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Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM with Arbitrary Modulation Orders
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  • Arafat Al-Dweik ,
  • Tasneem Assaf ,
  • Mohamed El Moursi ,
  • Hatem Zein El din ,
  • Mohammad Al-Jarrah
Arafat Al-Dweik
Khalifa University

Corresponding Author:[email protected]

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Tasneem Assaf
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Mohamed El Moursi
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Hatem Zein El din
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Mohammad Al-Jarrah
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This work considers the exact bit error rate (BER) analysis of a two-user non-orthogonal multiple access (NOMA) system using quadrature amplitude modulation (QAM). Unlike existing work, no constraints on the modulation order of the QAM symbols for any user. Closed-form expressions are derived for the BER of joint multiuser detector (JMuD), which is demonstrated that it is equivalent to the successive interference cancellation (SIC) receiver. Moreover, a general expression is derived for the relation between the power allocation factors for the two users, which depends on the modulation order for each user.