Low-Complexity Truncated Polynomial Expansion DL Precoders and UL Receivers for Massive MIMO in Correlated Channels

• Published in: IEEE transactions on wireless communications Vol. 18; no. 2; pp. 1069 - 1084
• Main Authors: Benzin, Andreas, Caire, Giuseppe, Shadmi, Yonatan, Tulino, Antonia M.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Beamforming; Coherence; complexity reduction; Computation; Covariance matrices; Covariance matrix; Downlinking; Eigenvectors; Large-scale MIMO; linear precoding; Mathematical analysis; Matrix algebra; Matrix methods; MIMO communication; OFDM; polynomial expansion; Polynomials; Power management; Precoding; random matrix theory; Reciprocity; Resource management; Transmission line matrix methods; uplink-downlink duality; Uplinking

In Time Division Duplex reciprocity-based massive MIMO, it is essential to compute the downlink precoding matrix over all OFDM resource blocks within a small fraction of the uplink-downlink slot duration. Because of this harsh computation latency constraint, early implementations of massive MIMO con...