  This letter proposes a pragmatic link adaptation algorithm considering power
density offsets (PDOs) for next-generation uplink wireless channels. The
proposed algorithm consists of PDO calculation between a physical uplink shared
channel and its associated sounding reference signal, key channel state metric
generation, and modulation and coding scheme (MCS) adaptation with respect to
the PDO. Scaling is applied to estimated channel matrices based on multiple
reference PDO points to generate corresponding reference mutual information
(MI) values, followed by interpolation or extrapolation to obtain the adapted
MI and ultimately MCS. The proposed algorithm has low complexity in terms of
hardware implementation, while yielding satisfactory block error rates and
throughput for a wide range of PDOs as shown by simulation results.
