A Study on the Carrier Frequency Offset Estimation Methods for the OFDM-based Relay Networks

• Main Authors: Guo-Wei Hsu, 徐國瑋
• Other Authors: Chun-Chyuan Chen
• Format: Others
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/12247490096206765375

碩士 === 國立東華大學 === 電機工程學系 === 101 === In this research, relay network’s excellent property is used to level up system efficiency and signal quality. Affected by frequency error and Doppler shift, carrier frequency offset (CFO) happens. Therefore, improving this disadvantage is the main purpose in this research; besides, it was based on Orthogonal Frequency-Division Multiplexing (OFDM) Function Modulation to analyze a certain relay network. Maximum Likelihood Estimation (MLE) was proposed to deal with carrier frequency offset; data were acquired through computer simulation. Various system parameters were applied to assess the relation between Mean Square Error (MSE) and Signal-to-Noise Ratio (SNR). At the end, with the comparison of Cramer-Rao Lower Bound (CRLB), the research results could be observed and anticipated within the transmission through multipath channel of Additive White Gaussian Noise (AWGN).