In this paper, we propose a new stream power allocation method for single-user beamforming for BICM MIMO-OFDM systems. To this end, we first employ a mean mutual information per bit (MMIB) for power allocation problem to accurately estimate the error rate performance. Also, a simple stream SINR for maximum likelihood detection is derived to calculate the MMIB. Then, the optimal power allocation with a diagonal matrix is derived from the approximated function of the MMIB. Also, we extend the diagonal matrix power allocation to a rotational matrix power allocation, which can provide more diversity gain thanks to combined sub-channel process. Finally, we propose an adaptive power allocation algorithm between the diagonal matrix and the rotational matrix, since the rotation matrix incurs inter-stream interference due to off-diagonal terms so that there is a performance trade-off. From the link level simulation on IEEE WLAN, we verify that our proposed stream power allocation method is effective to improve the packet error rate performance.


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    Title :

    A New Stream Power Allocation Method for SU Beamforming in BICM MIMO-OFDM Systems for IEEE WLAN


    Contributors:
    Ahn, Minki (author) / Lee, Wookbong (author) / Jeon, Eunsung (author) / Kim, Sungsoo (author) / Kim, Joonsuk (author)


    Publication date :

    2021-04-01


    Size :

    2562411 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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