[PDF] Top 20 Iterative ML estimation for frequency offset and time synchronization in OFDM systems

... According to the proposed iterative approaching algorithm, the global maximum of log-likelihood function can be definitely found to achieve both frequency and time synchronization[r] ... See full document

... CFO estimation method for such ...method and then maximizes the corresponding likelihood function. In addi- tion to the standard calculations, this method requires an extra procedure to solve ... See full document

... Doppler frequency of approximately 463 Hz when the carrier frequency is 5 GHz, we plot the corresponding MSE performance in ...the estimation performance is degraded due to the fact that the ... See full document

... Residual Frequency Tracking Error In the acquisition stage, we assume that the residual fre- quency error after the frequency tracking stage is an integral multiple of the subcarrier ...residual ... See full document

... The carrier frequency offset can he estimated by first calculating the pilot-suhcarrier phase difference between two OFDM symbols, removing the quantity contributed by the [r] ... See full document

... typical OFDM system based on IEEE 802.11g for WLAN was adopted as a reference-design platform to evaluate the per- formance of the proposed ...employed in the simulation platform were OFDM ... See full document

... accurate estimation of the frequency offset is ...approaches for the frequency-offset estimation using the pre- amble data [6], [7], the cyclic prefix data [8], [9], or the ... See full document

... EM-based iterative re- ceivers for OFDM and BICM/OFDM systems in doubly selective fading ...varies in a linear fashion, we first analyze the ICI effect in ... See full document

... despreading and MAI suppression, and pilot symbols assisted frequency offset estimation, channel vector estimation and RAKE combining give the desired signal ... See full document

... simple, and the computational complexity is ...shown in Fig. 1, a large EVS will be induced in the full-loaded scenario (Δq = 1), and the perfor- mance of the proposed method will seriously be ... See full document

... Symbol-timing and frequency offset estimation for OFDM are widely discussed in the ...available for the estimation of sampling clock ...clock offset ... See full document

... 2. OFDM System Model A simplified OFDM system model is shown in ...1. In the figure, X l ,k / ˜X l ,k is the transmitted/received FD data on the k-th subcarrier of the l-th symbol, 1/T S is ... See full document

... Hung and David ...channel estimation technique for multicarrier ...channel frequency response between two nearby subcarriers as the product of a linear function and a linear-phase ... See full document

... standard for wireless broadcast of MPEG-2 video [1]. In order to provide the high data rate required for video transmission, concatenated-coded orthogonal frequency division multiplexing ... See full document

... Effect in a Multipath Environment: In this example, we examine the CFO effect when the channel has the multipath frequency-selective ...be and , whereas the other param- eters remain the same ... See full document

... approach. In the simulations, the timing and frequency synchronization is assumed to be performed before channel ...CP-free OFDM system with one transmit antenna and one receive ... See full document

... that for better characterizations of synchronization errors under a practical communication environment, that is, in doubly-selective fading channels, we analyze joint e ffects of the mentioned three ... See full document

... radio frequency (RF) to baseband and the real and imaginary compo- nents of the base-band complex signal are and ...digitally frequency discriminated, and low-pass filtered to ... See full document

... Terms— Estimation, maximum Doppler frequency, Ri- cian ...communication systems, multipath propagation usually gives rise to a fading ...moving in such a multipath environment. It distorts the ... See full document

... Yang and Jingshown Wu, Senior Member, IEEE Abstract—In this letter, we propose a timing synchronization scheme for a dual antenna system in Rayleigh-fading environ- ...the ... See full document