Magnitude / Phase Correction for Baseband IQ Measurements
Publication Number: 5991-2637EN
Publication Date: 2014.08.03
Language: English
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Magnitude / Phase Correction for Baseband IQ Measurements

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Testing the baseband modulation of 802.11ac MIMO signals introduces new challenges for systems engineers, such as the increased modulation bandwidth of up to 160 MHz, the support for up to eight MIMO spatial streams, and the increased requirement in EVM performance to support 256 QAM. Multichannel applications such as these require a wideband test solution capable of analyzing multiple IQ channels with highly accurate cross-channel performance.Extending 2-channel test solutions to support Multi-User MIMO (MU-MIMO) 802.11ac requirements for 160 MHz bandwidth testing can be complex, and the variation in frequency response, magnitude and phase, between channels can greatly impact measurement performance.