[1] Kehu Yang, Takashi Ohira, Yimin Zhang, and Chong-Yung Chi,
    "Super-exponential blind adaptive beamforming",
    IEEE Trans.Signal Process., vol. 52, pp.1549-1563, Jun. 2004.
[2] Kehu Yang and Takashi Ohira,
    "Realization of space-time adaptive filtering by employing Electronically steerable passive
    array adiator antennas",
    IEEE Trans.Antennas and Propaga., vol. 51, p.p. 1476-1485, Jul. 2003.
[3] Yimin Zhang, Kehu Yang, and Moeness G. Amin,
    "Adaptive Array Processing for Multipath Pading Mitigation via Exploitation of Filter Banks",
    IEEE Trans.Antennas and Propaga., vol. 49, pp505-516, Mar. 2001.
[4] Kehu Yang, Yimin Zhang, and Yoshihiko Mizuguchi,
    "A Signal Subspace-Based Subband Approach to Space-Time Adaptive Processing for Mobile
    Communications",
    IEEE Trans. Signal Process., vol. 49, pp401-413, Feb. 2001.