Low Complex Analog Beamforming Design in Multi-User mmWave Non-Orthogonal Multiple Access (NOMA)

S. Sumathi, T. K. Ramesh, Zhiguo Ding

    Research output: Contribution to journalArticlepeer-review

    2 Scopus citations


    In this paper, we investigate non-orthogonal multiple access (NOMA) scheme in millimeter wave (mmWave) communication to serve nonclustered multiple users. We explore a low complex design of an analog beamforming weight vector and the power requirement of users aiming to minimize the total power targeting to satisfy the spectral efficiency (SE) requirements of all users. We propose a low complex constant modulus analog beamforming (CMAB) algorithm, where we first reduce the number of signal to interference plus noise ratio (SINR) constraints, which is attained from the order of equivalent channel gain of users. Then, the nonconvex constraint of constant modulus (CM) is relaxed and semi-definite programming (SDP) is used to solve the problem. Obtained weight vector and power for all users are optimal since the rank of positive semi-definite (PSD) matrix is one. Later, CM constraint is included. Simulation results show that the proposed algorithm requires less power with minimum complexity compared to the existing research, digital beamforming NOMA and time division multiple access (TDMA) for the same SE requirements.

    Original languageBritish English
    Article number2350219
    JournalJournal of Circuits, Systems and Computers
    Issue number13
    StatePublished - 15 Sep 2023


    • beamforming
    • constant modulus
    • mmwave channel
    • Non-orthogonal multiple access (NOMA)
    • optimization
    • semi definite programming
    • spectral efficiency


    Dive into the research topics of 'Low Complex Analog Beamforming Design in Multi-User mmWave Non-Orthogonal Multiple Access (NOMA)'. Together they form a unique fingerprint.

    Cite this