Wireless network dynamic frequency selection

C Tsien, J Liu - US Patent App. 10/810,532, 2005 - Google Patents
BACKGROUND Wireless networks typically utilize one or more “channels” in a frequency
spectrum. Some of the channels may also be used by other types of systems, such as radar …

Detection of radio frequency interference in wireless communication systems

S Mehrabanzad, S Ananthaiyer, PA Humblet - US Patent 7,801,487, 2010 - Google Patents
BACKGROUND Cellular wireless communications systems are designed to serve many
access terminals distributed in a large geographic area by dividing the area into cells. At the …

Communication in a wireless network using multiple antennae

GC Li, JZ Zhu - US Patent App. 11/561,317, 2008 - Google Patents
BACKGROUND 0002 The development and popularity of wireless elec tronic
communication in recent years has dramatically increased resulting in wireless local area …

Modifying hopping sequences in wireless networks

JSC Chen, BE Schein - US Patent 7,366,223, 2008 - Google Patents
The present invention applies to the field of wireless communications systems and, in
particular, to modifying hopping sequences used for communications channels. 10 2 …

System and method for dynamic frequency selection based on spectrum etiquette

B Ji - US Patent 7,840,187, 2010 - Google Patents
BACKGROUND Wireless communications systems generally use multiple frequencies to
provide greater bandwidth than would be pos sible using a single frequency. Such systems …

Techniques to manage channel prediction

Q Li, XE Lin - US Patent 7,522,555, 2009 - Google Patents
BACKGROUND In a wireless communication system, wireless communi cation devices may
transmit and/or receive radio frequency (RF) signals through one or more antennas. Some …

Techniques to detect radar in a communication signal

U Lemberger, J Myszne, G Basson - US Patent 7,433,383, 2008 - Google Patents
BACKGROUND In a wireless communication system, wireless communi cation devices may
transmit and/or receive information using radio frequency (RF) signals. Since RF spectrum …

Techniques to enhance diversity for a wireless system

N Himayat, S Sandhu - US Patent 8,060,033, 2011 - Google Patents
BACKGROUND Some wireless systems may use multiple antennas, such as a multiple-
input, multiple-output (MIMO) system. MIMO systems may use multiple antennas at both the …

Communications security

K Sood, J Walker - US Patent 7,624,271, 2009 - Google Patents
BACKGROUND Communications nodes in a wireless network typically communicate using
radio frequency signals, although other forms of electromagnetic radiation may be utilized as …

Dynamic frequency selection and radar detection with a wireless LAN

CC Tsien - US Patent 7,155,230, 2006 - Google Patents
BACKGROUND Wireless local area network (LAN) equipment operating in a 5 GHZ band
may have dynamic frequency selection (DFS) capability based on European Radio …