Communication Engineering

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Browsing Communication Engineering by Author "Aga, Bayou"

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    Performance Analysis of Precoding Techniques for 5G Massive MIMO and Wireless Systems
    (Addis Ababa University, 2018-10) Aga, Bayou; Dereje, Hailemariam (PhD); Amare, Kassaw (Mr.) Co-Advisor
    Due to that wireless technology improvement is ongoing, the numbers of users and applications increase rapidly. Then wireless communications need the high data rate and link reliability at the same time. Future generation wireless communication will have to deal with some core requirements for serving a large number user simultaneously, upholding high throughput for each user, assuring less energy consumption, etc. In practice, the interuser interference has impact when more users access to the wireless link. Complicated transmission techniques such as interference cancellation should be used to maintain a given desired quality of service. Due to these problems, Massive MIMO with very large antenna arrays are proposed. Massive MIMO is one of these promising technologies which have introduced the concept of using hundreds or thousands of antennas at the base station and serving tens or hundreds of user simultaneously. A massive number of antennas will help to concentrate the radiated energy into smaller region hence will improve the throughput and energy efficiency of the system. In this paper, we have investigated the performance of a massive MIMO system utilizing different precoding techniques (e.g. MMSE, ZF, MRT) under Rayleigh fading channel with both complete and incomplete channel state information at the transmitter (CSIT).