Blind Residual Carrier Frequency Offset and Timing Offset Estimation Using Improved Minimum Output Variance Approaches in Uplink MC-CDMA Systems

Authors:
Ann-Chen Chang
Affiliations:
Department of Information Technology, Ling Tung University, Taichung, Taiwan, ROC 408
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

Citing 8
Cited 1

Matrix analysis

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Joint Estimation of the Timing and Frequency Offset for Uplink OFDMA

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An Efficient Maximum Likelihood Carrier Frequency Offset Estimator for OFDM Using Null Subcarriers and Cyclic Prefix

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Joint Carrier Frequency Offset Estimation and Compensation for Downlink Group-Orthogonal Multicarrier CDMA

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ML estimation of time and frequency offset in OFDM systems

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Non-Data-Aided Joint Carrier Frequency Offset and Channel Estimator for Uplink MC-CDMA Systems

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A robust timing and frequency synchronization for OFDM systems

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A Fuzzy MOE Receiver for Uplink MC-CDMA Systems with Carrier Frequency Offset over Multipath Fading Channels

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Symbol Detection of IDMA Systems in the Presence of Carrier Frequency Offsets

Wireless Personal Communications: An International Journal

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Abstract

This paper deals with blind residual carrier frequency offset (CFO) and timing offset (TO) estimation based on minimum output variance (MOV) criterion without devoting training sequence and pilot symbol for uplink multicarrier-code division multiple access (MC-CDMA) systems. It has been shown that the performance of MOV estimator is degraded because the effect of noise and wideband spread-spectrum signals. In conjunction with spreading code-aided and subspace projection techniques, we present an improved code-aided MOV (ICMOV) estimator to achieve the high accuracy estimate for the noisy case. Due to more accuracy residual CFO estimate can provide more accuracy residual TO estimate, this paper also present a decision-directed ICMOV (DD-ICMOV) approach to improve the estimation performance of ICMOV estimator. Computer simulations are provided for illustrating the effectiveness of the proposed approaches.