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公开(公告)号：US11646854B2
公开(公告)日：2023-05-09
申请号：US17245471
申请日：2021-04-30
Applicant: QUALCOMM Incorporated
IPC: H04W56/00 , H04L5/00 , H04W72/0446 , H04W80/02
CPC classification number: H04L5/0094 , H04L5/0039 , H04W72/0446 , H04W80/02
Abstract: 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 trigger frame and physical layer convergence protocol (PLCP) protocol data unit (PPDU) designs that support distributed transmission. In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) PPDU from a wireless station (STA), where the trigger frame carries RU allocation information indicating a number (N) of tones allocated for the STA and carries tone distribution information indicating whether the N tones are allocated for a contiguous transmission or a distributed transmission. In some other implementations, an AP or a STA may transmit a PPDU carrying distributed signaling information indicating whether the PPDU is transmitted as a contiguous transmission or a distributed transmission.
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公开(公告)号：US11533694B2
公开(公告)日：2022-12-20
申请号：US16659253
申请日：2019-10-21
Applicant: QUALCOMM Incorporated
Inventor： Sameer Vermani , Bin Tian , Lin Yang , Jialing Li Chen
Abstract: This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.
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公开(公告)号：US11438880B2
公开(公告)日：2022-09-06
申请号：US17099343
申请日：2020-11-16
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Dung Ngoc Doan
Abstract: 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.
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公开(公告)号：US11374699B2
公开(公告)日：2022-06-28
申请号：US16945605
申请日：2020-07-31
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Alfred Asterjadhi
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may transmit a first HARQ frame to a second WLAN device. The first HARQ frame may include initial transmissions of a first plurality of forward error correction (FEC) codewords. The HARQ protocol may support new techniques for feedback, such as a feedback capability in which a bitmap may be used to indicate decoding failures of codewords. The first feedback message may include indicators to change a HARQ configuration parameter based on channel conditions. In some implementations, the second HARQ frame may combine retransmissions regarding the failed codewords with initial transmissions of a second plurality of codewords.
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公开(公告)号：US11303303B2
公开(公告)日：2022-04-12
申请号：US17130162
申请日：2020-12-22
Applicant: QUALCOMM Incorporated
Inventor： Thomas Joseph Richardson , Dung Ngoc Doan , Didier Johannes Richard Van Nee , Lin Yang , Bin Tian
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for encoding data for wireless transmissions. In one aspect, a wireless device may encode a number (M) of systematic bits for transmission to a receiving device. The systematic bits may be encoded using a low-density parity-check (LDPC) code to produce an LDPC codeword. The LDPC codeword may include a number (N) of codeword bits, including the M systematic bits and one or more parity bits. The wireless device may further puncture a number (K) of the codeword bits to produce a punctured codeword having a code rate M/(N−K)>5/6. The wireless device may transmit the N−K remaining codeword bits, over a wireless channel, to a receiving device.
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Patent Agency Ranking
公开(公告)号：US11228396B2
公开(公告)日：2022-01-18
申请号：US17140626
申请日：2021-01-04
Applicant: QUALCOMM Incorporated
Inventor： Dung Ngoc Doan , Lin Yang , Didier Johannes Richard Van Nee , Bin Tian , Thomas Joseph Richardson , Stephen Jay Shellhammer
Abstract: This disclosure provides methods, devices and systems for encoding data in wireless communications. Some implementations more specifically relate to performing a first encoding operation on data bits of a code block to shape the amplitudes of the resultant symbols such that the amplitudes have a non-uniform distribution. In some aspects, the probabilities associated with the respective amplitudes generally increase with decreasing amplitude. For example, the non-uniform distribution of the amplitudes of the symbols may be approximately Gaussian. In some aspects, the first encoding operation is or includes a prefix encoding operation having an effective coding rate greater than 0.94 but less than 1. The first encoding operation is followed by a second encoding operation that also adds redundancy but does not alter the data bits themselves. In some aspects, the second encoding operation is or includes a low-density parity-check (LDPC) encoding operation associated with a coding rate greater than 5/6.
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公开(公告)号：US11190385B2
公开(公告)日：2021-11-30
申请号：US17102422
申请日：2020-11-23
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Jialing Li Chen , Bin Tian
Abstract: This disclosure provides methods, devices, and systems for a wireless communication device to perform signal phase rotation. In some implementations, the wireless communication device may determine a number of phase rotation parameters to be applied to a number of tones of a transmission signal. In some aspects, each of the phase rotation parameters indicates a phase rotation to be applied to each of the tones according to a carrier index range for each of the tones and a bandwidth mode for the transmission signal. In some implementations, the wireless communication device may apply the phase rotation parameters to respective ones of the tones according to the specified phase rotations and the carrier index ranges, and transmit the transmission signal from the wireless communication device according to the applied phase rotation parameters.
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公开(公告)号：US11165541B2
公开(公告)日：2021-11-02
申请号：US16672162
申请日：2019-11-01
Applicant: QUALCOMM Incorporated
Inventor： Simone Merlin , Didier Johannes Richard Van Nee , Hemanth Sampath , Bin Tian , Gwendolyn Denise Barriac
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a retransmission protocol in a wireless local area network (WLAN). The retransmission protocol enables a sending station (STA) to communicate additional parity bits associated with an original transmission that included forward error correction (FEC) encoded codewords. Several techniques are described for a receiving STA to indicate which portions of the original transmission was not properly received. The receiving STA may store the original transmission for use with additional parity bits in a subsequent transmission. The sending STA may communicate the additional parity bits in a subsequent transmission to assist the receiving STA recover the data from the original transmission.
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公开(公告)号：US20210297209A1
公开(公告)日：2021-09-23
申请号：US17209132
申请日：2021-03-22
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian , Sameer Vermani , Jialing Li Chen
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for generating or receiving a wireless packet that includes a first preamble based on a first generation of a wireless communication protocol and a second preamble based on a second generation of the wireless communication protocol. The wireless packet may include the first preamble in a first subchannel of a wireless channel and the second preamble in a second subchannel of the wireless channel. Thus, the wireless packet may concurrently include communication to or from different types of wireless stations that support the different generations of a wireless communication protocol.
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公开(公告)号：US11121806B2
公开(公告)日：2021-09-14
申请号：US16562907
申请日：2019-09-06
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Lin Yang , Sameer Vermani , Lochan Verma , Stephen Jay Shellhammer
IPC: H04L5/00 , H04L1/00 , H04B7/0417 , H04L1/18 , H04L27/26
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for low density parity check (LDPC)-based incremental redundancy (IR) hybrid automatic repeat request (HARQ) transmission processing. In one aspect, an apparatus for wireless communications is configured to generate a first packet using a LDPC encoding process. The apparatus is further configured to generate coded bits using a second LDPC encoding process if the first packet is not successfully decoded by a wireless device, generate a second packet including at least some of the coded bits generated using the second LDPC encoding process, and output the second packet for transmission.
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