公开(公告)号：US11438872B2

公开(公告)日：2022-09-06

申请号：US16071840

申请日：2016-09-29

Applicant: Intel Corporation

Inventor： Utsaw Kumar ,  Debdeep Chatterjee ,  Seunghee Han ,  Ralf Matthias Bendlin

IPC: H04W72/00 ,  H04W76/10 ,  H04L5/00

Abstract: Devices and methods of enhancing narrowband communications are generally described. NPSS and NSSS are modulated to include an additional bit that indicates a duplexing scheme, a raster frequency offset (zero or non-zero), an operating mode (in-band or standalone/guard-band) or frame timing used by the eNB. The NPSS modulation uses conjugate ZC sequences multiplied by a cover code for each OFDM symbol. The NMIB may provide additional information related to the operating mode or offset. NSSS cyclic shifts may be used to indicate the offset or TDD/FDD use, as may relative locations of the NPSS and NSSS. The NSSS may use symbol-level modulation and time domain cyclic shifts to indicate the frame timing.