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Application Notes
As companies rush to get Long Term Evolution (LTE) products to market, engineers face tough challenges in testing these often complex devices. The mandate to include Multiple-Input Multiple-Output (MIMO) means many engineers are working to optimize their multiantenna architectures. To achieve time-to-market goals, the MIMO solutions under development need to work correctly in real-world situations. Defining situations when MIMO transmissions will improve system performance can be complicated, but it is a critical aspect of successful implementation.
Of particular interest is how to quickly determine whether a MIMO channel is capable of supporting spatial multiplexing under a given signal-to-noise ratio (SNR). Fortunately with the proper test equipment, a figure of merit called “condition number” can provide a short-term indication of the SNR required to properly recover a MIMO transmission over the selected wireless channel.
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