MIMO Wireless Communications: Advanced Simulation Framework and RealTime System Implementation

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MIMO Wireless CommunicationsAdvanced Simulation
Frameworkand Real-Time System Implementation

• Michael A. Jensen
• Department of Electrical and Computer Engineering
• Brigham Young University
• Provo, UT USA
• [phone]/jensen_at_ee.byu.edu

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MIMO Wireless Communications
MIMO Multiple-Input Multiple-Output Exploit
multiple communication modes
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MIMO Channel Probing System
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Polarization Capacity CCDF
20 dB SISO SNR Co-Pol
Dual Polarization
Single Polarization
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Capacity/Channel CCDF
All arrays 2.25l long
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Physical-Statistical ModelSaleh-Valenzuela with
AOA/AOD (SVA)
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Channel Model vs. Data
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Other MIMO Related Activities

• Precoding for multi-user MIMO (SDMA)
• Models for channel temporal variation
• Differential space-time codes
• Application of space-time codes to
  non-traditional channels
• Intrinsic capacity bounds
• Effect of mutual coupling on MIMO performance
• Multi-user channel probing/modeling

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Research Task 1Multi-Antenna Modeling Suite

• Channel Models
• Statistical
• Path-based
• Ray-tracing

• RF Front End
• Amplifiers/Mixers
• Nonlinearity
• Noise

Multi-Antenna System Performance Modeling Software
Suite

• Time/Freq Signaling
• OFDM
• QAM Constellation

• Spatial Signaling
• ST codes
• Spatial multiplexing
• Diversity
• Beamforming

• Receiver
• Channel estimation
• Carrier/timing recovery
• Demodulation
• Detection

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Past ExperienceSoftware Modeling Suites

• 4 Product Suites
• Extensive Automation
• Design, Simulate, Optimize, Display

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Software DevelopmentBenefits and Tasks

• Benefits
• Facilitate student education
• Valuable research tool
• Powerful assessment tool for industry

• Tasks
• Technical module development and testing
• Use model/user interface development
• Output visualization development
• Integration and QA

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Research Task 2Real-Time MIMO Platform
Augmentation

• 2.4 GHz carrier/25 MHz bandwidth
• Digital radio IF processing
• DSP baseband processing
• GPS locked carrier/timing synchronization

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Real-Time PlatformLimitations and Tasks

• Currently, platform does not perform
• Carrier recovery
• Symbol timing recovery
• Critical Functions for Assessing Ultimate MIMO
  System Performance

• Tasks
• Research/develop multichannel carrier and symbol
  timing recovery techniques
• Implement recovery techniques in DSP
• Platform Capable of Emulating Operational MIMO
  System Performance