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公开(公告)号：US12231272B2
公开(公告)日：2025-02-18
申请号：US18323807
申请日：2023-05-25
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Piyush Gupta , Zhifei Fan
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may receive, from a second network entity, an indication of a first frequency offset associated with the second network entity. In some aspects, the first network entity may receive, from the second network entity, a first transmission including a first communication and a first helper signal that are separated in a frequency domain based on the first frequency offset. In some aspects, the first network entity may decode, via envelope tracking, the first transmission to obtain the first communication from the first transmission. Numerous other aspects are provided.
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公开(公告)号：US20240396580A1
公开(公告)日：2024-11-28
申请号：US18324393
申请日：2023-05-26
Applicant: QUALCOMM Incorporated
Inventor： Morteza Soltani , Jing Sun , Xiaoxia Zhang , Iyab Issam Sakhnini , Raviteja Patchava
Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may determine a power amplifier operating mode associated with non-linear distortion of an input waveform for a power amplifier, where the power amplifier operating mode may be from a set of two or more power amplifier operating modes each associated with respective amounts of the non-linear distortion. The transmitting device may transmit a set of reference signals associated with estimation of a wireless channel for a transmission, and the transmitting device may further transmit an additional set of reference signals associated with non-linear distortion mitigation for the transmission. In some examples, a resource density of the additional set of reference signals may be based on the power amplifier operating mode. In some examples, the transmitting device may transmit an indication of the power amplifier operating mode, the resource density, or both, to a receiving device.
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公开(公告)号：US12063137B2
公开(公告)日：2024-08-13
申请号：US17643540
申请日：2021-12-09
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Jun Ma , Morteza Soltani
CPC classification number: H04L27/2697 , H04L5/0007 , H04L27/2636
Abstract: Certain aspects of the present disclosure provide techniques for hybrid modulation and demodulation, which may include multiplexing and demultiplexing different waveform types. An example method includes receiving a time-domain waveform from a transmitting entity and converting the time-domain waveform to a frequency domain. The method also includes identifying a first set of time and frequency resources associated with converted first information and a second set of time and frequency resources associated with second information in time and frequency resources of an orthogonal frequency domain multiplexing (OFDM) resource grid in a time-frequency domain. The method further includes decoding the first set of time and frequency resources to generate first information from the converted first information. For certain aspects, the first information may be precoded with an orthogonal time frequency space (OTFS) modulation.
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公开(公告)号：US11996969B2
公开(公告)日：2024-05-28
申请号：US17819464
申请日：2022-08-12
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Xiaoxia Zhang , Junyi Li
CPC classification number: H04L27/2666 , H04L27/2607 , H04W72/04
Abstract: Certain aspects of the present disclosure provide techniques for using a guard interval in a delay-Doppler domain. A method of wireless communication includes converting information in a delay-Doppler domain to a time-frequency domain, wherein the information includes data and at least one guard interval (GI); mapping the converted information to time and frequency resources of an orthogonal frequency domain multiplexing (OFDM) resource grid in the time-frequency domain; generating a time-domain waveform based on the OFDM resource grid, wherein the time-domain waveform includes one or more GIs; and outputting the time-domain waveform for transmission to a node.
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5.发明公开公开(公告)号：US20230403107A1
公开(公告)日：2023-12-14
申请号：US17835687
申请日：2022-06-08
Applicant: QUALCOMM Incorporated
Inventor： Morteza Soltani , Jun Ma , Xiaoxia Zhang , Raviteja Patchava
CPC classification number: H04L5/001 , H04L5/0057 , H04B7/0626 , H04W72/042 , H04W72/087
Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device, such as a network entity, may transmit an indication (e.g., via control signaling) to a receiving device, such as a user equipment (UE), indicating that a secure downlink message is scheduled for transmission to the UE. The UE may transmit a sounding reference signal (SRS) to the network entity in response to the control signaling, and the network entity may determine a channel estimate and construct interference based on the channel estimate. The network entity may encode the secure downlink message according to an orthogonal time frequency space (OTFS) precoding scheme and may add the interference to the encoded secure downlink message over a slot duration. The network entity may transmit the encoded secure downlink message, including the added interference, to the UE. The UE may decode the encoded secure downlink message based on the OTFS precoding scheme.
