[PDF] Top 20 Complexity Reduction Techniques for MMSE Channel Estimator in OFDM

... the OFDM system, ...the channel energy is contained in first eight samples, while the remaining samples are mostly filled with unwanted ...for channel estimation and reduces the size of ' to ( ... See full document

... a channel estimation approach in time domain for both space-frequency OFDM (SF-OFDM) and space-time OFDM (ST-OFDM) systems based on AR channel ...time-domain channel ... 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 the ... See full document

... the OFDM system, the signal after PAPR reduction undergoes distortion while travelling through the wireless ...PTS techniques the effects of the channel are estimated and compensated with LS ... See full document

... significant complexity reduction can be achieved by rank reduction ...these techniques, the eigenvalue decomposition (EVD) and its related singular value decomposition (SVD) techniques ... See full document

... In OFDM system, the radio channels which we use are frequency selective and vary with time for wireless wideband mobile communication ...(MMSE) estimator for estimating the channel of ... See full document

... fading channel can be used in the design for computing the impulse response of the channel in case of OFDM ...2-D channel estimators such as Weiner filter have optimum ...associated ... See full document

... up channel estimation accuracy in OFDM system as a result of channel state info is needed for detection at receiver and its accuracy affects the performance of system and it's essential to improve ... See full document

... the channel rather than the instantaneous ...the channel, and constructing the equalizer requires some information of the fading channel impulse ...adaptive channel estimation, either blind or ... See full document

... SUMMARY In this paper we have proposed a channel estimation method, which is based on a low-complexity decision directed MMSE FS-CLR estimator combined with a robust time-domain FS-CIR p[r] ... See full document

... full-complexity MMSE and the RC-MMSE SS-CIR estimators described in Sections ...above-mentioned OFDM and MC-CDMA ...128-subcarrier OFDM/MC-CDMA symbols. It can be seen in Figure 3(a), ... 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

... 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

... promising techniques for wireless communication systems, including the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) [1], [2] and IEEE ...receiver techniques of MIMO-OFDM systems ... See full document

... CDMA) techniques [1] are capable of satisfying these requirements, since they are capable of coping with highly time-variant wireless channel ...the channel conditions ...robust channel ... See full document

... Super-Resolution Channel Estimation At the receiver, the equivalent baseband channel frequency response (CFR) H(f) can be expressed as Where superscripts iand jin (1) are omitted for convenience ⁄ is the ... See full document

... pilot-based channel estimation we are going to estimate the channel conditions (specified by or ) given the pilot signals (specified by matrix X or vector ... See full document

... adjacent OFDM symbols. Moreover, path gains during adjacent OFDM symbols are also correlated due to the temporal continuity of the CIR, so As in (8) for several adjacent OFDM symbols are also ...qth ... See full document

... In this section, we verify the optimality of the training signals through extensive computer simulations. We con- sider a MIMO-OFDM system where the number of TX antennas is Q = 4, the number of RX antennas is P = ... See full document

... Partial transmit sequence (PTS) is a promising technique for reducing the high peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. In Conventional PTS, multiple ... See full document