公开(公告)号：US11736227B1

公开(公告)日：2023-08-22

申请号：US17475132

申请日：2021-09-14

Applicant: Amazon Technologies, Inc.

Inventor： Songping Wu ,  Tianxiang Zhou ,  Qian Liu ,  Ming-Wei Liu

IPC: H04W4/06 ,  H04L1/00 ,  H04W84/12

CPC classification number: H04L1/0033 ,  H04W84/12

Abstract: Technologies directed to hash spreading to extend a wireless coverage are described. One method includes receiving input bits and control information that specifies a first data rate and a second modem scheme having a second signal range that is greater than a first signal range corresponding to a first modem scheme. The method generates a first sequence of bits by scrambling the input bits, the first sequence of bits having a first number of bits. The method generates a second sequence of bits by hash spreading the first sequence of bits using a set of spreading codes. The second sequence of bits has a second number of bits greater than the first number of bits. The method generates first symbols by modulating the second sequence, converts the first symbols into radio frequency (RF) signals, and sends the RF signals to the second wireless device.

公开(公告)号：US11706716B1

公开(公告)日：2023-07-18

申请号：US17373467

申请日：2021-07-12

Applicant: Amazon Technologies, Inc.

Inventor： Songping Wu ,  Sai Prashanth Chinnapalli

IPC: H04W52/24 ,  H04W52/02 ,  H04W88/06 ,  H04B17/318 ,  H04B1/40 ,  H04W52/20 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04W52/0245 ,  H04B1/40 ,  H04B17/318 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/20 ,  H04W52/241 ,  H04W52/245 ,  H04W88/06

Abstract: Technologies directed to improving power for wireless transceivers are described. One method determines, in a first mode, a first value associated with a wireless link and a second values associated with the wireless link, the first value being indicative of a first metric and the second value being indicative of a second metric different from the first metric. The first value and the second value collectively indicate a category of channel quality for the wireless link. The method determines that the wireless device can operate in a second mode for subsequent data based on the category of channel quality, wherein in the second mode the wireless device consumes less power than in the first power mode. The method receives, in the second mode, second data over the wireless link.

公开(公告)号：US11082270B1

公开(公告)日：2021-08-03

申请号：US16745010

申请日：2020-01-16

Applicant: Amazon Technologies, Inc.

Inventor： Songping Wu ,  Sai Prashanth Chinnapalli

IPC: H04L27/22 ,  H04B1/30

Abstract: Technologies directed to improving signal quality in received wireless signals in the phase domain of shift keying demodulation are described. One method receives digital data, the digital data including a systematic error as a linear function of residual carrier frequency offset and phase noise (PN). The method extracts first phase data from the digital data, determines, in a phase domain, an estimate of the systematic error using historical phase error data of additional digital data received prior to the digital data, and generate second phase data by subtracting the estimate from the first phase data. The method determines a set of symbols from the second phase data and generates a bit sequence of a data packet from the set of symbols.

公开(公告)号：US11284360B1

公开(公告)日：2022-03-22

申请号：US16745001

申请日：2020-01-16

Applicant: Amazon Technologies, Inc.

Inventor： Songping Wu ,  Sai Prashanth Chinnapalli

IPC: H04W52/52 ,  H04W88/06 ,  H04L27/20 ,  H04W52/02 ,  H04B1/40

Abstract: Technologies directed to improving power for wireless transceivers are described. One method processes, in a first power mode, a first portion of a data packet, the first portion being modulated with a FSK modulation. The method determines a first gain value for an amplifier and determines that the first data packet has a second portion that is modulated with a PSK modulation. The method determines a receive signal strength indicator (RSSI) value associated with the first portion and determines that the RSSI does not exceed a threshold value corresponding to a throughput requirement. The method switches to a second power mode, the second power mode being higher in power than the first power mode. The method determines, in the second power mode, a second gain value for the amplifier and process the second portion of the first data packet. The second gain value is determined before the processing the second portion.

公开(公告)号：US11071064B1

公开(公告)日：2021-07-20

申请号：US16745021

申请日：2020-01-16

Applicant: Amazon Technologies, Inc.

Inventor： Songping Wu ,  Sai Prashanth Chinnapalli

IPC: H04W88/06 ,  H04W52/02 ,  H04B17/318 ,  H04B1/40 ,  H04W52/20 ,  H04L1/00 ,  H04W52/24 ,  H04L1/20

Abstract: Technologies directed to improving power for wireless transceivers are described. One method receives, in a low power mode, a data packet over a wireless link and determines a RSSI value and a receive signal quality indicator (RSQI) value. The method stores a record with the RSSI and RSQI values in memory. The method determines an average RSSI value and an average RSQI value from historical RSSI and RSQI values, respectively, stored in records. The method categorizes received data in a first channel quality indicator (CQI) category using the average RSSI value and the average RSQI value and configures the wireless device to operate in another power mode, responsive to the data being in the first CQI. The method processes a subsequent data packet while in the other power mode. In some cases, the other power mode is less than a maximum power mode specified by a wireless standard.