Reducing peak-to-average power ratio in MIMO communication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMilad Fozooni, Ulf Gustavsson, Roland Carlsson, Aare Mällo
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Abstract
A method for reducing peak-to-average power ratio, PAPR, in a Multiple Input Multiple Output, MIMO, communication system is disclosed. The method is performed in a precoder unit and includes: confining, by a differentiable cost function, power of a MIMO signal to be between a lower threshold, Plow, and an upper threshold, Pup, and applying a gradient method on the differentiable cost function until reaching a set power target for the MIMO signal, while keeping an Error Vector Magnitude, EVM, below a set EVM level.
Claims20
A method for reducing peak-to-average power ratio, PAPR, in a Multiple Input Multiple Output, MIMO, communication system, the method being performed in a precoder unit and comprising:
- confining power of a MIMO signal by a differentiable cost function, and
- applying iteratively a gradient method on the differentiable cost function until reaching a set power target for the MIMO signal, while keeping an Error Vector Magnitude, EVM, below a set EVM level.
A precoder unit for reducing peak-to-average power ratio, PAPR, in a Multiple Input Multiple Output, MIMO, communication system, the precoder unit being configured to:
- confine power of a MIMO signal by a differentiable cost function, and
- apply iteratively a gradient method on the differentiable cost function until reaching a set power target for the MIMO signal, while keeping an Error Vector Magnitude, EVM, below a set EVM level.
An access network node, the access network node comprising a precoder unit being configured to:
- confine power of a MIMO signal by a differentiable cost function, and
- apply iteratively a gradient method on the differentiable cost function until reaching a set power target for the MIMO signal, while keeping an Error Vector Magnitude, EVM, below a set EVM level.
Dependencies are inferred from the claim text.