Cimarron A Mittelsteadt

US Patent:

7987410, Jul 26, 2011

Filed:

Feb 25, 2010

Appl. No.:

12/712435

Inventors:

David Hedberg - Menlo Park CA, US
Cimarron Mittelsteadt - Saugus CA, US
Wen Yen Weng - Los Angeles CA, US

Assignee:

Xocyst Transfer AG L.L.C. - Wilmington DE

International Classification:

H03M 13/00

US Classification:

714779, 714774

Abstract:

Disclosed herein are various embodiments of methods, systems, and apparatus for encoding OFDM packets in a digital communication system. In one exemplary method embodiment, LDPC codewords in an IEEE 802. 11 wireless transmission are shortened, decreasing the iterations necessary to insure accurate communications. The codewords are shortened by adding known bits in predetermined locations in the last data symbol of a packet.

US Patent:

8351368, Jan 8, 2013

Filed:

Oct 3, 2008

Appl. No.:

12/245498

Inventors:

Rahul Malik - Bangalore, IN
Vipin Aggarwal - Irvine CA, US
Albert Garrett - Gadsden AL, US
Etan Cohen - San Francisco CA, US
Cimarron Mittelsteadt - Saugus CA, US

Assignee:

Entropic Communications, Inc. - San Diego CA

International Classification:

H04B 7/185
H04B 7/204
H04J 1/00

US Classification:

370318, 370319, 370480

Abstract:

A technique for communicating multimedia data between nodes over coaxial cable, wherein the nodes are connected via a coaxial cable network, is disclosed. In an embodiment, the technique involves establishing a primary channel for communicating between first and second nodes of the coaxial cable network, establishing a secondary channel for communicating between the first and second nodes of the coaxial cable network, wherein the primary and secondary channels are in different frequency bands and wherein the primary channel is used for communicating media access control frames, and communicating a time series of data frames between the first and second nodes using both the primary channel and the secondary channel.

US Patent:

20070038916, Feb 15, 2007

Filed:

Jun 6, 2006

Appl. No.:

11/448603

Inventors:

Cimarron Mittelsteadt - Saugus CA, US
Wen-Yen Weng - Los Angeles CA, US

International Classification:

H03M 13/00

US Classification:

714758000

Abstract:

A method of coding data for transmission in a communication medium or channel. A codeword is generated from a mother code parity check matrix and a macro matrix. The mother code parity check matrix includes sub-matrices that are m-by-m square matrices with cyclic structure, and the macro matrix includes elements that represent nonzero sub-matrices of the mother code parity check matrix.

US Patent:

20130128822, May 23, 2013

Filed:

Nov 18, 2011

Appl. No.:

13/299757

Inventors:

Cimarron Mittelsteadt - Santa Clarita CA, US

International Classification:

H04W 72/04

US Classification:

370329

Abstract:

A carrier tracking technique includes allocating a first number of bits per symbol to a carrier tracking subcarrier of a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on a first target performance margin. The technique includes allocating numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin.

US Patent:

20130128995, May 23, 2013

Filed:

Nov 18, 2011

Appl. No.:

13/299751

Inventors:

Cimarron Mittelsteadt - Santa Clarita CA, US

International Classification:

H04L 25/08
H04L 27/28

US Classification:

375260, 375346

Abstract:

A method includes generating representative noise variance estimates based on a plurality of received symbols received in an orthogonal frequency division multiplexing (OFDM) signal. The representative noise variance estimates correspond to respective frequency intervals of a plurality of frequency intervals of the OFDM channel. Individual frequency intervals of the plurality of frequency intervals include a plurality of contiguous frequency bins of the OFDM signal.

US Patent:

20130148765, Jun 13, 2013

Filed:

Dec 13, 2011

Appl. No.:

13/324217

Inventors:

Amit Ranjan Dubey - Los Angeles CA, US
Cimarron Mittelsteadt - Santa Clarita CA, US

International Classification:

H04L 27/06

US Classification:

375343

Abstract:

A coarse timing acquisition technique includes generating a sequence detection indicator. The sequence detection indicator indicates detection of a sequence of repeated symbols in a received signal. The sequence detection indicator is based on a first energy threshold and a normalized moving sum of an autocorrelation signal. The autocorrelation signal is based on the received signal.

US Patent:

20130148767, Jun 13, 2013

Filed:

Dec 13, 2011

Appl. No.:

13/324225

Inventors:

Amit Ranjan Dubey - Los Angeles CA, US
Cimarron Mittelsteadt - Santa Clarita CA, US

International Classification:

H04B 1/10

US Classification:

375346

Abstract:

A method of operating a communications system includes generating a channel impulse response estimate based on a first received signal. The method includes selecting a precursor and a cyclic prefix length for a second received signal based on the channel impulse response estimate, a target cyclic prefix energy level, and a predetermined range of cyclic prefix lengths.

US Patent:

20130177088, Jul 11, 2013

Filed:

Jan 9, 2012

Appl. No.:

13/346060

Inventors:

Cimarron Mittelsteadt - Santa Clarita CA, US

International Classification:

H04L 27/00

US Classification:

375259

Abstract:

A technique detects the presence of a packet identification sequence in a received sequence of samples received over a communications network. The packet identification sequence, when present and properly detected in a received packet, is used to determine a particular type of the received packet from a plurality of packet types that may be received over the communications network. The technique for detecting the packet identification sequence includes detecting a null sequence in the received packet and a predetermined identification sequence in the packet. Detection of the predetermined sequence uses energy estimates for corresponding windows of received samples.