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Wordlength effect on CMA adaptive antenna with digital beam synthesis initialization

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4 Author(s)
Boonpoonga, A. ; Dept. of Comput. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand ; Tantisopharak, T. ; Sirisuk, P. ; Krairiksh, M.

This paper investigates the wordlength effect on the CMA adaptive antenna with digital beam synthesis initialization. The antenna is a four-element circular array whose main beam can be switched into different directions by using digital beam synthesizer. A beam obtained from digital beam synthesis is exploited as an initial beam for CMA. A weight vector for generating initial beams of CMA is chosen by determining radiation patterns. The SINR of the digital beam synthesis-based CMA adaptive antenna with different wordlengths are shown. Moreover, the step-size constant of CMA is also investigated and properly chosen to avoid underflow and overflow phenomena.

Published in:

ITS Telecommunications, 2008. ITST 2008. 8th International Conference on

Date of Conference:

24-24 Oct. 2008