Cooperative scheduling for pilot reuse in massive MIMO systems

YK Hua, W Chang, SL Su - IEEE Transactions on Vehicular …, 2020 - ieeexplore.ieee.org
To be differentiated from the literature, in this paper, we aim to alleviate the impact of pilot
contamination (PC) on the massive MIMO systems by cooperatively scheduling users (rather …

Pilot design and allocation for multi-cell massive MIMO systems with two-tier receiving

A Hu - IEEE Transactions on Vehicular Technology, 2020 - ieeexplore.ieee.org
This paper investigates pilot design and allocation in multi-cell massive multiple-input
multiple-output systems with two-tier receiving. As the length of pilot is limited, the pilots …

System and method for reducing pilot signal contamination using orthogonal pilot signals

S Ashrafi - US Patent 10,554,264, 2020 - Google Patents
(57) ABSTRACT A communications system includes a plurality of transmit ting units that
each generate a pilot signal modulated using quantum level overlay modulation to apply at …

Mitigating inter-cell pilot interference via network-based greedy sequence selection and exchange

S Bazzi, W Xu - US Patent 10,666,464, 2020 - Google Patents
Allocation of CSI-RS or CSI pilot sequences among cells in a cooperative manner to reduce
pilot inter-cell interference. Sequences in each cell occupy the same time slot, multiple …