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A Generalized Method of Moments Detector for Block Fading SIMO Channels

In English

Författare

Summary, in English

In this letter we apply the Generalized Method of Moments (GMM), widely used in econometrics, to receivers operating with imperfect channel state information (CSI) of singleinput-multiple-output (SIMO) block-fading channels where a single pilot symbol is used. The GMM results in the standard maximum ratio combining (MRC) receiver, but with an improved channel estimate. Although not our goal at the outset, this result reveals an inherent capability of the GMM to improve any channel estimate through filtering of the initial channel estimate with a matrix that is constructed from the received signals. The filtering involves a matrix inverse of size min {T, M}, where M is the number of receive antennas, and T + 1 is the coherence interval of the channel. The gain over an MRC receiver, using a scaled version of the pilot observation as channel estimate, lies in the range 0.1-3 dB depending on the system configuration.
A coherence interval of about 5 symbol intervals is sufficient to reach these gains

Publiceringsår

2016-07-01

Språk

Engelska

Sidor

1477-1480

Publikation/Tidskrift/Serie

IEEE Communications Letters

Volym

20

Issue

7

Dokumenttyp

Artikel i tidskrift

Förlag

IEEE - Institute of Electrical and Electronics Engineers Inc.

Ämne

  • Telecommunications

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1089-7798