US 2014/0211779 A1 · SCALABLE SYNCHRONIZATION FOR DISTRIBUTED MULTIUSER MIMO

Abstract

Each wireless access point in a network may transmit pilot bursts; receive pilot bursts; determine the timing, carrier frequency, and/or sampling frequency of each received pilot burst; determine an offset between the timing, carrier frequency, and/or sampling frequency of each received pilot burst and its own transmitted signals; and deliver one or more of these determined offsets to a computer server. The computer server may receive these offsets and, based on them, compute and deliver to each wireless access point a timing, carrier frequency, and/or sampling frequency correction factor. Each wireless access point may adjust its transmitted timing, carrier frequency, and/or sampling frequency in accordance with these correction factors.

Claims20

Dependent claims

A wireless access point for a computer network system having multiple wireless access points comprising:

a transmitter having a configuration that wirelessly transmits signals having a timing and carrier frequency, including pilot bursts;
a receiver having a configuration that wirelessly receives signals having a timing and carrier frequency, including pilot bursts;
and
a processing system having a configuration that:
causes the transmitter to transmit pilot bursts;
determines the timing and carrier frequency of each received pilot burst;
determines a timing offset between the timing of each received pilot burst and the timing of the transmitted signals;
and
determines a carrier frequency offset between the frequency of each received pilot burst and the carrier frequency of the transmitted signals.

6 more elements

A computer server for a computer network that includes wireless access points comprising:

a network communication system having a configuration that communicates with the wireless access points through the computer network;
and
a processing system having a configuration that:
receives a timing offset and a carrier frequency offset from each of the wireless access points that is representative of a timing offset and a carrier frequency offset between the wireless access point and another of the wireless access points;
and
for each wireless access point:
computes a timing correction factor and a carrier frequency correction factor based on the timing and carrier frequency offsets received from the wireless access points;
and
causes the timing and carrier frequency correction factors for the wireless access point to be delivered to the wireless access point through the computer network system.

6 more elements

Dependencies are inferred from the claim text.

Scalable synchronization for distributed multiuser mimo

Life of this patent

Scalable synchronization for distributed multiuser mimo

Life of this patent

Abstract

Claims20