公开(公告)号：US20170180171A1

公开(公告)日：2017-06-22

申请号：US14974958

申请日：2015-12-18

Applicant: QUALCOMM Incorporated

Inventor： Seyed Mohammad Ehsan HOSSEINI ,  RaviKiran GOPALAN ,  Yu-Han YANG ,  Markos TROULIS

IPC: H04L27/14 ,  H04L1/00

CPC classification number: H04L27/14 ,  H03M13/23 ,  H03M13/256 ,  H03M13/41 ,  H03M13/6325 ,  H04L1/0054 ,  H04L1/006 ,  H04L2027/004 ,  H04L2027/0065 ,  H04L2027/0093

Abstract: Systems and methods pertain to a receiver configured to receive and detect convolutionally coded Gaussian frequency-shift keying (GFSK) signals comprising a trellis of branches. The receiver implements a Per-Survivor Processing (PSP) algorithm to generate frequency estimate, phase estimate, and branch metric increment for each branch of a trellis. A Viterbi Algorithm is applied to the trellis for Maximum Likelihood Sequence Estimation (MLSE) of information bits. The receiver includes a PSP block comprising a number of blocks equal to the number of branches of the trellis. Each block includes a Phase Corrector, Decision Feedback Demodulator (DFD), and a Frequency Tracking Loop (FTL) to update the PSP variables.

公开(公告)号：US20210306909A1

公开(公告)日：2021-09-30

申请号：US16832425

申请日：2020-03-27

Applicant: QUALCOMM Incorporated

Inventor： Seyed Mohammad Ehsan HOSSEINI ,  Le Nguyen LUONG ,  Eunmo KANG ,  Dongsik KIM

IPC: H04W28/06 ,  H04W8/00 ,  H04W84/18 ,  H04W48/16 ,  H04W4/80 ,  H04W52/02

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, related to low power techniques for a BLE device during a scanning state. The BLE device is configured to scan for a preamble of a packet while in a first power mode and detect when a bit of the preamble is received. Upon detecting that the bit of the preamble is received, the BLE device switches from the first power mode to a second power having a higher operating power for the BLE device than the first power mode. The switch in power modes occurs while the preamble is being received or immediately after the preamble is received and before an access address of the packet is received. The BLE device, while in the second power mode, then scans for the access address of the packet.