Design and performance analysis of UWB MIMO OFDM system using microstrip antennas

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI:10.1109/ICACT.2014.6779103

Harshal Nigam, Mithilesh Kumar

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引用次数: 4

Abstract

OFDM based Ultra Wideband (UWB) system combines OFDM modulation technique with a multi banding approach, which divides the spectrum into several sub-bands, whose bandwidth is approximately 528MHz. It is a popular method for high data rate wireless communications. MIMO techniques promise a significant boost in the performance of OFDM systems. In this paper, a novel design UWB MIMO OFDM system using a compact double-sided printed antenna having ultra-wideband and band-notched characteristic is proposed. The UWB antennas are designed on CST Microwave studio simulation software with return loss less than -10dB, and further using the results from CST, OFDM transmission and reception on a MIMO system is done on MATLAB software. The MIMO UWB antennas are designed using polarization diversity of the individual antennas. The performance of this system is studied using BPSK modulation and finally bit error rate and operating range is obtained. The transmitting bandwidth is UWB (i.e. 3.1-10.6GHz) and the receiving bandwidth is notch UWB (notch bandwidth 5-5.9GHz) are chosen to reduce the interference at the receiver side. Furthermore, a MIMO UWB system is designed at a frequency of 9.4GHz that is used for micro power radar application in the ultra wideband removing the interference from WLAN band.

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微带天线UWB MIMO OFDM系统设计与性能分析

基于OFDM的超宽带(UWB)系统将OFDM调制技术与多频段方法相结合，将频谱分成若干个子频段，每个子频段的带宽约为528MHz。它是一种流行的高数据速率无线通信方法。MIMO技术有望显著提高OFDM系统的性能。本文提出了一种新型的超宽带MIMO OFDM系统设计，该系统采用具有超宽带和带陷波特性的紧凑双面印刷天线。在CST Microwave studio仿真软件上设计了回波损耗小于-10dB的UWB天线，并利用CST仿真结果，在MATLAB软件上对MIMO系统进行了OFDM发射和接收。MIMO超宽带天线是利用单个天线的极化分集来设计的。采用BPSK调制对系统的性能进行了研究，得到了系统的误码率和工作范围。发射带宽为超宽带(即3.1-10.6GHz)，接收带宽为陷波超宽带(陷波带宽5-5.9GHz)，以减少接收端的干扰。在此基础上，设计了一种频率为9.4GHz的MIMO超宽带系统，用于超宽带微功率雷达应用，消除了无线局域网频段的干扰。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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16th International Conference on Advanced Communication Technology

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