[PDF] Top 20 Reducing the Leakage in OFDM Systems by Using Low Complexity DFT- Based Channel Estimation

... I.INTRODUCTION: Although the linear minimum imply square error(LMMSE) estimator [1] is perfect in the sense of the imply rectangular error (MSE) efficiency, the discrete Fourier transform(DFT)- founded estimator ... See full document

... (OFDM-) based amplify-and-forward (AF) cooperative communication is an effective way for single-antenna systems to exploit the spatial diversity gains in frequency-selective fading channels, but the ... See full document

... of OFDM-based systems, the channel coefficients should be estimated with minimum ...Various OFDM channel estimation schemes have been proposed in the ...aided ... See full document

... (CS)-based channel estimation technique for asymmetrically clipped optical-orthogonal frequency division multiplexing (ACO-OFDM) visible light communications (VLC) in 5G ...and low ... See full document

... many channel estimation techniques. Three channel estimation algorithms have been presented and compared in [4] for OFDM ...has low complexity, but larger Mean Square ... See full document

... significant complexity reduction can be achieved by rank reduction ...likelihood estimation (RRMLE) has been derived in [27] for the ML estimation of the regression matrix in terms of the data ... See full document

... batch channel estimation algorithm for OFDM systems in unknown wireless fading ...fading channel based on the Karhunen-Loeve (KL) orthogonal expansion and finds MMSE estimates of ... See full document

... conventional DFT method. After IDFT of partial frequency response, the channel impulse response will leak to all taps in time ...and leakage power are mixed up, the conventional DFT method ... See full document

... in OFDM systems, data-aided and non-data-aided estimation (also known as blind ...control channel, re- ducing achievable data ...parameters based on received information and utilize the ... See full document

... of OFDM receiver is the channel estimation ...Efficient channel estimation has a direct impact on the bit error rate (BER) performance of the OFDM ...designing channel ... See full document

... as follows. First, in (16), we discard the kth sample ˘g ZF (k) with lower energy than a given threshold, the corresponding ˘g(k), and the corresponding noise term ˘ w(k). Next, the matrix size of S is reduced by ... See full document

... radio channel is usually frequency selective and time variant. In OFDM system, modulation may be coherent or ...differential. Channel state information (CSI) is required for the OFDM receiver ... See full document

... channel estimation over LS estimate . In , a low- rank approximation is applied to linear MMSE by using the frequency correlation of the channel to eliminate the major drawback of MMSE, ... See full document

... the channel state ...for channel estimation will be saved which makes a big difference for actual communication ...lower complexity and similar performance as ESPRIT without much computational ... See full document

... MIMO-OFDM channel estimation based on compressed sensing over frequency offset ...new OFDM frame structure, which the major benefit is low implementation ...Then, based on ... See full document

... Several low-complexity approximations of the BCJR algorithm have been proposed in the literature, mainly in the context of iterative soft decoding of concatenated codes, referred to as turbo ...reduces ... See full document

... the channel estimator is based on a cascaded 2×1D LMMSE technique during 14 OFDM symbols,as shown in ...technique using the estimated ...LS channel estimation in which the PDP ... See full document

... Introduction of CS has revolutionized many areas in signal processing, where there were limited scopes. Some of the major contributions are faster MRI, high quality image and video acquisition using single pixel ... See full document

... The frequency selective fading, is caused by multipath could lead to carriers used, being heavily attenuated due to destructive interference at the receiver. The result of this is the carriers being lost in the noise ... See full document

... (ST) based channel estimation techniques have been proposed in ...the channel estimate at the transmitter in a ST based closed loop MIMO-OFDM system is ...the channel ... See full document