This paper focuses on Multiple-Input MultipleOutput (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems, where the MIMO channel order is larger than the length of the Cyclic Prefix (CP). By swapping the filtering operations of the MIMO channel and the Fast Fourier Transform (FFT), it is shown that each tone of a MIMO OFDM system can be viewed as a MIMO Single-Carrier (SC) system. A...

Helsinki University of Technology Abstract of the Master’s Thesis Author: Jukka Koivunen Name of the Thesis: Characterisation of MIMO Propagation Channel in Multilink Scenarios Date: December 10, 2007 Number of Pages: 67 Department: Department of Electrical and Communications Engineering Professorship: S-26 Radio Engineering Supervisor: Professor Pertti Vainikainen Instructor: M.Sc. Veli-Matti ...

Orthogonal Frequency Division Multiplexing (OFDM) technique has been proposed as a standard for the next generation wireless communication system. Next generation wireless communication technologies require multimedia service such as internet services, audio, video and mainly high data rate with high mobility. OFDM fulfills these requirements. It provides high data rates and high spectral effic...

A novel scheme using spatial data stream multiplexing (SDSM) in the upcoming multiple-input multipleoutput (MIMO)-based IEEE 802.11n physical layer is proposed. It is shown that with SDSM, the same data rate can be achieved by using less number of transmit and receive antennas and therefore this scheme can reduce the number of antennas which results in reducing mutual coupling effects, hardware...

Now a day’s wireless channels effecting due to fading is the main issue in communications. MIMO techniques enable higher spectral efficiency and improve robustness against channel fading. In this paper an effort has been made to illustrate the performance comparison of the Rayleigh & Rician fading channel models for MIMO system using MATLAB simulation. The Water filling algorithm has been imple...

The conventional MIMO systems have a capability of enhancing channel capacity by exploiting multipath environment [1]. Recently, a novel scheme which utilizes MIMO system in near-field region has proposed [2]. In the near-field MIMO system, channel capacity is able to be improved without a multipath, because spherical wave is considered as a superposition of plane waves. It is expected that the...

-MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. MIMOOFDM system can compensate for the lacks of MIMO systems and give play to the advantages of OFDM system. In this paper, a general orthogonal space time block code (OSTBC) structure is proposed for multiple-input multiple-output–orthogonal frequency-division multiplexing ...

This paper reports on a new class of equalisation/detection for Wideband Multiple Input Multiple Output Communications Systems (MIMO). The proposed scheme is somewhat akin to a multi-carrier MIMO system, and more precisely, builds upon a Single Carrier Frequency Domain Equalised (SCFDE) MIMO System. At the core of our system lies a novel concept of iterative self-reused equalisation/detection (...

–One of the biggest drawbacks of OFDM is its high peak to average power ratio (PAPR). High PAPR of OFDM makes it unusable in non-linear systems. So the clipping signals scheme is one useful and simple method to reduce the PAR. This paper presents a new receive algorithm called MIMO CI-OFDM has been implemented. From the simulation results, it is shown that MIMO SFBC CI-OFDM reduces PAPR signifi...