Pratschner, S., Zöchmann, E., & Rupp, M. (2015). Low Complexity Estimation of Frequency Selective Channels for the LTE-A Uplink. IEEE Wireless Communications Letters, 4(6), 673–676. https://doi.org/10.1109/lwc.2015.2481428
Electrical and Electronic Engineering; Control and Systems Engineering
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Abstract:
3GPP LTE-A uplink channel estimation is based on
pilot symbols. For the support of MIMO transmissions, a special
reference symbol structure was standardized to perform MIMO
channel estimation without excessive overhead. We propose a low
complexity channel estimation method in the frequency domain
based on correlation that exploits the orthogonal structure of the
reference symbols to mitigate inter-layer interference. Further, we introduce a smoothing method to deal with the interference
that leads to improved performance at low signal to noise ratio.
