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Performing wideband digital pre-distortion

Posted: 05 Oct 2011 ?? ?Print Version ?Bookmark and Share

Keywords:LTE-Advanced? IEEE 802.11ac? power amplifiers?

A transition is poised to take place in the wireless communications industry as wireless service providers embrace broadband communication standards such as LTE-Advanced and IEEE 802.11ac. In order to achieve Gb/s link-level throughput, these new formats use wider bandwidths, multiple-input multiple-output (MIMO) space-time coding, and higher order orthogonal frequency division multiplexing (OFDM) modulation formats. These requirements place new demands on linearity, bandwidth and power consumption in wireless components. For example, LTEAdvanced supports up to 100MHz bandwidth to reach 1Gb/s and 500 Mb/s data rates for the downlink and uplink, respectively. IEEE 802.11ac will support 80MHz and 160MHz bandwidths to achieve throughputs of at least 1 Gb/s for multistation and 500 Mb/s maximum for a single link.

This application note outlines a broadband modeling approach that
? Quickly characterizes broadband RF power amplifiers,
? Assesses "how linearizable" transceiver designs are, requiring typical wireless engineering skill sets and equipment; and
? Helps estimate real-world 4G performance, prior to committing to intellectual property (IP), hardware or implementation details.

View the PDF document for more information.

Originally published by Agilent Technologies Inc. at www.agilent.com as "Wideband Digital Pre-Distortion with Agilent SystemVue and PXI Modular Instruments".





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