R&S®SMW-K74 MIMO Fading/Routing

Key Facts

  • Higher order MIMO fading simulation
  • Increased number of baseband signal sources
  • Adjustable MIMO correlation between fading channels

Brief Description

The R&S®SMW-K74 option adds MIMO fading and signal routing capabilities to the R&S®SMW200A. The option enables simulation of up to eight baseband sources and up to 16 fading channels.

Specifications

MIMO simulation
Max. number of baseband sources 8
Max. number of fading channels 16
Number of fading paths per channel 20

Key Facts

  • Higher-order MIMO fading simulation up to 8x2 MIMO
  • Increased number of baseband signal sources
    • Baseband TX signal generation for higher-order MIMO
    • Generation of multi-cell/multi-carrier signal scenarios
  • 2x2 MIMO channel simulation for up to two separate entities (users/cells/carriers)
  • Adjustable MIMO correlation between fading channels
  • Steering matrix support
  • Pre-defined MIMO fading profiles for LTE, WLAN 802.11, WiMAX

Brief Description

The R&S®SMW-K74 option adds MIMO fading and signal routing capabilities to an R&S®SMW200A that is equipped with an R&S®SMW-B13T baseband main module, two R&S®SMW-B10 baseband hardware modules and two or four R&S®SMW-B14 fading simulator hardware modules.

The R&S®SMW-K74 option enhances the capability of the R&S®SMW200A, enabling the instrument to generate a maximum of eight baseband signals at the same time. The internal baseband signal sources are either configured separately, e.g. for simulation of enhanced interferer scenarios, or are configured as coupled sources, e.g. for easy generation of all TX antennas of a complex MIMO system.

Additionally, the R&S®SMW-K74 option enables MIMO channel simulation for the internal fading simulator of the R&S®SMW200A. Depending on the number of installed fading simulator modules, up to four (with 2x R&S®SMW-B14) or up to 16 (with 4x R&S®SMW-B14) individual fading channels are emulated. With two R&S®SMW-B14 options, MIMO scenarios such as 1x2, 2x1 or 2x2 can be simulated. With four installed R&S®SMW-B14 fading modules, additionally the MIMO scenarios 4x2, 2x4, 3x3, 4x4, 8x2 (and subsets) can be simulated.

Furthermore, MIMO fading can be performed for two separate entities (users/cells/carriers), which supports scenarios such as 2x2x2 MIMO. This allows realistic simulation of 2x2 MIMO fading for multi-carrier signals (e.g. two aggregated LTE-A carriers) or multiple cells (e.g. dual-cell HSPA+) within one R&S®SMW200A.

MIMO channel emulation includes full simulation of all correlations between the different fading channels. The channel correlations can either be set via TX/RX antenna correlations (Kronecker mode), by defining a specific MIMO correlation matrix or by using a geometrical description (SCM fading model). Additionally, standardized MIMO fading profiles – as they are defined e.g. for LTE or WLAN 802.11n – are available as presets.

Specifications

MIMO baseband signal generation
Max. number of baseband sources depending on MIMO configuration 8
MIMO fading simulation
Max. number of fading channels 16
Number of fading paths per fading channel 20
Supported MIMO modes with 2x R&S®SMW-B14 1x2, 2x1, 2x2
with 4x R&S®SMW-B14 1x2, 2x1, 2x2, 2x3, 3x2, 2x4, 4x2, 3x3,
3x4, 4x3, 4x4, 8x1, 8x2
Number of fading entities
(users/cells/carriers)
depending on MIMO configuration 1 or 2
Fading bandwidth depending on MIMO configuration 80 MHz or 160 MHz
Correlation Correlation between corresponding fading paths of all TX/RX signal paths can be set in a correlation matrix. For each fading path index, an individual matrix can be set.
Correlation matrix setting individually or with Kronecker assumption (RX and TX antenna correlation with automatic calculation of matrix)
Matrix representation (real, imaginary) or (magnitude, phase)
Steering matrix can be set by setting the diagonal elements of the correlation matrix
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