Paper Info
Title
Joint Time-Frequency Estimation Dmimo-Ofdm In Presence Of Ici
Abstract
Cooperative communication or distributed multi-input multi-output (DMIMO) system is a key enabler of coverage extension and enhancement of link reliability. The fundamental difficulty in deployment of DMIMO is synchronization, tracking independent oscillators and propagation delays. On the other hand, as orthogonal frequency division multiplexing (OFDM) is very sensitive to multiple timing offset (MTO) and multiple carrier frequency offset (MCFO). DMIMO-OFDM system faces a fundamental problem of synchronization. In this paper, we propose two iterative algorithms based on expectation conditional maximization (ECM) and space alternating generalized expectation maximization (SAGE) to jointly estimate MCFO and MTO in estimate-and-forward (EF) multi-relay cooperative communication system over a quasi-static channel. The performance of the estimators are evaluated by means of mean square error (MSE) and system bit error rate (BER). The results indicate that in the high SNR domain, the BER performance of the system with SAGE algorithm results in 1 dB SNR improvement as compared to that with ECM in presence of inter carrier interferences ( ICI).
Year
Venue
Keywords
2016
2016 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE
Cooperative communication, ECM, SAGE, EF protocol, DMIMO-OFDM, ICI
Field
DocType
ISSN
Synchronization,Computer science,Carrier frequency offset,Communications system,Mean squared error,Real-time computing,Orthogonal frequency-division multiplexing,Maximization,Estimator,Bit error rate
Conference
1525-3511
Citations 
PageRank 
References 
0
0.34
12
Authors
2
Name
Order
Citations
PageRank
Sucharita Chakraborty154.14
Debarati Sen211619.01