A stochastic multiple-input-multiple-output radio channel model for evaluation of space-time coding algorithms

2002 ◽  
Author(s):  
K.I. Pedersen ◽  
J.B. Andersen ◽  
J.P. Kermoal ◽  
P. Mogensen
Keyword(s):  
Channel Model ◽  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Space Time ◽  
Space Time Coding ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Time Coding

Joint Beamforming and Space-Time Coding for MIMO Channels

2009 ◽  
pp. 264-285
Author(s):  
Biljana Badic ◽  
Jinho Choi
Keyword(s):  
Smart Antenna ◽  
Multiple Input Multiple Output ◽  
Space Time ◽  
Diversity Gain ◽  
Mimo Channels ◽  
Space Time Coding ◽  
Joint Design ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Time Coding

This chapter introduces joint beamforming (or precoding) and space-time coding for multiple input multiple output (MIMO) channels. First, we explain key ideas of beamforming and space- time coding and then we discuss the joint design of beamformer and space-time codes and its benefits. Beamforming techniques play a key role in smart antenna systems as they can provide various features, including spatially selective transmissions to increase the capacity and coverage increase. STC techniques can offer both coding gain and diversity gain over MIMO channels. Thus, joint beamforming and STC is a more practical approach to exploit both spatial correlation and diversity gain of MIMO channels. We believe that joint design will be actively employed in future standards for wireless communications.

scholarly journals Space-Time Coding: an Overview

2017 ◽  
Vol 2 (3) ◽  
pp. 212 ◽  
Author(s):  
Giuseppe Caire ◽  
Petros Elia ◽  
K. Raj Kumar
Keyword(s):  
Fading Channels ◽  
Multiple Input Multiple Output ◽  
Space Time ◽  
Code Design ◽  
Error Performance ◽  
Open Problems ◽  
Information Theoretic ◽  
Space Time Coding ◽  
Input Multiple Output ◽  
Time Coding

This work provides an overview of the fundamental aspects and of some recent advances in space-time coding (STC). Basic information theoretic results on Multiple-Input Multiple-Output (MIMO) fading channels, pertaining to capacity, diversity, and to the optimal Diversity Multiplexing Tradeoff (DMT), are reviewed. The code design for the quasi-static, outage limited, fading channel is recognized as the most challenging and innovative with respect to traditional “Gaussian” coding. Then, a survey of STC constructions is presented. This culminates with the description of families of codes that are optimal with respect to the DMT criterion and have error performance that is very close to the information theoretic limits. The paper concludes with some important recent topics, including open problems in STC design.

scholarly journals Channel Modelling for Multiprobe Over-the-Air MIMO Testing

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Pekka Kyösti ◽  
Tommi Jämsä ◽  
Jukka-Pekka Nuutinen
Keyword(s):  
Channel Model ◽  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Anechoic Chamber ◽  
Geometric Description ◽  
Channel Modelling ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Specific Mapping ◽  
Wave Synthesis

This paper discusses over-the-air (OTA) test setup for multiple-input-multiple-output (MIMO) capable terminals with emphasis on channel modelling. The setup is composed of a fading emulator, an anechoic chamber, and multiple probes. Creation of a propagation environment inside an anechoic chamber requires unconventional radio channel modelling, namely, a specific mapping of the original models onto the probe antennas. We introduce two novel methods to generate fading emulator channel coefficients; the prefaded signals synthesis and the plane wave synthesis. To verify both methods we present a set of simulation results. We also show that the geometric description is a prerequisite for the original channel model.

scholarly journals MIMO Fading Emulator Development with FPGA and Its Application to Performance Evaluation of Mobile Radio Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Yoshio Karasawa ◽  
Katsuhiro Nakada ◽  
Guijiang Sun ◽  
Rikako Kotani
Keyword(s):  
Channel Model ◽  
Multiple Input Multiple Output ◽  
New Developments ◽  
Performance Limit ◽  
Stage Scheme ◽  
Mobile Radio Systems ◽  
Multiple Input ◽  
Field Programmable ◽  
Input Multiple Output ◽  
Radio Systems

We present four new developments for a multiple-input multiple-output (MIMO) over-the-air measurement system based on our previous studies. The first two developments relate to the channel model for multipath environment generation. One is a further simplification of the circuit configuration without performance degradation by reducing the number of delay generation units, which dominate the performance limit when implementing the circuit on a field-programmable gate array (FPGA). The other is to realize spatial correlation characteristics among the input ports on the transmission side, whereas the previously proposed channel model did not consider this correlation. The third development involves the details of implementing the MIMO fading emulator on an FPGA as a two-stage scheme. The fourth is the demonstration of application examples of the developed system.

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