Pseudo-random code generator design for satellite transponder of 5G wireless networks

In satellite communication systems, a data stream for a direct sequence spread spectrum transmitter is multiplied by a pseudo-random code. It can then be transmitted over the same microwave channel as multiple users. Correlating the received composite signal with the provided pseudo-random code at the receiver end will extract the original data stream without interference. The proposed transponder models here are to achieve the objective of minimizing the satellite onboard components, increasing the speed of operations for higher bandwidth, and transmitting more information to a large group of users. However, taking advantage of this technology and overcoming the challenges of implementing it in a real-time environment, a satellite transponder was designed at a speed of 128 bps. The satellite transponder here is to accommodate satellites interconnecting 5G wireless networking systems. This paper describes the useful roles of pseudo-random code generations and the methods of applications to track the desired binary data bit sequences according to the preferred carrier frequency channels. The designed transponder schematic circuit was tested for the received uplink signal at the carrier frequency 13 GHz and transmit downlink signal at 11 GHz. To evaluate the designed onboard transmitter system performance, initially, the system was analyzed in terms of energy per bit-to-noise power spectral density ratio, bit error rate, and finally signal-to-noise power ratio. The design system was measured for the operations with minimum bandwidth of 100 MHz upto 1.28 GHz for the input bit rates of 200 Mbps upto 2.56 Gbps respectively.