A Coherent Hybrid Precoding for homogenize Millimeter-wave Multiple- in Multiple- out Systems for 5G Communication

摘要

In the present scenario, most of the communication systems depend upon MU-Millimeter Waves. A high gain beamforming has been achieved by using millimeter wave communication system. A group of antennas used at transmitter and receiver-end for providing better throughput and efficiency is called massive multiple input multiple-output (MIMO). By using this technique, a better spectral efficiency, throughput, power efficiency and also low bit error rates can be achieved when it is used along with the fifth generation mobile networks. Multiple number of antennas are used at the transmitter and receiver end instead of single antenna. The interference and multipath propagation problems are the major disadvantages in communication systems, which can be resolved in this technique. Through multiple antennas transmission of data is done as it is taking multiple different paths because of obstacles in the environment to make the system more efficient at the receiver antenna the best received signal is processed. To overcome signaling overhead complexity efficient signal processing techniques have to be used at both the ends. To resolve path loss MIMO is furnished with millimeter wave bands. To achieve high spectral efficiencies which requires less cost and to consume low power precoding of hybrid analog/digital is used. At transmitter end and receiver end large antenna arrays are deployed to provide required signal power which makes the architecture for millimeter-wave systems more complex. Hybrid precoding is an attractive architecture for millimeter-wave systems. It focuses on narrowband channels. A union of digital and analog precoding which is a hybrid precoding is preferred to achieve less complexity and better performance. To take the advantage of beam forming gain and spatial multiplexing in millimeter wave system hybrid precoding is exploited for more frequency chain. An inter user interference is nullified at analog step. The transmitting data rate is maximized at digital step. The proposed work, Hybrid Precoding is preferred is to estimate digital precoding for eliminating inter-user interference basing on solving convex optimization problem. By using more base station antennas more directive gain can be distributed to large number of users. Bit error rate and spectral efficiency is improved for 100 paths.