[PDF] Top 20 A Low-Complexity Time-Domain MMSE Channel Estimator for Space-Time/Frequency Block-Coded OFDM Systems

... diversity OFDM sys- tems has attracted much attention with pioneering works by Li et ...robust channel estimator for OFDM systems with transmitter diversity has been first de- veloped ... See full document

... with OFDM over time frequency selective channels has been pre- ...slow time varying environments where the channel time varia- tion is slow but when the channel variation ... See full document

... the complexity is high compared to the ML or LS estimators. The LS and MMSE method were compared in and for OFDM systems and the MMSE was found to outperform the ML in low ...the ... See full document

... of OFDM signalling avoids ISI arising due to channel memory, fading multipath channel still introduces random attenuations on each ...simple frequency-domain equalization, which divides ... See full document

... partitioned space- time multiuser receivers based on the linear decorrelator [6] and on the linear MMSE estimator [6], as well as two par- titioned receiver structures based on nonlinear ... See full document

... and channel estimation problem for Alamouti space-time block-coded (STBC) orthogonal frequency-division multiplexing (OFDM) wireless ...efficient ... See full document

... The MMSE estimator minimizes the MSE of the channelestimates, but the complexity is high compared to the ML or LS ...and MMSE method were compared in and for OFDM systems and the ... See full document

... Space-time coded orthogonal frequency division multiplexing (OFDM) transmitter diversity techniques have been shown to pro- vide an efficient means of achieving near optimal diversity ... See full document

... Multiband OFDM (MB-OFDM) is the main solution considered for high rate UWB ...inherent frequency diversity, each OFDM symbol obtained from a 128-point inverse fast Fourier transform (IFFT), is ... See full document

... Space-time block-codes (STBC) schemes have emerged as a powerful transmit diversity technique to combat fading in wireless ...successful space-time coding scheme was first proposed by ... See full document

... single-output OFDM systems, space-time coded OFDM systems have been receiving significant ...that space- time coding can be used to achieve high data rates ... See full document

... selective channel equalization, which is more challenging due to the time variation of the ...For OFDM systems with doubly selective channels, low- complexity minimum ... 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 estimators for ... See full document

... communication systems faced two major impairments as attenuation due to multipath in the propagation media and interference from other ...Orthogonal Frequency Division Multiplexings (OFDM), capable ... See full document

... can be modeled as time-varying correlated noise [23]. In [21], the truncation of high order Taylor series is used for acquiring the approximate CFO estimate. One of the two proposed methods in [22] must resort to ... See full document

... wireless systems are ex- pected to support both variable-rate as well as extremely high-bit-rate services in a wide range of different propagation ...a time-invariant wireline-like quality of service and ... See full document

... and OFDM data ...relatively low complexity. Since the OFDM block length is usually large such interference, cannot be totally eliminated even when the channel estimation is ... See full document

... In order to obtain the precoder and equalizer matrices for GMD ZF based transceiver, the time domain MIMO-OFDM channel matrix 𝐻 is first converted to equivalent frequency domain block di[r] ... See full document

... in frequency domain for increasing the bandwidth ...In OFDM, the sub channels are the result of division of the available bandwidth which results in transformation of the frequency selective ... See full document

... require Channel State Information to perform ...receiver, channel estimation is performed and the estimates are used ...on space-time coding ... See full document