Cramer - Rao Bound Based Mean-Squared Error and Throughput Analysis of Superimposed Pilots for Semi-Blind Multiple-Input Multiple-Output Wireless Channel Estimation

Provided by: John Wiley & Sons
Topic: Mobility
Format: PDF
This paper presents a study of the Mean-Squared Error (MSE) and throughput performance of Superimposed Pilots (SP) for the estimation of a Multiple-Input Multiple-Output (MIMO) wireless channel. The Cramer-Rao Bound (CRB) is derived for SP based estimation of the MIMO channel matrix. Employing the CRB analysis, it is proved that the asymptotic MSE bound is potentially 3 dB lower than the MSE performance of the existing SP Mean based Estimation (SPME) schemes. Motivated by this observation, a novel SP semi-blind scheme is presented for MIMO channel estimation. This scheme asymptotically achieves the CRB and hence has a lower MSE of estimation when compared with SPME schemes.

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