Higher-order modulation
Abstract
The digital modulation scheme determines how bits are mapped to the phase and amplitude of transmitted signals. Higher-order modulation, meaning that the modulation alphabet is extended to include additional signaling alternatives, allows more information bits to be conveyed per modulation symbol, thereby increasing the spectral efficiency and peak rate. The WCDMA/HSPA standard supports a variety of modulation schemes, both in uplink and downlink, facilitating a flexible and large dynamic range of possible transport block sizes and offering a good complement to spatial-multiplexing multiantenna techniques for increasing the peak rate. Modulation schemes have been added in different stages during ...
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