Performance assessment and computer simulation of the M-ary FSK modulation scheme

In digital communication technique the most important issue is to receive data at receiver side similar to the data send from the transmitter side with a high speed using fewer channel bandwidth. This means that it is very important to test the systems in terms of probability of error P(e) to observe the system's performance. Each modulation technique has different performance while dealing with signals, which normally are affected by noise. A performance analysis of M-ary frequency shift keying (M-ary FSK) has been carried out in this paper. To better understand the M-ary FSK system it is simulated for different number of levels or symbols (M=2n for n=1, 2, 3,…etc) using Matlab with Simulink scientific software. When increasing the number of levels (M), the basic result, that is the decrease of bit error rate (BER), but in general M-ary modulation systems are more bandwidth efficient than other binary modulation systems.