Preamble and Pilot Design with Computationally Efficient Synchronization and Cell Search Algorithms in Cellular OFDM Systems

Authors:
Hyun Jong Yang;Won-Yong Shin
Affiliations:
Department of Electrical Engineering, Stanford University, Stanford, USA 94305;Division of Mobile Systems Engineering, College of International Studies, Dankook University, Yongin, Republic of Korea 448-701
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

Citing 5
Cited 0

Fundamentals of statistical signal processing: estimation theory

Fundamentals of statistical signal processing: estimation theory
Microwave Mobile Communications

Microwave Mobile Communications
ML estimation of time and frequency offset in OFDM systems

IEEE Transactions on Signal Processing
A robust timing and frequency synchronization for OFDM systems

IEEE Transactions on Wireless Communications
Cell search in W-CDMA

IEEE Journal on Selected Areas in Communications

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Abstract

A computationally efficient initial synchronization technique is introduced in cellular orthogonal frequency division multiplexing downlink systems, which includes symbol timing estimation, frequency offset estimation, frame synchronization, and cell search. Novel preamble and pilot structures are proposed and a simple three-step synchronization scheme is developed based on a variety of practical conditions such as low computational complexity, time-varying frequency selective fading, limited preamble length, low peak-to-average-power ratio, and noncoherent synchronization with no channel estimation. The proposed three-step synchronization is sequentially described as (1) joint timing and frequency synchronization, (2) frame synchronization and preamble pattern identification (ID), and (3) pilot group ID. Simulation results show that the proposed technique nicely works even at low signal-to-interference-and-noise ratio regions.