jist.swans.radio
Class BERTable

java.lang.Object
  jist.swans.radio.BERTable

public class BERTable
extends java.lang.Object

Implementation of Bit-Error-Rate calculations (via a loaded table) for a range of Signal-to-Noise-Ratio values.

Since:

SWANS1.0

Constructor Summary

BERTable(java.lang.String filename)
Initialize the BER table with data from given file.

Method Summary

double	calc(double snrVal) Compute BER value by interpolating among existing SNR points.
boolean	shouldDrop(double snrVal, int bits) Compute probabilistically whether an error occured for a given number of bits and SNR value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BERTable

public BERTable(java.lang.String filename)
         throws java.io.IOException

Initialize the BER table with data from given file.

Parameters:

filename - file to load

Throws:

java.io.IOException - unable to read BER file

Method Detail

calc

public double calc(double snrVal)

Compute BER value by interpolating among existing SNR points.

Parameters:

snrVal - input SNR value for BER computation (interpolation)

Returns:

Bit-Error-Rate

shouldDrop

public boolean shouldDrop(double snrVal,
                          int bits)

Compute probabilistically whether an error occured for a given number of bits and SNR value.

Parameters:

snrVal - Signal-to-Noise-Ratio value

bits - number of bits

Returns:

whether (probabilistically) an error occurred