Link Adaptation in MIMO-OFDM with Practical Impairments
Alberto Rico-Alvarino and and Robert W. Heath, Jr.
In Proc. of Asilomar Conference on Signals, Systems, and Computers, pp. 1649 - 1653, Nov., 2013.
Abstract—Performing link adaptation in multiple-input multiple-
output orthogonal frequency division multiplexing
(MIMO-OFDM) systems is challenging due to the problem
of mapping the channel state information to a frame error
rate (FER) value. This difficulty comes from the spatial and
frequency selectivity of the channel, which makes the different
symbols in a codeword to observe different signal to noise ratio
values. Moreover, practical impairments like non-Gaussian noise,
different frame lengths, or channel nonlinearities can severely
affect the adaptation procedure in real scenarios. In this paper
we study different FER prediction techniques, which can be
classified in parametric, non-parametric and semi-parametric. We
evaluate the performance of the FER predictors under practical
impairments, and compare the achieved throughput when used
in conjunction with link adaptation algorithms.