Michael E Mccloud

US Patent:

8155254, Apr 10, 2012

Filed:

Dec 18, 2008

Appl. No.:

12/337632

Inventors:

Junqiang Li - Sunnyvale CA, US
Je Woo Kim - Cupertino CA, US
Matthias Brehler - Boulder CO, US
Michael McCloud - San Diego CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H03D 1/04

US Classification:

375346, 375260

Abstract:

Techniques for the adjustment of a position of Fast Fourier Transform (FFT) window are provided. The adjustment may be based on the condition that the length of channel impulse response is larger than the length of cyclic prefix. The technique may determine a position of the FFT window that attempts to maximize carrier-to-noise (C/N) ratio value measured at the receiver.

US Patent:

8284875, Oct 9, 2012

Filed:

Jan 15, 2010

Appl. No.:

12/688760

Inventors:

Jong Hyeon Park - San Jose CA, US
Michael L. McCloud - San Diego CA, US
Brian C. Banister - San Diego CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04L 27/06

US Classification:

375341, 375260, 375267, 375340, 375344, 375345, 375347, 455 75, 455101, 455119, 455132, 4551731, 4551821, 4551822, 4551921, 4551922, 4552321, 4552341, 455296, 455500, 4555621, 370334, 341173, 714794, 714795, 714796

Abstract:

Certain embodiments of the present disclosure provide a method for frequency-domain gain control in system utilizing orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO). The proposed method reduces the complexity of the system while maximizing the internal accuracy of the OFDM MIMO decoder and preserving the performance of the system.

US Patent:

20120045024, Feb 23, 2012

Filed:

Feb 23, 2011

Appl. No.:

13/033545

Inventors:

Tao Cui - London, GB
Jia Tang - San Jose CA, US
Andrew Sendonaris - Los Gatos CA, US
Atul A. Salvekar - Emeryville CA, US
Subramanya P.N. Rao - Sunnyvale CA, US
Lei Xiao - Mountain View CA, US
Michael L. McCloud - San Diego CA, US
Brian Clarke Banister - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04L 27/06

US Classification:

375341

Abstract:

Methods and apparatus for receiving, processing, and decoding MIMO transmissions in communications systems are described. A non-Gaussian approximation method for simplifying processing complexity where summations are used is described. Use of a priori information to facilitate determination of log likelihood ratios (LLRs) in receivers using iterative decoders is further described. A Gaussian or non-Gaussian approximation method using a priori information may be used to determine a K-best list of values for summation to generate an LLR is also described.

US Patent:

20180176040, Jun 21, 2018

Filed:

Dec 14, 2017

Appl. No.:

15/841527

Inventors:

- San Diego CA, US
Pengkai ZHAO - San Jose CA, US
Supratik BHATTACHARJEE - San Diego CA, US
Amir FARAJIDANA - Sunnyvale CA, US
Wenshu ZHANG - San Diego CA, US
Michael Lee MCCLOUD - San Diego CA, US

International Classification:

H04L 25/02

Abstract:

Certain aspects of the present disclosure relate to techniques for estimating a channel using soft-windowing. A user equipment (UE) may determine, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, determine a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, and estimate the channel by applying the weights to the samples.

US Patent:

20180062709, Mar 1, 2018

Filed:

Aug 23, 2017

Appl. No.:

15/684685

Inventors:

- San Diego CA, US
Prashant Udupa SRIPATHI - San Jose CA, US
Supratik BHATTACHARJEE - San Diego CA, US
Michael MCCLOUD - San Diego CA, US

International Classification:

H04B 7/0413
H04B 7/08
H04B 17/29

Abstract:

In order to balance the power requirements of a MIMO receiver with the gains that may be achieved through its use, an apparatus determines whether a current configuration of the UE supports iterative MIMO reception. When it is determined that the current configuration of the UE supports iterative MIMO reception, the apparatus determines whether at least one parameter of the received signal is within a corresponding target condition, respectively, for each of the at least one parameters, e.g., including determining whether a scheduling percentage meets a scheduling threshold and whether an error rate is within an error rate range. When both the configuration supports iterative MIMO reception and the signal parameter(s) meet the corresponding target condition(s), the apparatus uses the iterative MIMO receiver. If not, the apparatus uses a serial receiver.