Shuling Feng

US Patent:

7486751, Feb 3, 2009

Filed:

Jan 31, 2005

Appl. No.:

11/048075

Inventors:

Shuling Feng - San Jose CA, US
Chien-Cheng Tung - Fremont CA, US

Assignee:

Ralink Technology, Inc. - Cupertino CA

International Classification:

H04B 7/10

US Classification:

375347, 375260, 375323

Abstract:

A multi input multi output (MIMO) receiver for receiving signals having a synchronization (SYNC) module being responsive to a plurality of received baseband signals for processing the same to generate maximum ratio combining (MRC) parameters, complementary code keying (CCK) modulated signals and orthogonal frequency division multiplexing (OFDM) modulated signals, said SYNC module for using said MRC parameters to process said OFDM modulated signals to generate a plurality of aligned OFDM signals in time domain, said MIMO receiver for processing said plurality of aligned OFDM signals to generate a plurality of subcarriers, in accordance with an embodiment of the present invention. The MIMO receiver further including a time domain CCK MRC module being responsive to said MRC parameters for processing said CCK modulated signals in time domain to generate aligned signals, said aligned signals being combined to generate an adjusted signal for demodulation. The MIMO receiver further including a frequency domain OFDM MRC module being responsive to said plurality of said subcarriers for combining the same in the frequency domain to generate an equalized response for demodulation, wherein said MIMO receiver for processing said CCK modulated signals in the time domain and said OFDM modulated signals in the frequency domain to improve the reception of said plurality of received baseband signals.

US Patent:

7995665, Aug 9, 2011

Filed:

Mar 31, 2010

Appl. No.:

12/752000

Inventors:

Shuling Feng - San Jose CA, US

Assignee:

Ralink Technology (Singapore) Corporation Pte. Ltd. - Singapore

International Classification:

H04K 1/10

US Classification:

375260, 375267, 375299, 375316, 375340, 375346, 375347, 375348, 455101, 455132, 455296, 455500, 4555621, 370210, 370335, 370342, 370480

Abstract:

An embodiment of the present invention includes a transceiver for use in a multi-input-multi-output (MIMO) Orthogonal Frequency Domain Multiplexing (OFDM) wireless communication system. The transceiver decodes and remodulates certain signal fields and uses the same to update the coefficients of a frequency equalizer thereby improving channel estimation and extending training.

US Patent:

7995672, Aug 9, 2011

Filed:

Dec 7, 2009

Appl. No.:

12/632707

Inventors:

Shuling Feng - San Jose CA, US

Assignee:

Ralink Technology (Singapore) Corporation PTE. Ltd. - Singapore

International Classification:

H04B 7/02

US Classification:

375267, 375260, 375299, 375340, 375347, 455101, 455132, 455296, 455500, 370203, 370204, 370206, 370208, 370210

Abstract:

An embodiment of the present invention includes a transceiver for use in a multi-input-multi-output (MIMO) Orthogonal Frequency Domain Multiplexing (OFDM) wireless communication system. The transceiver decodes and remodulates certain signal fields and uses the same to update the coefficients of a frequency equalizer thereby improving channel estimation and extending training.

US Patent:

20100054368, Mar 4, 2010

Filed:

Aug 26, 2008

Appl. No.:

12/198766

Inventors:

Shuling (Julia) Feng - San Jose CA, US

Assignee:

RALINK TECHNOLOGY CORPORATION - Cupertino CA

International Classification:

H03D 1/00

US Classification:

375340

Abstract:

A method and system for detecting packets of different formats in a receiver is disclosed. The method and system include initializing the receiver to be in a legacy mode; and receiving at least one data symbol by the receiver. The method and system include detecting if there is a high throughput (HT) signal field within a data packet and determining the format of the data packet based upon the detection of a HT signal field.

US Patent:

7313750, Dec 25, 2007

Filed:

Aug 5, 2004

Appl. No.:

10/912996

Inventors:

Shuling Feng - San Jose CA, US
Chien-Cheng Tung - Fremont CA, US

Assignee:

Ralink Technology, Inc. - Cupertino CA

International Classification:

H03M 13/03
H03D 1/00

US Classification:

714796, 375341, 714786, 714795

Abstract:

A receiver system that receives signals and has a demapper device that is responsive to an equalizer output and generates a demapper output including one or more bit metrics. The receiver system also generates equalizer output, and the demapper uses distance measure to calculate bit metrics. The receiver system uses demapper output to generate a processed output. The receiver system further includes a convolutional decoder which is responsive to the processed output, and subsequently generates a decoded bit sequence, as well as uses the processed output to generate one or more path metrics. The convolutional decoder uses bit metrics and path metrics to the decode processed output, to generate a decoded bit sequence. The receiver system uses the distance measure to reduce the size of the bit metrics and the size of the path metrics to improve the performance of said convolutional decoder.

US Patent:

20210120427, Apr 22, 2021

Filed:

Oct 8, 2020

Appl. No.:

17/066103

Inventors:

- Singapore, SG
Chung-Ta Ku - San Jose CA, US
Gabor Bajko - San Jose CA, US
Gary A. Anwyl - San Jose CA, US
Shuling Feng - San Jose CA, US
Jianhan Liu - San Jose CA, US
Yongho Seok - San Jose CA, US
Po-Yuen Cheng - San Jose CA, US
James Chih-Shi Yee - San Jose CA, US

International Classification:

H04W 16/02
H04W 48/20
H04W 52/04
H04W 24/08

Abstract:

An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.

US Patent:

20210099248, Apr 1, 2021

Filed:

Sep 16, 2020

Appl. No.:

17/022934

Inventors:

- Singapore, SG
Jianhan Liu - San Jose CA, US
Shuling Feng - San Jose CA, US

International Classification:

H04L 1/00

Abstract:

A method of joint encoding schemes with interleaver and tone mapper for multiple-resource unit (multi-RU) operation involves performing joint encoding of a plurality of information bits to generate a plurality of encoded bit sequences. The method also involves processing the plurality of encoded bit sequences by interleaving and tone mapping the encoded bit sequences with respect to a plurality of resource units (RUs) on either or both of an aggregate-RU basis and an individual-RU basis to generate a plurality of processed bit sequences. The method further involves transmitting the plurality of processed bit sequences over the plurality of RUs.

US Patent:

20170099089, Apr 6, 2017

Filed:

Sep 30, 2016

Appl. No.:

15/283168

Inventors:

- Hsinchu, TW
Shuling Feng - Saratoga CA, US
YungPing Hsu - Taipei City, TW

International Classification:

H04B 7/02
H04L 27/26
H04L 25/02

Abstract:

A method of transmitting and receiving a HE PPDU and perform channel estimation enhancement is proposed. The HE PPDU comprises legacy preamble, HE-STF, HE-LTF, and data. A beam-change indication indicates if the pre-multiplied beamforming Q-matrix is changed from legacy preamble to H-SFT, HE-LTF, and data portion. A value of 1 indicates that Q matrix is changed. A value of 0 indicates that Q matrix is unchanged and receiver should be safe to combine L-LTF and HE-LTF. The beam-change indication can be used to significantly enhance channel estimation at receiver. When there is no beam-change, receiver does not change operation during HE-STF and HE-LTF such that the channel estimations can rely on the combination of L-LTFs, L-SIG, RL-SIG, HE-SIGAs and HE-LTF.