Lastest Articles

Using Kerberos, RADIUS, and LDAP for WLAN Authentication While wireless networking applications benefit from location independence and freedom of mobility, they all have the same security challenge— authentication. When considering a security implementation, authentication is a key component of any security ... [full story]

Wireless Transmission MediaWireless LANs employ radio frequency (RF) and infrared (IR) electromagneticairwaves4 to transfer data from point to point. The Federal Communications330 Chapter SevenAM Broadcast900 MzBand2.4 MzBand5 MzSimple Wireless LAN Bandconfiguration.Industrial, Scientific andMedical (ISM) BandsCellular(840 MHz)ViableLightX-Rays7-1 WLAN overview. (courtesy of ... [full story]

Advantages and Disadvantages of WLANs WLANs have advantages and disadvantages when compared with wired LANs. A WLAN will make it simple to add or move workstations and to install access points to provide ... [full story]

Adaptive Receiver Structures We next consider adaptive algorithms for sequentially estimating the blind linear detector. First, we address adaptive implementation of the blind channel estimator discussed above. Suppose that the signal subspace Us is known. Denote by z[i] the projection of ... [full story]

NAHJ Subspace Tracking The algorithm we present here was developed in [411, 412]. It is a member of the QR-Jacobi family in the sense that it uses Givens rotations during the updating process. However, this algorithm avoids the QR step entirely. ... [full story]