Title :
Wordlength effect on CMA adaptive antenna with digital beam synthesis initialization
Author :
Boonpoonga, Akkarat ; Tantisopharak, Tanawut ; Sirisuk, Phaophak ; Krairiksh, Monai
Author_Institution :
Dept. of Comput. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand
Abstract :
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.
Keywords :
adaptive antenna arrays; adaptive signal processing; antenna radiation patterns; array signal processing; CMA adaptive antenna; antenna radiation patterns; digital beam synthesis initialization; four-element circular array; overflow phenomena; step-size constant; underflow phenomena; wordlength effect; Adaptive algorithm; Adaptive arrays; Antenna arrays; Circuit synthesis; Convergence; Directive antennas; Interference; Phased arrays; Signal synthesis; Switches;
Conference_Titel :
ITS Telecommunications, 2008. ITST 2008. 8th International Conference on
Conference_Location :
Phuket
Print_ISBN :
978-1-4244-2857-1
Electronic_ISBN :
978-1-4244-2858-8
DOI :
10.1109/ITST.2008.4740224
