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.