A seven-port receiver for MIMO wireless communications

A single front-end seven-port receiver is proposed and analyzed for multiple-input and multiple-output (MIMO) systems. This new architecture uses a single front-end in order to recieve two input RF modulated signals with Alamouti coding which reduces cost and complexity in the RF section compared to classical six-port based receivers adapted for 2×2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\times 2$$\end{document} MIMO application. We also analyzed the capability of our proposed single front-end seven-port receiver for 2 ×\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\times$$\end{document} N MIMO application with Alamouti coding, and evaluated its advantages and disadvantages versus classical MIMO six-port receivers. The performance of our proposed seven-port receiver is assesed in terms of two input QPSK modulated signals; then calculating the bit error rates (BERs). The obtained results demonstrate that the proposed seven-port receiver can be a candidate for using in MIMO communication systems.