Dong Dong Wang

US Patent:

7917107, Mar 29, 2011

Filed:

Mar 23, 2006

Appl. No.:

11/387252

Inventors:

Daqing Gu - Burlington MA, US
Andreas F. Molisch - Arlington MA, US
Jinyun Zhang - Cambridge MA, US
Hongyuan Zhang - Raleigh NC, US
Dong Wang - Newark DE, US

Assignee:

Mitsubishi Electric Research Laboratories, Inc. - Cambridge MA

International Classification:

H04B 7/08

US Classification:

455132, 455140, 375347

Abstract:

A method for selecting antennas in a multiple-input, multiple-output wireless communications network that includes multiple stations is presented. Each station includes a set of transmit RF chains and a set of receive RF chains, and each RF chain is connectable to a set of antennas. A first station transmits a training frame for each possible subset of the set of antennas, and the set of transmit RF chains are connected to the subset of antennas according to a connection mapping rule while transmitting each training frame. A subchannel matrix is estimated in a second station for each frame. The subchannel matrices are combined to obtain a complete channel matrix. A particular subset of the antennas is selected according to the complete channel matrix. The set of transmit RF chains is connected to the selected particular subset of antennas to transmit data from the first station to the second station.

US Patent:

20180001041, Jan 4, 2018

Filed:

Jan 12, 2016

Appl. No.:

15/546774

Inventors:

- EINDHOVEN, NL
FRANCESCO VICARIO - BOSTON MA, US
DONG WANG - CAMBRIDGE MA, US
NIKOLAOS KARAMOLEGKOS - NEW YORK NY, US
NICOLAS WADIH CHBAT - WHITE PLAINS NY, US

International Classification:

A61M 16/00
A61B 5/087
A61B 5/085
G06F 19/00

Abstract:

A medical ventilator () performs a method including: receiving measurements of pressure of air inspired by or expired from a ventilated patient () operatively connected with the medical ventilator; receiving measurements of air flow into or out of the ventilated patient operatively connected with the medical ventilator; dividing a breath time interval into a plurality of fitting regions (); and simultaneously estimating respiratory system's resistance and compliance or elastance, and respiratory muscle pressure in each fitting region by fitting to a time series of pressure and air flow samples in that fitting region. In one approach, the fitting includes parameterizing the respiratory muscle pressure by a continuous differentiable function, such as a polynomial function, over the fitting region. In another approach, the fitting is to an equation of motion of the lungs in each fitting region, while monotonicity constraints and inequalities bounding at least the respiratory muscle pressure P(t) and respiratory system's resistence R and compliance C are applied to the respiratory muscle pressure in each region.