… CSIT acquisition approach for FDD massive MIMO system. … of channel statistics, a prior CSIT
estimation scheme with 1-bit … overhead for the FDD massive MIMO system. Specifically, the …

… Conventional approaches to obtain CSIT for FDD MIMO systems require downlink training
… will cause a large overhead for 3D Massive MIMO/FD-MIMO systems because of the large …

… acquisition using uplink pilots, acquiring CSIT for frequency division duplexing (FDD)
systems … contributes to enhancing the CSIT estimation quality in massive MIMO systems. …

… Moreover, CSI at the transmitter (CSIT) in massive MIMO systems is also necessary for
signal processing at the BS, which indicates that the acquired CSI at the user should be …

… Realizing the similarity between the UL pilot contamination and the DL CSI acquisitions in
massive MIMO, we adopt the same FFT-based pilot sequence for the m-th transmit antenna at …

… schemes usually induce a large CSI signaling overhead due to the acquisition of real-time …
on the effective CSIT estimation error. This issue is more challenging in a FDD massive MIMO …

… In time-divisionduplexing (TDD) systems, CSIT can be acquired during uplink … Therefore,
maintaining a useful level of CSIT becomes a new challenge in the FDD massive MIMO systems…

… feedback scheme for FDD based massive MIMO systems. This … sensing based adaptive CSI
acquisition scheme is introduced … CSIT estimation and feedback for FDD multi-user massive …

… of massive MIMO system, however, can be acquired only … because they do not require
CSIT. SM and SSK use the spatial … high data rate in massive MIMO system without CSIT [14]. …

… CSIT is acquired via channel feedback in frequency-division duplexing (FDD) system, which
suffers from large … codebook is proposed for FDD massive MIMO system to alleviate the …