Optimum single-tap per-subcarrier equalization for OFDM/OQAM systems

Autor: Mario Tanda, Davide Mattera
Přispěvatelé: Mattera, Davide, Tanda, Mario
Rok vydání: 2016
Předmět:
Signal-to-interference ratio
Orthogonal frequency-division multiplexing
MIMO
02 engineering and technology
Impulse (physics)
Filter bank multicarrier
OFDM/OQAM
Signal-to-interference ratio
Single-tap equalizer
Subcarrier
symbols.namesake
Artificial Intelligence
Control theory
Computer Science::Networking and Internet Architecture
0202 electrical engineering
electronic engineering
information engineering
Electrical and Electronic Engineering
Impulse response
Computer Science::Information Theory
Mathematics
Applied Mathematics
020206 networking & telecommunications
Adaptive equalizer
Computer Science::Other
Additive white Gaussian noise
Computational Theory and Mathematics
Signal Processing
symbols
020201 artificial intelligence & image processing
Computer Vision and Pattern Recognition
Statistics
Probability and Uncertainty
Zdroj: Digital Signal Processing. 49:148-161
ISSN: 1051-2004
DOI: 10.1016/j.dsp.2015.11.006
Popis: An equivalent multi-input multi-output (MIMO) linear model of the standard transceiver for OFDM/OQAM systems is derived. Specifically, the impulse response of the equivalent filter that determines the effect on each output of the symbol sequence transmitted on each subcarrier, both with reference to AWGN and multipath channels, is obtained. The derived model is exploited for the design of the optimum single-tap per-subcarrier equalizer according to the maximum signal-to-interference ratio criterion. It is shown that the optimum single-tap equalizer in the absence of guard subcarriers is the inverse of a specific coefficient of an impulse response of the derived MIMO model. This coefficient under particular conditions leads to the conventionally used single-tap equalizer given by the inverse of the channel frequency response at the frequency of the considered subcarrier. The effects of guard subcarriers and the inclusion of the noise term in the cost function are also studied. An equivalent model of the standard transceiver for OFDM/OQAM systems is derived.The impulse response of the equivalent filter in multipath channels is obtained.The optimum single-tap equalizer according to the maximum SIR criterion is designed.It is related to the inverse of a specific coefficient of the derived impulse response.Under particular conditions it reduces to the standard single-tap equalizer.
Databáze: OpenAIRE
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