Title :
Computational complexity reduced MMSE adaptive array antenna with space-temporal joint equalization
Author :
Ichikawa, Y. ; Tomitsuka, K. ; Obote, S. ; Kagoshima, K.
Author_Institution :
Dept. of Media & Telecommun. Eng., Ibaraki Univ., Hitachi, Japan
Abstract :
A tapped-delay-line adaptive array antenna (TDL-AAA) is proposed for the method of space and temporal (frequency) equalization. However, this method has a drawback that requires many variable taps (AAA elements /spl times/ LE (linear equalizer) taps) and many multiplications. In this paper, in order to reduce the computational complexity, we propose the cascade connection of one adaptive array antenna and one linear equalizer with space and temporal joint equalization. The LE mitigates multipath waves close to the direct wave. The AAA removes only interference users waves. The effectiveness of the proposed method is confirmed by theoretical consideration and computer simulation.
Keywords :
adaptive antenna arrays; antenna radiation patterns; computational complexity; equalisers; interference suppression; least mean squares methods; MMSE; TDL-AAA; cascade connection; computational complexity; interference waves; linear equalizer; multipath waves; space-temporal joint equalization; tapped delay line adaptive array antenna; Adaptive arrays; Adaptive equalizers; Antenna arrays; Computational complexity; Computer simulation; Equations; Frequency; Interference; Linear antenna arrays; Mean square error methods;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.959393
