5Non-Orthogonal Multiple Access (NOMA) for 5G Networks
Kirti Prakash, Mohd Javed Khan and Ram Chandra Singh Chauhan
5.1 INTRODUCTION
From first-generation (1G) to fifth-generation (5G) wireless networks, a multiple access strategy is a key technology for differentiating distinct wireless systems. In 1G, 2G, 3G, and 4G, respectively, frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), as well as orthogonal frequency division multiple access (OFDMA) were employed. These methods use orthogonal multiple access (OMA). To avoid or lessen inter-user interference, distinct users are allocated in an orthogonal manner within these multiple access structures, ...
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