Chapter 3

New Radio Access Physical Layer Aspects (Part 1)

Abstract

The physical layer is the lowest protocol layer in baseband signal processing that interfaces with the digital and the analog radio frontends and the physical media. The physical layer further interfaces with the MAC sublayer and processes the transport blocks through channel coding, rate matching, interleaving/scrambling, baseband modulation, layer mapping for multi-antenna transmission, digital precoding, resource element mapping, OFDM modulation, and antenna mapping. The choice of appropriate modulation and coding scheme as well as multi-antenna transmission mode is critical to achieve the desired reliability/robustness (coverage) and system/user throughput in mobile communications. ...

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