Excellence in Research and Innovation for Humanity

Young Hwan You

Publications

3

Publications

3
466
An Improved Integer Frequency Offset Estimator using the P1 Symbol for OFDM System
Abstract:
This paper suggests an improved integer frequency offset (IFO) estimation scheme using P1 symbol for orthogonal frequency division multiplexing (OFDM) based the second generation terrestrial digital video broadcasting (DVB-T2) system. Proposed IFO estimator is designed by a low-complexity blind IFO estimation scheme, which is implemented with complex additions. Also, we propose active carriers (ACs) selection scheme in order to prevent performance degradation in blind IFO estimation. The simulation results show that under the AWGN and TU6 channels, the proposed method has low complexity than conventional method and almost similar performance in comparison with the conventional method.
Keywords:
OFDM, DVB-T2, P1 symbol, ACs, IFO.
2
5119
A Robust Frequency Offset Estimation Scheme for OFDM System with Cyclic Delay Diversity
Abstract:
Cyclic delay diversity (CDD) is a simple technique to intentionally increase frequency selectivity of channels for orthogonal frequency division multiplexing (OFDM).This paper proposes a residual carrier frequency offset (RFO) estimation scheme for OFDMbased broadcasting system using CDD. In order to improve the RFO estimation, this paper addresses a decision scheme of the amount of cyclic delay and pilot pattern used to estimate the RFO. By computer simulation, the proposed estimator is shown to benefit form propoerly chosen delay parameter and perform robustly.
Keywords:
OFDM, cyclic delay diversity, FM system, synchronization
1
6528
Low-complexity Integer Frequency Offset Synchronization for OFDMA System
Abstract:
This paper presents a integer frequency offset (IFO) estimation scheme for the 3GPP long term evolution (LTE) downlink system. Firstly, the conventional joint detection method for IFO and sector cell index (CID) information is introduced. Secondly, an IFO estimation without explicit sector CID information is proposed, which can operate jointly with the proposed IFO estimation and reduce the time delay in comparison with the conventional joint method. Also, the proposed method is computationally efficient and has almost similar performance in comparison with the conventional method over the Pedestrian and Vehicular channel models.
Keywords:
LTE, OFDMA, primary synchronization signal (PSS), IFO, CID