Quadrature amplitude modulation algorithm and its application of LTE system based on MIMO-OFDM platform

DOI

10.2991/amcce-15.2015.233How to use a DOI?

Keywords

broadband communication; ISI; distortion; LTE; MIMO

Abstract

In the design of LTE system, the multi input and multi output (MIMO) platform is taken as the basic configuration, high speed data transmission business is realized, due to multipath channel reorganization produced spatial focusing, intersymbol interference leads to channel imbalance, in order to improve the spectrum utilization rate, increase the system capacity, we need to increase the transmission power or bandwidth. The traditional method used orthogonal frequency division multiplexing algorithm for intersymbol interference suppression of LTE, since the carrier amplitude has negative signal distortion, it is unable to realize single week dynamic compensation. The effect is poor. A design method of LTE system is proposed based on MIMO-OFDM quadrature amplitude modulation QAM algorithm, the intersymbol interference suppression of broadband communication is taken, spectrum energy is calculated, and the input bit stream string is processed with conversion and modulation, harmonic weekly gain is produced. The communication signal is taken with OFDM decomposition, the turning negative signal sampling is obtained, the quadrature amplitude modulation of LTE system is obtained, and the algorithm is improved. Simulation results show that the algorithm is applied in the quadrature amplitude modulation and communication interference suppression of LTE system, it has god performance, it can optimize MIMO array distribution of LTE system, improve the impulse response gain of receiving array elements, and the quality of communication can be improved.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Rongfang Mei
AU  - Baichuan Cai
AU  - Jianguo Mei
PY  - 2015/04
DA  - 2015/04
TI  - Quadrature amplitude modulation algorithm and its application of LTE system based on MIMO-OFDM platform
BT  - Proceedings of the 2015 International Conference on Automation, Mechanical Control and Computational Engineering
PB  - Atlantis Press
SN  - 1951-6851
UR  - https://doi.org/10.2991/amcce-15.2015.233
DO  - 10.2991/amcce-15.2015.233
ID  - Mei2015/04
ER  -