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Patent Agency Ranking
公开(公告)号：US11832354B2
公开(公告)日：2023-11-28
申请号：US17446594
申请日：2021-08-31
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Jun Ma , Morteza Soltani , Raviteja Patchava , Iyab Issam Sakhnini , Tao Luo
CPC classification number: H04W88/14 , H04L5/0051 , H04L27/2607 , H04L27/2636
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an integrated access and backhaul (IAB) node may receive, from a first wireless device, an uplink communication using a first guard interval. The IAB may receive, from a second wireless device, a downlink communication using a second guard interval, a second length of the second guard interval being different from a first length of the first guard interval. The IAB may process the uplink communication and the downlink communication in a same fast Fourier transform window. Numerous other aspects are described.
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7.发明授权公开(公告)号：US11632272B1
公开(公告)日：2023-04-18
申请号：US17706026
申请日：2022-03-28
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Jun Ma , Morteza Soltani , Jing Sun , Xiaoxia Zhang , Zhifei Fan , Ahmed Abdelaziz Ibrahim Abdelaziz Zewail
Abstract: Methods, systems, and devices for wireless communications are described. A network entity may map a demodulation reference signal (DMRS), a truncated sequence, and data in a delay-Doppler domain in accordance with a control signal. The network entity may apply a Fourier transform on the mapped DMRS, the truncated sequence, and the data to generate a signal in the time domain. The network entity may output, and a user equipment (UE) may receive, the signal in the time domain, including the DMRS, the truncated sequence, and the data. The UE may apply a Fourier transform on the received signal in the time domain to generate a mapping of the DMRS and the data in the delay-Doppler domain. The UE may perform channel estimation based on applying the Fourier transform on the received signal.
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公开(公告)号：US11546947B1
公开(公告)日：2023-01-03
申请号：US17443400
申请日：2021-07-26
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Jun Ma , Morteza Soltani , Jing Sun , Raviteja Patchava
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive, using a first beam, a first physical random access channel (PRACH) communication during a first random access channel (RACH) occasion. The base station may receive, during the first RACH occasion, a data communication having a timing that is aligned with a timing of the PRACH communication to provide a beam switching gap before reception of a second PRACH communication during a second RACH occasion. Numerous other aspects are described.
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公开(公告)号：US12155593B2
公开(公告)日：2024-11-26
申请号：US17528100
申请日：2021-11-16
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Jun Ma , Morteza Soltani , Xiaoxia Zhang
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for demodulation reference signal (DMRS) precoding in high-Doppler scenarios. In some aspects, communicating devices may support different precodings for different portions of a signal, such as for a DMRS portion and an information portion. For example, a device may receive a signal including an orthogonal time-frequency space (OTFS) precoded first waveform portion carrying DMRS symbols and an orthogonal frequency division multiplexing (OFDM) precoded second waveform portion carrying information symbols. The device may transform the OTFS precoded DMRS symbols from a time-frequency domain to a delay-Doppler domain, may use the DMRS symbols to estimate a delay-Doppler channel, and may use the delay-Doppler channel estimate to measure an inter-carrier interference (ICI). The receiving device may use the ICI measurement to receive the information symbols carried by the OFDM precoded second waveform portion.
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公开(公告)号：US20240031084A1
公开(公告)日：2024-01-25
申请号：US17814114
申请日：2022-07-21
Applicant: QUALCOMM Incorporated
Inventor： Raviteja Patchava , Xiaoxia Zhang , Junyi Li , Zhifei Fan , Jing Sun , Tao Luo , Morteza Soltani
CPC classification number: H04L5/0007 , H04L5/0053 , H04L27/01
Abstract: Certain aspects of the present disclosure provide techniques for delay-Doppler processing in orthogonal frequency domain multiplexing (OFDM). A method of wireless communication includes obtaining an indication of a first resource allocation associated with a first signal; obtaining the first signal in an OFDM resource grid based at least in part on the first resource allocation; and processing the first signal in a delay-Doppler domain.
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