Qualcomm Incorporated

Other

Bin Tian

Sameer Vermani

Lin Yang

Jialing Li Chen

Youhan Kim

Alfred Asterjadhi

Simone Merlin

George Cherian

Stephen Jay Shellhammer

Rahul Tandra

Lochan Verma

Gwendolyn Denise Barriac

Yan Zhou

Hemanth Sampath

Didier Johannes Richard Van Nee

Abhishek Pramod Patil

Arjun Bharadwaj

Vincent Knowles Jones, Iv

Yanjun Sun

Ahmad Jalali

Alireza Raissinia

Santosh Paul Abraham

Xiaoxia Zhang

Jing X Sun

Maarten Menzo Wentink

Thomas J Richardson

Ning Zhang

Louay A Jalloul

Tao Luo

Aleksandar Damnjanovic

Yongbin Wei

Tamer Adel Kadous

Arumugam Chendamarai Kannan

Solomon B Trainin

Assaf Yaakov Kasher

June Namgoong

Xiaoxin Zhang

Rahul Malik

James Simon Cho

Mark Leo Moeglein

Junyi Li

Taesang Yoo

Linhai He

Peerapol Tinnakornsrisuphap

Sai Yiu Duncan Ho

Zhifei Fan

Lawrence W Yonge, Iii

Srinivas Katar

Alecsander Petru Eitan

Louis A Campbell

Dung Ngoc Doan

Kanke Wu

Tao Tian

Qifan Chen

Eugene Jong-Hyon Baik

Albert Van Zelst

Alok Kumar Gupta

Judd Erlenbach

Amin Jafarian

Tevfik Yucek

Raja Banerjea

Eric Pierre Rebeiz

Gang Ding

Le Nguyen Luong

Koorosh Akhavan

Pooria Pakrooh

Ahmad Abdulrahman Mohammed

Franklin J Gutterman

Srikant Jayaraman

Geert Arnout Awater

Chi-Lin Su

Vishvabhusan Pati

Manish Madan

John Greszczuk

Guido Robert Frederiks

Olaf Josef Hirsch

Leonard N Schiff

Ranganathan Krishnan

Ralph Schneider

John F Migliazza

Jeffrey S Dove

Gregory A Wright

Qi Xue

William G Ames

Tao-Fei Samuel Ng

Hao Zhu

Michael Richard Green

Chao Zou

Ivan Jankovic

Darrell L Krulce

Cheng-Ming Chen

James M Young

Scott Howard King

Nitin Ravinder

Pei Chen

Jeffrey S Cohen

Ishaque Ashar Kadampot

Carolyn Sue Martinez

Steven M Claessens

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a responding device may receive a signal from an initiating device. The responding device may estimate, from the signal, a channel impulse response (CIR) that represents signal reflections from one or more objects as multiple taps. The responding device may select one or more taps, from the multiple taps, that are within a first time window that starts at a first offset from a reference point and that has a first specified time duration. The responding device may transmit, to the initiating device, a CIR report that indicates the one or more taps. Numerous other aspects are described.

Radio frequency sensing with channel impulse response

Aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device (WCD) may transmit, to a second wireless communication device, a first synchronization message using a first radio frequency (RF) technology and a first frequency resource, the first synchronization message associated with synchronization for a second RF technology. The first WCD may transmit, to the second WCD and after switching to a second frequency resource, a second synchronization message using the first RF technology, the second synchronization message associated with synchronization for the second RF technology, and the switching to the second frequency resource based at least in part on one or more of: transmission of the second synchronization message being associated with ranging or sensing, or failure of the first synchronization message or failure of a reply, from the second WCD, to the first synchronization message. Various other aspects are described.

