Daniel A Lyons

US Patent:

20060072524, Apr 6, 2006

Filed:

Oct 1, 2004

Appl. No.:

10/957107

Inventors:

Eldad Perahia - Sunnyvale CA, US
Bretton Douglas - San Jose CA, US
Brian Hart - Milpitas CA, US
Daniel Lyons - Chippewa Lake OH, US

International Classification:

H04Q 7/24

US Classification:

370338000

Abstract:

A method and an apparatus in a first wireless station of a network transmitting to a second wireless station. The network uses multi-tone OFDM signals. The first station includes multiple antennas and a receive and a transmit signal path per antenna. Each receive signal path includes a discrete Fourier transformer determining the tones in a received signal, and each transmit signal path includes an inverse discrete Fourier transformer converting tones to a signal. The method includes determining channel estimates for each tone and each receive path while receiving from the second station, determining transmit weights to transmit to the second station, tone-by-tone weighting a signal for transmission to the second station to produce weighted tone sets for each transmit signal path, and transmitting the weighted tone sets. The first station is configured so that the weighting produces additive beamforming without the second station needing multiple antennas.

US Patent:

20230034115, Feb 2, 2023

Filed:

Jul 29, 2021

Appl. No.:

17/444008

Inventors:

- San Jose CA, US
Ardalan ALIZADEH - Milpitas CA, US
Daniel J. LYONS - Medina OH, US
Matthew A. SILVERMAN - Shaker Heights OH, US

International Classification:

H04W 56/00
H04L 27/26

Abstract:

Aspects discussed herein include a method and associated network device and computer program product. The method includes receiving a network packet, and estimating, using a preamble of the network packet, a power distribution corresponding to a plurality of subcarriers of a channel. The method further includes estimating a carrier frequency offset using the power distribution, and estimating a clock offset using the carrier frequency offset.