Experimental investigation and comparison of modulation types for high capacity broadband transmission system to support (5G) networks

In this paper, the types of modulation that support high-capacity transmission in 5G networks and beyond are discussed. Different types of digital modulation (DP-PSK , DP-QAM) and their impact on the quality of received bits are discussed. Appropriate methods are suggested for transmitting the signal for distances up to 200 km and with an acceptable number of bit errors per unit time (BER) with acceptable values of acceptable values of signal power to the noise power, (SNR) ratio . with totally transmission bit rate approximately 6.4Tb/s . So , We describe the architecture of passive optical networks with coherent wavelength division multiplexing (PONs) Which helps to support fifth generation networks and beyond.