Performance Analysis of a New Preamble-Based SNR Estimation Algorithm

Changwoo SEO  Insik CHO  Sherlie PORTUGAL  Jaeho PARK  Gihwan PARK  Taejin JUNG  Intae HWANG  Huaping LIU  Cheolwoo YOU  

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.5    pp.1498-1501
Publication Date: 2011/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1498
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MIMO,  OFDM,  CSI,  preamble,  SNR,  

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In recent years, techniques such as multiple input multiple output (MIMO) and orthogonal frequency division multiplexing (OFDM) have been developed and combined in MIMO-OFDM systems to provide higher data rates. In addition, the system can be optimized by setting modulation and coding adaptively according to the channel conditions. The overall system performance depends on how accurately the system obtains the channel state information (CSI) and feeds it back to the transmitter. In this paper, we propose a signal-to-noise-ratio (SNR) estimation algorithm in which the preamble is known by both sides of the transceiver. Through simulations of several channel environments, we prove that our proposed algorithm is more accurate than traditional algorithms.