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Application Notes
Meeting the demands of today’s evolving wireless industry is a hefty challenge, especially since according to some estimates, mobile data traffic will grow by leaps and bounds in the coming years. In response to this explosion of data consumption, 4G cellular standards like LTE-Advanced (LTE-A) leverage advanced techniques such as Multi-Input Multiple-Output (MIMO) and Carrier Aggregation (CA) to enable operators to squeeze more capacity, better coverage and higher data rates from their existing frequency spectrum. With the higher data throughput, operators can offer customers a better overall experience with integrated services such as voice, video, chat, and file sharing. And that’s why achieving higher data throughput is so critical these days.
LTE-A is a prime example of a standard that has evolved in singular pursuit of that goal. With each new 3GPP standard release it has added support for more bands, more band combinations and more CA Component Carriers (CCs). Designers have responded to the promise of LTE-A helping to solve the mobile data explosion by designing it into their User Equipment (UE). However, that creates a few challenges of its own. Not only do the UE devices become all the more complex just by utilizing LTE-A, they also have to perform in highly dynamic environments. While LTE-A networks are designed to adapt to real-world operating conditions with dynamic link allocation and complex handover scenarios, this variability results in thousands of potential scenarios under which the UE is expected to perform well. That makes real-world functional and RF test (validation) of LTE-A performance a challenging proposition at best.
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