Directional antenna physical layer steering for WLAN

Details Directional antenna physical layer steering for WLAN Directional antenna physical layer steering for WLAN

2006-06-13

2006-06-13

Issing, Gregory C. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including directive communication system

C455S277200

Reexamination Certificate

active

07061427

ABSTRACT:
A technique for steering a directional antenna such as may be used in a Wireless Local Area Network (WLAN) device. The technique detects signal parameters during reception of short sync pulses in the very beginning portion of a Packet Protocol Data Unit (PPDU) frame. As a result, the antenna can be steered to an optimum direction for reception prior to receiving other portions of a preamble that may be needed to acquire carrier signal phase and frequency.

REFERENCES:
patent: 5530926 (1996-06-01), Rozanski
patent: 5748676 (1998-05-01), Mahany
patent: 6304215 (2001-10-01), Proctor et al.
patent: 6456675 (2002-09-01), Wagner et al.
patent: 2003/0119468 (2003-06-01), Meehan et al.
Kalis, Antonis et al, “Relative Direction Determination in Mobile Computing Networks,” IEEE Instrumentation and Measurement Tech Conf, Budapest, May 2001, pp. 1479-1484.
IEEE Std 802.11a-1999 (Part 11 : Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications High Speed Physical Layer in 5 GHz Band, 1999, pp. 1-83.

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