LTE-Advanced: Carrier Aggregation
Driven by ever-increasing demands for higher data rates, lower latency, and higher capacity, cellular radio access technology has advanced dramatically over the past decade or so. Since packet data connectivity was introduced in cellular’s second generation, some of the more important advancements introduced include: adaptive modulation and coding (AMC), turbo coding, hybrid automatic repeat request (HARQ), multiple input/multiple output (MIMO) antenna systems, orthogonal frequency division multiple access (OFDMA), and ever-widening channel bandwidths.