NDLI: Maximum likelihood algorithms for joint estimation of synchronisation impairments and channel in multiple input multiple output–orthogonal frequency division multiplexing system

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Maximum likelihood algorithms for joint estimation of synchronisation impairments and channel in multiple input multiple output–orthogonal frequency division multiplexing system

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Maximum likelihood algorithms for joint estimation of synchronisation impairments and channel in multiple input multiple output–orthogonal frequency division multiplexing system

Content Provider	IET Digital Library
Author	Jose, Renu Hari, K. V. S.
Abstract	Maximum likelihood (ML) algorithms, for the joint estimation of synchronisation impairments and channel in multiple input multiple output–orthogonal frequency division multiplexing (MIMO–OFDM) system, are investigated in this work. A system model that takes into account the effects of carrier frequency offset, sampling frequency offset, symbol timing error and channel impulse response is formulated. Cramér–Rao lower bounds for the estimation of continuous parameters are derived, which show the coupling effect among different impairments and the significance of the joint estimation. The authors propose an ML algorithm for the estimation of synchronisation impairments and channel together, using the grid search method. To reduce the complexity of the joint grid search in the ML algorithm, a modified ML (MML) algorithm with multiple one-dimensional searches is also proposed. Further, a stage-wise ML (SML) algorithm using existing algorithms, which estimate less number of parameters, is also proposed. Performance of the estimation algorithms is studied through numerical simulations and it is found that the proposed ML and MML algorithms exhibit better performance than SML algorithm.
Starting Page	1567
Ending Page	1579
Page Count	13
ISSN	17518628
Volume Number	7
e-ISSN	17518636
Issue Number	Issue 15, Oct (2013)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/7/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2012.0667
Journal	IET Communications
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Carrier Frequency Offset Effects Channel Estimation Channel Impulse Response Combinatorial Mathematics Communication Channel Equalisation And Identification CrameÌ�r-Rao Lower Bounds Joint Grid Search Complexity Reduction Maximum Likelihood Estimation MIMO Communication MIMO-OFDM System ML Algorithm MML Algorithm Modified Maximum Likelihood Algorithm Modulation And Coding Method Multiple Input Multiple Output-orthogonal Frequency Division Multiplexing System Multiple One-dimensional Searches Numerical Analysis Numerical Method Numerical Simulation OFDM Modulation Optimisation Technique Radio Link And Equipment Sampling Frequency Offset Effect Search Problem SML Algorithm Stage-wise ML Algorithm Statistics Symbol Timing Error Synchronisation Channel Estimation Synchronisation Impairment Estimation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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