公开(公告)号：NZ725174A

公开(公告)日：2019-11-29

申请号：NZ72517415

申请日：2015-05-04

Applicant: QUALCOMM INC

Inventor： VERMANI SAMEER ,  TIAN BIN ,  TANDRA RAHUL ,  DOAN DUNG

IPC: H04L25/02 ,  H04L5/00 ,  H04L27/26

Abstract: Methods, devices, and computer program products for improving training field design in packets with increased symbol durations are disclosed. In one aspect, a method of transmitting a packet on a wireless communication network is disclosed. The method includes transmitting a preamble of the packet over one or more space-time-streams, the preamble including one or more training fields configured to be used for channel estimation, the one or more training fields each comprising one or more symbols of a first symbol duration. The method further includes transmitting a payload of the packet over the one or more space-time-streams, the payload comprising one or more symbols of a second symbol duration, the second symbol duration greater than the first symbol duration, wherein the one or more symbols of the second symbol duration are each separated from each other by a cyclic prefix of a third duration, and wherein the first symbol duration is determined based at least in part on the third duration.

公开(公告)号：MY142577A

公开(公告)日：2010-12-15

申请号：MYPI20054794

申请日：2005-10-12

Applicant: QUALCOMM INC

Inventor： ANASTASIOS STAMOULIS ,  DOAN DUNG ,  DURGA MALLADI

IPC: H04L25/03

Abstract: 26 OATA DETECTION AND DFCODING "ITH CONSIDERATION'S F(R CHAMO',L ESTINIATION ERRORS DUE TO GUARD SUBBANDS ABSTFZACT 5 TECHNIQUCS FOR PERFORURIN.G DATA C1CIECIJON.9ND DECOD@NOQ IN A MANNER TO ACCOUNT FOR GUQTD SUBBANDS ARE, DESCRIBED. A RECEIVER OBTAINS RECEIVED PILOT SYMBOLS FOR PILOT SUBBANDS AND RECEIVED DATA SYMBOLS FOR DATA SUBBANCLS. CHANNEL ESTIMATES ARE DERIVED BASED ON THE RECEIVED PILOT SY'MBOLS WITH ZCIOCD-OUT PILOT SUBBANDS FILLED WITH ZEROS. DATA DETECTION IS PERFORMED ON THE RECEIVED CLAT A SYMBOLS WITH THE CHANNEL ESTIMATES TO 10 OBRAM DATA SYMBOL ESTIMATES. FSFIRN@IES OF NOISE AND ESTIMATION ERRORS DUE TO THE ZEROED-OAT PILOT SUBBANDS ARE DERIVED. LLRS ARE THEN COMPUTED BASED ON THE DATA SYMBOL ESTIMATZS, THE CHANNEL ESTIMATES, AND THE ESTIMATES OF THE TIOISC AND ESTIMATION ERROIS. THE LLIZS ARE DEINTERLEAVED AND DECODED TO OBTNM DECODED D;IIA.