BER MEASUREMENT IN THE
Communication Engineering Lab Report
JITENDRA KUMAR MEENA
In digital transmission, the number of bit errors is the number of received bits of a data
stream over a communication channel that have been altered due to noise, interference,
distortion or bit synchronization errors.
The bit error rate or bit error ratio (BER) is the number of bit errors divided by the total
number of transferred bits during a studied time interval. BER is a unitless performance
measure, often expressed as a percentage.
The bit error probability pe is the expectation value of the BER. The BER can be considered
as an approximate estimate of the bit error probability. This estimate is accurate for a long
time interval and a high number of bit errors.
To set up a digital communications systems over a noisy, band limited channel, with
provision for line coding, and do BER measurements.
Bit Error Porbability (Pb) is a function of E0/N0
for i = 1:length(SNR)
title 'SNR vs Bit Error Rate'
Bit transmitted =49992
Noise,N E No. Error
1.4 1.4 13419 0 0.27
1.2 1.4 10701 1.34 0.21
0.99 1.4 7399 3.00 0.15
0.81 1.4 4175 4.75 0.084
0.7 1.4 2425 6.02 0.049
0.6 1.4 1105 7.36 0.022
0.55 1.4 664 8.12 0.0133
0.5 1.4 277 8.94 0.0045
0.44 1.4 120 10.05 0.0024
0.39 1.4 37 11.01 0.00074
0.34 1.4 4 12.3 0.00008
The Plot is similar to theoretical plot for SNR greater and equal to zero. We concluded
that Bit Error Rate reduces on decreasing the noise .