Narrowband assisted ultrawideband frequency hopping

This disclosure provides methods, devices and systems for reducing PAPR in wireless communications. Some implementations more specifically relate to single-carrier frequency-division multiplexing (SC-FDM) techniques that can be used for wireless communications in wireless local area networks (WLANs). In some aspects, a wireless communication device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) as a series of symbols in the time domain and may transform a subset of the time-domain symbols into a number (Q) of frequency-domain samples based on a Q-point discrete Fourier transform (DFT). The wireless communication device maps the Q frequency-domain samples to a number (N) of orthogonal subcarriers (representing an orthogonal frequency-division multiplexing (OFDM) symbol), where N>Q, and transforms the N subcarriers into N time-domain samples, based on an inverse fast Fourier transform (IFFT), for transmission over a wireless channel.

Single-carrier frequency-division multiplexing (SC-FDM) for wireless local area networks (WLANs)

This disclosure provides methods, devices and systems for generating enhanced trigger frames. Some implementations more specifically relate to trigger frame designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced trigger frame may be used to solicit a non-legacy trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs). In some implementations, the enhanced trigger frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, an enhanced trigger frame may be configured in accordance with a legacy trigger frame format or a non-legacy trigger frame format. Thus, when configured in accordance with the legacy trigger frame format, the enhanced trigger frame can also be used to a legacy TB PPDU from one or more STAs.

Enhanced trigger frame

This disclosure provides methods, devices and systems for amplitude shaping encoding, and specifically, for indicating boundaries in bitstreams encoded using amplitude shaping encoding. In some aspects, a transmitting device may insert, into an bitstream to indicate a boundary, a sequence of amplitude bits not associated with any patterns of bit values in a lookup table used for the encoding. In some other aspects, a transmitting device may monitor a length of the amplitude bits in a bitstream during the encoding and stop the encoding on information bits at an end of a current data unit responsive to the length reaching a threshold. In some other aspects, a transmitting device may monitor the length of the information bits and, for each data unit, determine whether a boundary is or would be reached. Responsive to determining that a boundary is or would be reached, the transmitting device may not include, before the boundary, any amplitude bits generated based on the information bits in the data unit, and instead add padding bits after a last amplitude bit before the boundary.

Boundary identification for probabilistic amplitude shaping

This disclosure provides methods, devices, and systems for forward error correction encoding and modulation with reliability differentiation. In some examples, a transmitting wireless communication device may use a concatenated encoding technique to generate a set of encoded bits that conveys both information bits of a first priority and information bits of a second priority lower than the first priority. In other examples, the transmitting device may use a parallel encoding technique to generate a first set of encoded bits that conveys information bits of the first priority and a second set of encoded bits that conveys information bits of the second priority. According to aspects of the disclosure, the transmitting device can map encoded bits corresponding to information bits of the first priority to relatively higher reliability bit positions of a modulation constellation.

Forward error correction encoding with reliability differentiation

This disclosure provides methods, components, devices and systems for physical layer (PHY) latency reduction. Some aspects more specifically relate to PHY protocol data unit (PPDU) designs that support inserting low-latency traffic into a transmission opportunity (TXOP) occupied by non-low-latency traffic. In some implementations, during a TXOP, an access point (AP) may output an aggregated PPDU (A-PPDU) that is aggregated in a time domain and includes an A-PPDU header and one or more A-PPDU subframes. The AP may obtain, from an application layer, a low-latency PPDU (LL-PPDU) subframe and may insert the LL-PPDU subframe in place of at least one of the one or more A-PPDU subframes. The AP may output the LL-PPDU subframe during the TXOP. A wireless station (STA) receiving the A-PPDU header and the one or more A-PPDU subframes may detect the presence of the LL-PPDU subframe and may receive and decode the LL-PPDU subframe.

Physical layer latency reduction

This disclosure provides methods, components, devices and systems for modulation of extended long range (ELR) wireless packets. A wireless communication device receives an indication to transmit a single-user wireless packet associated with an ELR communication mode. The indication may be of a resource allocation, associated with the ELR communication mode, via which to transmit the packet. The packet may include a preamble portion and a data portion, with at least the data portion associated with a duplication scheme pertaining to the ELR communication mode. The wireless communication device transmits the packet in accordance with the indication. The wireless communication device may transmit the packet using a first quantity of duplications of at least the data portion in accordance with the duplication scheme, with the first quantity of duplications associated with the ELR communication mode.

