IEEE 802.11 Testing with EB Propsim F8 and Geometric Channel Modeling Tool

 

Recent development in the IEEE 802.11 standard has introduced the ac amendment as evolution of the 802.11n for very high data rate to end user devices. The IEEE 802.11ac testing is a tremendous challenge due to wide signal bandwidth and modern MIMO technologies such as beamforming and multi-user MIMO (MU-MIMO). To meet these challenges, EB has developed support for 80 MHz and 80 + 80 MHz bandwidth in EB Propsim F8 with enhanced modeling capability for beamforming and MU-MIMO testing.

Main Benefits:

  • Optimize air interface performance of IEEE 802.11ac products and maximize the achievable system throughput with a one box multi-channel fading emulator
  • Achieve better product quality and performance in faster schedule and lower overall costs
  • These benefits are made possible by:
    • Controllable multi-channel fading environment
    • Repeatable lab testing facility
    • 80 MHz bandwidth with excellent EVM (Error Vector Magnitude) performance (< -43 dB)
    • Beamforming and multi-user MIMO testing capability

Solution Overview


EB Propsim F8 with advanced EB Geometric Channel Modeling (GCM) application allows easy configuration of testing MIMO and MU-MIMO features in any kind of realistic and non-ideal propagation scenarios. EB Propsim F8 enables to design and verify the IEEE 802.11n and 802.11ac product spatial multiplexing, beamforming and MU-MIMO algorithms as well as the critical Channel State Information (CSI) functionality both in faster schedule and with better coverage reducing overall development costs. EB Propsim F8 provides correlation accuracy and repeatability crucial for any performance test facility of MIMO systems. Full control for radio channel characteristics and undistorted 80 MHz bandwidth with excellent EVM performance enable performance testing that allows to optimize the air interface performance and to maximize the achievable system throughput before launching products to the market.

EB Propsim F8 for IEEE 802.11n / 802.11ac testing:

  • 80 MHz bandwidth
    • Available also 40 MHz, 125 MHz and 80 + 80 MHz bandwidth variants
  • 220 MHz – 6000 MHz frequency range
    • Five frequency band options to select
  • Bi-directional testing of 3x3 or 4x4 MIMO with single unit
    • Up to 8x8 unidirectional MIMO emulation supported with single unit
  • Bi-directional MU-MIMO testing, e.g. four stations (single antenna) and one access point (4 antennas) with single unit
  • IEEE TGn 802.11n modeling tool with A, B, C, D, E and F user scenarios

Beamforming modeling with EB Geometric Channel Modeling (GCM) application:

  • MU-MIMO test scenario modeling with up to 4 users
  • User defined parameters such as antenna array geometries and patterns
    • Locations and movement of wanted and interfering users
    • Multipath propagation (generic model based stochastic or user defined scattering clusters)
    • Includes spatial movement (angular evolution)
  • Combines stochastic fading and multipath phenomena with exact pre-defined directional parameters and measured antenna characteristics
  • Support the usage of arbitrary user defined antenna beam patterns and antenna array geometries
  • Support for 3D modeling (antenna tilting, 3D antenna patterns, etc.)

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