Sparse Channel Estimation for Interference Limited OFDM Systems and Its Convergence Analysis

Multi Stage Kalman Filter (MSKF) Based Time-Varying Sparse Channel Estimation with Fast Convergence

“…This is unlike the full channel matrix used traditionally in data estimation; implying that the reduced equalizer methodology has transformed sparse channel estimation problem to that of TV reduced-rank filtering. The equivalence between the reduced equalizer and sparsity promoting Bayesian estimator [26], [27] is shown in [12] (Section V), by considering (sparse) channel's prior probability density function (pdf) as f ((H(n, l k ) (i,j) ) = [(H(n, l k )) (i,j) ] −1/2 , (i. e., magnitude of a channel tap will have a low value with high probability, and a large value with low probability [26]). Then equations ( 26)-( 34) in [12] show that this (prior) pdf leads us to a reduced rank filter.…”

Channel Sounding and Measurements for Pico Cells for LTE and Future Wireless Networks

“…The popular COST 207 and SuI channel models have been considered in this paper for comparison with real channel measurements for various terrains. Recent work on performance analysis of wireless protocols on the COST 207 channel model [25][26] , and SuI channel model [24][25][26][27] are available.…”

Performance analysis of OFDM based 3-hop AF relaying network over mixed Rician/Rayleigh fading channels

“…Appendix D. Proof of Lemma 4 410 Generalized conditional SEP expression for M I × M Q -RQAM scheme can be given as (e|η) and P out,LB (η), respectively are substituted in (16). Finally, solving the required integrals with the aid of [48, (3.381.4), (7.522.9)], ASER expression of 32-XQAM scheme is expressed as (19).…”

“…Although fixed gain relaying is cost effective and easy to deploy, variablegain relaying provides additional performance gain as compared to fixed-gain 35 relaying, and hence, is considered in this work [14,15].Additionally, orthogonal frequency division multiplexing (OFDM) is also one of the promising multicarrier modulation schemes which provides spectrally efficient high data rate communication with improved robustness even in severely degraded channel conditions [16,17]. Different wireless communication stan-40 dards such as IEEE 802.11a/g/n/ac, IEEE 802.16j/m, IEEE 802.22 [18,19], 3GPP LTE-Advanced, and digital video broadcasting [20,21] have adopted OFDM as their main modulation technique, and is also a possible modulation scheme for 5G standard [22].Thus, cooperative communication in conjunction with OFDM provides im-45 proved spectral efficiency, greater coverage and capacity enhanced link reliability and robustness at high data-rate, which provides a solid platform for future wireless communication systems [23]. For further data-rate improvement, higher order modulation schemes such as family of quadrature amplitude modulation (QAM) (i.e.…”

“…Additionally, orthogonal frequency division multiplexing (OFDM) is also one of the promising multicarrier modulation schemes which provides spectrally efficient high data rate communication with improved robustness even in severely degraded channel conditions [16,17]. Different wireless communication stan-40 dards such as IEEE 802.11a/g/n/ac, IEEE 802.16j/m, IEEE 802.22 [18,19], 3GPP LTE-Advanced, and digital video broadcasting [20,21] have adopted OFDM as their main modulation technique, and is also a possible modulation scheme for 5G standard [22].…”