This work presents MATLAB 7.9 model of wavelength division multiplexed (WDM) communication system for evaluating the performance of optical receiver simulation of WDM-PON (passive optical network). This paper attempts to focus on eliminating the channel internal noise due to number of users at different noise power levels, iterations, values of BER (bit error rate) and error count within time elapsed in seconds. Optical communication systems have good speed, accuracy and efficiency. But accuracy of high-speed communication is unstable due to beat noise. By using the MATLAB platform, it is easier and much simpler for understanding the signal flow in the optical receiver of WDM-PON. WDM-PON is the point-to-point connectivity and pair of wavelengths for single user. This network is suitable for present and future generation networks. Keywords: Bit error rate (BER), passive optical network (PON), beat noise, noise power, iteration, error count, channel, users, time elapsed
