Totally blind channel identification by exploiting guard intervals

✍ Scribed by Jonathan H. Manton; Walter D. Neumann

• Book ID: 104300575
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 158 KB
• Volume: 48
• Category: Article
• ISSN: 0167-6911
• DOI: 10.1016/s0167-6911(02)00278-5

✦ Synopsis

Blind identiÿcation techniques estimate the impulse response of a channel by exploiting known ÿnite alphabet or statistical properties of the transmitted symbols. Alternatively, oversampling the output is known to introduce dependencies also exploitable for channel identiÿcation. This paper proves the feasibility of estimating the channel by relying instead on the short sequences of zeros, known as guard intervals or zero padding, introduced between transmitted blocks by a number of communication protocols. Since no property of the transmitted information symbols is assumed, the method is called totally blind channel identiÿcation. It is proved that totally blind channel identiÿcation requires only two received blocks to estimate the channel.