Detecting a narrow band ranging signal in an OFDM frame

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United States of America Patent

PATENT NO 9320003
APP PUB NO 20150146712A1
SERIAL NO

14091719

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Abstract

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Techniques are presented for a first device configured to be in communication with a second device in a digital communication system to receive an orthogonal frequency division multiplexed (OFDM) ranging signal from the second device. The OFDM ranging signal comprises a plurality OFDM symbols that encode a known bit sequence within a subset of available OFDM communication subcarriers and a subset of available time slots. The OFDM ranging signal is analyzed to determine a timing offset for the second device due to a time for signals to travel between the first device and second device over a communication channel. A message is transmitted from the first device to the second device, the message including information configured to indicate the timing offset.

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Patent Owner(s)

Patent OwnerAddress
CISCO TECHNOLOGY INC170 WEST TASMAN DRIVE SAN JOSE CA 95134-1706

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jin, Hang Plano, US 170 2881

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