Carrier Frequency Offset Estimation in OFDMA using Digital Filtering

Autor:	H. Solis-Estrella, Aldo G. Orozco-Lugo
Rok vydání:	2013
Předmět:	Mean squared error Control and Systems Engineering Computer science Control theory Carrier frequency offset Telecommunications link Estimator Data_CODINGANDINFORMATIONTHEORY Filter (signal processing) Electrical and Electronic Engineering Least squares Digital filter Subcarrier
Zdroj:	IEEE Wireless Communications Letters. 2:199-202
ISSN:	2162-2345 2162-2337
DOI:	10.1109/wcl.2013.011713.120872
Popis:	This letter deals with the frequency synchronization problem in the uplink of OFDMA communications systems with interleaved or generalized subcarrier allocation. An algorithm to estimate the carrier frequency offsets (CFOs) of all the active users is presented. The estimator relies upon finding the zeros of a suitable designed filter. The design of the filter boils down to the solution of a least squares (LS) problem and thus entails relatively low complexity. While under low subcarrier load conditions the estimation root mean squared error (RMSE) is higher than that of other existing methods, under heavy or full load achieves comparable and even superior performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7e9ed0168aa2c6bfeb90ad1478d21a29 https://doi.org/10.1109/wcl.2013.011713.120872 Zobrazit plný text záznamu