Dirty MIMO Transmitters : Does It Matter?

• The radio frequency transmitter is a key component in contemporary MIMO OFDM systems. A detailed study of a 2×2 MIMO transmitter subjected to correlated input data streams, nonlinear distortion, thermal noise, and crosstalk is provided by stochastic modeling. The effects of correlated input streams, crosstalk and nonlinearities are studied in detail, and exemplified both by approximate expressions and numerical simulations. Key results include exact and approximate expressions for the normalized mean-squared error (NMSE) for systems with or without digital predistortion, the relationship between NMSE and the signal-to-noise-and-distortion ratio, the properties of the distortion noise, and a novel design for power amplifier back-off for MIMO-transmitters subject to crosstalk. The theoretical derivations are illustrated by numerical examples and simulation results, and their relationship to state-of-the-art research are discussed. OAPA

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

Bussgang theory

Crosstalk

input back-off

MIMO communication

Nonlinear distortion

OFDM

optimization

Orthogonal frequency division multiplexing (OFDM)

power amplifier

Radio transmitters

Mean square error

Nonlinear optics

Orthogonal frequency division multiplexing

Power amplifiers

Radio frequency amplifiers

Radio transmission

Signal to noise ratio

Stochastic systems

Thermal noise

Transmitters

Approximate expressions

Input-back offs

Normalized mean squared errors

Radio frequency transmitters

Signal to noise and distortion ratio

Theoretical derivations

MIMO systems

Intelligent industri

Intelligent Industry

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