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Devang M Topiwala

from Brookline, NH
Age ~35
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Also known as:
Devang E Topiwala
Related to:
Thomas S Mccrea, 46Chantal N Plante, 61
Connected to:
Dharmesh N Topiwala, 47Dilpesh V Topiwala, 41Joshna Topiwala, 54Helidon Topjanasi, 41Alyssa R Topka, 38Amadeusz Topka, 34Jessica L Topka, 42Mary A Topka, 76Mercan Topkara, 46Randall S Topken, 57

Devang Topiwala Phones & Addresses

  • Brookline, NH
  • Framingham, MA
  • Merrimack, NH
  • Nashua, NH
  • Chattanooga, TN
  • Dallas, TX

Publications

Us Patents

Angle Of Arrival Measurements Using Rf Carrier Synchronization And Phase Alignment Methods

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US Patent:
20200386844, Dec 10, 2020
Filed:
Apr 21, 2020
Appl. No.:
15/929279
Inventors:
- Billerica MA, US
Cuneyt Demirdag - Nashua NH, US
Glen Wolverton - Holden MA, US
Devang Topiwala - Nashua NH, US
Paul McFarthing - Boston MA, US
International Classification:
G01S 3/48
H04L 7/00
H04B 7/06
G01S 3/18
H04L 25/02
H04W 56/00
H04B 7/08
G01S 3/46
Abstract:
A method for determining an angle of arrival (AOA) of a received signal is disclosed, comprising: generating a baseband information signal by mixing a received signal with a local oscillator (LO) signal, the received signal being an in-phase signal and quadrature signal uncorrelated with each other and derived from different input data sets; obtaining baseband signal samples of the baseband information signal having an in-phase signal sample and a quadrature signal sample; determining a transmitter phase offset based on an estimated correlation between the in-phase signal samples and the quadrature signal samples; performing a plurality of phase measurements using a plurality of antennas to obtain a plurality of phase measurements; correcting the plurality of phase measurements based on the transmitter phase offset to produce a plurality of corrected phase measurement; and calculating an AOA of the received signal based on the difference between the plurality of corrected phase measurements.

High-Resolution High-Dynamic Range Doppler-Effect Measurement Using Modulated Carrier Signals

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US Patent:
20180206075, Jul 19, 2018
Filed:
Jan 17, 2018
Appl. No.:
15/873842
Inventors:
- Billerica MA, US
Joshua C. Park - Billerica MA, US
Glen Wolverton - Holden MA, US
Devang Topiwala - Nashua NH, US
International Classification:
H04W 4/02
G01S 13/58
Abstract:
Described in this document are ways to accomplish high resolution and high dynamic range Doppler-Effect measurements for use in wireless communications and other applications such as positioning. Doppler Effect (interchangeably called Doppler shift or Doppler frequency shift) measurements have traditionally been done with purpose-built devices, such as pulse-based radars. Presented in this document are alternative ways to incorporate Doppler frequency shift measurement using modulated carrier signals with a conventional radio, without additional hardware.

Angle Of Arrival Measurements Using Rf Carrier Synchronization And Phase Alignment Methods

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US Patent:
20170227623, Aug 10, 2017
Filed:
Apr 24, 2017
Appl. No.:
15/495972
Inventors:
- Billerica MA, US
Cuneyt Demirdag - Nashua NH, US
Glen Wolverton - Holden MA, US
Devang Topiwala - Nashua NH, US
Paul McFarthing - Boston MA, US
International Classification:
G01S 3/48
H04L 7/00
Abstract:
A method for determining an angle of arrival (AOA) of a received signal is disclosed, comprising: generating a baseband information signal by mixing a received signal with a local oscillator (LO) signal, the received signal being an in-phase signal and quadrature signal uncorrelated with each other and derived from different input data sets; obtaining baseband signal samples of the baseband information signal having an in-phase signal sample and a quadrature signal sample; determining a transmitter phase offset based on an estimated correlation between the in-phase signal samples and the quadrature signal samples; performing a plurality of phase measurements using a plurality of antennas to obtain a plurality of phase measurements; correcting the plurality of phase measurements based on the transmitter phase offset to produce a plurality of corrected phase measurement; and calculating an AOA of the received signal based on the difference between the plurality of corrected phase measurements.

High-Precision Blind Carrier Synchronization Methods For Lte Sc-Fdma Uplink

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US Patent:
20170111197, Apr 20, 2017
Filed:
Oct 17, 2016
Appl. No.:
15/295349
Inventors:
- Billerica MA, US
Joshua C. Park - Billerica MA, US
Jian Cui - Waltham MA, US
Cuneyt Demirdag - Nashua NH, US
Glen Wolverton - Holden MA, US
Devang Topiwala - Nashua NH, US
International Classification:
H04L 27/26
H04L 7/027
H04W 56/00
Abstract:
Methods and systems are described for frequency domain correction, time domain correction, and combinations thereof. Each Long Term Evolution (LTE) uplink residual frequency offset can be determined with less than 1 part per billion accuracy simultaneously and used for frequency offset correction. The disclosed method utilizes the same modulated signals for data and control as the 3GPP LTE wireless standard and can be embedded directly into the base station (downlink) PHY without additional hardware. The use of the disclosed methods provide multiple ways to simultaneously improve the uplink data throughput for every user in an LTE multiple access wireless system.
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Devang M Topiwala from Brookline, NH, age ~35 Get Report