US 11,917,529 B2
Systems and methods for identifying false alarms from ghost cells arriving from LTE-SSS detection with half-frame combining
Michal Palgy, Rosh Haayin (IL); Raphael Veyre, Paris (FR); and Roy Ron, Tel Aviv (IL)
Assigned to SEQUANS COMMUNICATIONS SA, Colombes (FR)
Filed by Sequans Communications SA, Colombes (FR)
Filed on Sep. 10, 2021, as Appl. No. 17/472,092.
Application 17/472,092 is a continuation of application No. PCT/CN2018/111511, filed on Oct. 23, 2018.
Prior Publication US 2023/0109423 A1, Apr. 6, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 48/16 (2009.01); H04W 56/00 (2009.01)
CPC H04W 48/16 (2013.01) [H04W 56/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for cell detection in a mobile communications network, the method comprising:
performing a detection procedure in the mobile communications network, the detection procedure including correlating two M-sequences to generate two correlations, and combining the two correlations, each correlation expressed as a likelihood of a cyclic shift, combining the two correlations to form a likelihood of a SSS sequence; and
performing a signature-based filtering to eliminate a cell detection false alarm peak, the signature-based filtering including comparing a known signature of a specific secondary synchronization signal (SSS) sequence going through the detection procedure.