A study on the application of blind turbo channel estimators to ofdm related systems

✍ Scribed by Kammeyer, Karl-Dirk ;Petermann, Thorsten

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 917 KB
• Volume: 13
• Category: Article
• ISSN: 1124-318X
• DOI: 10.1002/ett.4460130508

✦ Synopsis

Abstract

Communication standards based on coherent data demodulation require an accurate estimation of the channel in order to ensure a reliable transmission. This is a difficult task especially for fast fading channels caused by high‐speed mobile units. In this paper, we compare different nonblind and blind channel estimation approaches for OFDM related systems. Since most blind channel estimators are known to be extremely complex or sensitive towards certain system parameters, we present a novel algorithm which delivers sufficient estimates with comparatively little effort. Furthermore, an iterative channel estimation scheme is shown that leads to significant performance improvements particularly for high speed propagations.