implementation aspects.
 
    Cause this system is better for didactical purposes, some implementation aspects should be explain in a more detailed way.

27 Sep 2004

Explanation of some implementation aspects.
 
    Cause this system is better for didactical purposes, some implementation aspects should be explain in a more detailed way.

07 Oct 2004

Improvements: interface simplification and a better representation of Constelation.

Contact us