Modulation of extended long range wireless packets

This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to packet designs that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may map a physical layer convergence protocol (PLCP) protocol data unit (PPDU) to orthogonal subcarriers according to existing tone plans associated with carrier frequencies below 7 GHz and may up-clock the PPDU for transmission on carrier frequencies above 7 GHz (such as by increasing the frequency of a clock signal used to convert the PPDU between the frequency domain and the time domain). In some implementations, the PPDU may conform to an existing PPDU format designed for sub-7 GHz wireless communications. In some other implementations, the PPDU may conform to a 'green field' PPDU format optimized for wireless communications on carrier frequencies above 7 GHz.

60 GHz physical layer convergence protocol (PLCP) protocol data unit (PPDU) formats

This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.

Distributed transmission of short training fields

This disclosure provides methods, devices and systems that support communicating using orthogonal frequency division multiple access (OFDMA) according to a tone plan that supports 20 MHz subchannel puncturing within a wireless channel. In some aspects, a non-legacy tone plan may define a set of tones for a resource unit (RU) such that the RU does not overlap a 20 MHz subchannel boundary of the wireless channel. The locations of the set of tones in the non-legacy tone plan may be shifted relative to corresponding tones associated with a corresponding RU according to a legacy tone plan. One or more of the disclosed tone plans may enable puncturing of subchannels while making use of some RUs that would otherwise partially overlap a punctured subchannel in the legacy tone plan.

Tone plan for wireless communication

This disclosure provides methods, devices and systems for wireless communications over a 320 MHz bandwidth. Some implementations more specifically relate to signaling techniques for indicating the bandwidth of a physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmitted in a secondary 160 MHz channel of the 320 MHz bandwidth. In some implementations, an access point (AP) may transmit an aggregated PPDU (A-PPDU) that includes a first sub-PPDU transmitted within a primary 160 MHz channel and a second sub-PPDU transmitted within a secondary 160 MHz channel. In such implementations, the first sub-PPDU may carry bandwidth information indicating the bandwidth of the first sub-PPDU within the primary 160 MHz channel and the second sub-PPDU may carry bandwidth information indicating the 320 MHz bandwidth.

Bandwidth indications for a secondary 160 MHZ channel

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.

Long training field (LTF) in distributed transmission

This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for techniques for reducing feedback information in an extremely high throughput (EHT) wireless local area network (WLAN). A receiving device (beamformee), such as a station (STA), may receive a sounding signal from a transmitting device (beamformer), such as an access point (AP), and transmit channel feedback. The receiving device may transmit the channel feedback as part of a reduced compressed beamforming feedback (CBF) operation that includes determining a first set of channel characteristics. The receiving device may select a subset of the first set of channel characteristics and determine a set of differential characteristics based on the subset. The transmitting device may then transmit the sets of characteristics as reduced CBF to the transmitting device. The transmitting device may determine a channel estimation for beamformed signaling based on the reduced CBF.

Techniques for reducing feedback information

A method, an apparatus, and a computer program product for wireless communication are provided. In one aspect, an apparatus is configured to transmit user data in a first symbol of a first symbol type. The first symbol type has a first symbol duration, a first frequency bandwidth, and a first tone plan. The first tone plan includes a first valid start tone index, a first valid end tone index, and a first set of DC tones. The apparatus is further configured to transmit an LTF in a second symbol of a second symbol type. The second symbol type has a second symbol duration, a second frequency bandwidth, and a second tone plan. The second tone plan includes a second valid start tone index, a second valid end tone index, and a second set of DC tones.

Tone plan for LTF compression

Growing community of inventors

San Diego, CA, United States of America

Bin Tian