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- W2793504560 abstract "To analyze the performance of orthogonal matching pursuit (OMP)-based compressed channel estimation (CCE) with deterministic pilot patterns, we propose a mathematical framework by defining four normalized mean square errors ( $textrm {NMSE}_{textrm s}$ ): the total NMSE ( $textrm {NMSE}_{textrm T}$ ), the NMSE on dominant channel components ( $textrm {NMSE}_{textrm D}$ ), the NMSE caused by “lost errors” ( $textrm {NMSE}_{textrm L}$ ), and the NMSE caused by “false alarms” ( $textrm {NMSE}_{textrm F}$ ). Then, we derive a formula with a closed form for evaluating the upper bound of $textrm {NMSE}_{textrm D}$ in the ideal case ( $textrm {NMSE}_{textrm {D,UB}}$ ). Using the proposed analytical framework, the main findings include: 1) the $textrm {NMSE}_{textrm {D,UB}}$ is determined by the following four parameters: the deterministic pilot pattern, the maximum Doppler shift, the number of dominant multipath components, and the SNR; 2) the $textrm {NMSE}_{textrm {D,UB}}$ can be viewed as an approximation of practical ${textrm {NMSE}_{textrm T}}$ in the case that the probability of the successes of OMP exceeds a certain threshold, in which both $textrm {NMSE}_{textrm L}$ and $textrm {NMSE}_{textrm F}$ are neglectable; and 3) using linear regression models, the practical bit-error-rate performance also can be predicted well based on the proposed $textrm {NMSE}_{textrm {D,UB}}$ . We believe that the proposed framework provides a useful tool for adaptively optimizing pilot parameters according to rapidly time-varying channel conditions when using OMP-based CCEs in mobile OFDM systems." @default.
- W2793504560 created "2018-03-29" @default.
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- W2793504560 date "2018-05-01" @default.
- W2793504560 modified "2023-09-23" @default.
- W2793504560 title "Performance Analysis of OMP-Based Channel Estimations in Mobile OFDM Systems" @default.
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- W2793504560 doi "https://doi.org/10.1109/twc.2018.2813380" @default.
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