EP 2756608 A2 20140723 - SYSTEMS AND METHODS TO EXPLOIT AREAS OF COHERENCE IN WIRELESS SYSTEMS
Title (en)
SYSTEMS AND METHODS TO EXPLOIT AREAS OF COHERENCE IN WIRELESS SYSTEMS
Title (de)
SYSTEME UND VERFAHREN ZUR NUTZUNG VON KOHÄRENZBEREICHEN IN DRAHTLOSEN SYSTEMEN
Title (fr)
SYSTÈMES ET PROCÉDÉS POUR EXPLOITER DES ZONES DE COHÉRENCE DANS DES SYSTÈMES DE COMMUNICATION SANS FIL
Publication
Application
Priority
- US 201113232996 A 20110914
- US 201113233006 A 20110914
- US 2012054937 W 20120912
Abstract (en)
[origin: WO2013040089A2] A multiple user (MU)-multiple antenna system (MAS) that exploits areas of coherence in wireless channels to create multiple non-interfering data streams to different users. In one embodiment, non-linear or linear precoding is used to create separate areas of coherence to different users. By way of example, the non-linear precoding may comprise dirty-paper coding (DPC) or Tomlinson-Harashima precoding and the linear precoding may comprise block diagnolization (BD) or zero-forcing beamforming (ZF-BF). Limited feedback techniques may also be employed to send channel state information (CSI) from the plurality of users to the MU-MAS. In some embodiments, a codebook is built based on basis functions that span the radiated field of a transmit array. Additionally, the precoding may be continuously updated to create non-interfering areas of coherence to the users as the wireless channel changes due to Doppler effect. Moreover, the size of the areas of coherence may be dynamically adjusted depending on the distribution of users.
IPC 8 full level
H04B 7/04 (2006.01); H04B 7/02 (2006.01); H04L 25/03 (2006.01); H04W 24/02 (2009.01)
CPC (source: EP KR RU US)
H04B 7/024 (2013.01 - EP KR); H04B 7/04 (2013.01 - RU); H04B 7/0452 (2013.01 - EP KR US); H04L 25/03343 (2013.01 - EP KR); H04L 25/4975 (2013.01 - EP KR); H04W 72/121 (2013.01 - RU); H04L 27/2602 (2013.01 - EP KR RU US); H04L 27/26035 (2021.01 - EP KR RU US); H04L 27/34 (2013.01 - EP)
Citation (search report)
See references of WO 2013040089A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013040089 A2 20130321; WO 2013040089 A3 20130530; AU 2012308632 A1 20140327; AU 2012308632 A2 20140731; AU 2012308632 B2 20170928; AU 2017272246 A1 20180104; AU 2017272246 B2 20190418; AU 2019204969 A1 20190801; AU 2019204969 B2 20200702; BR 112014005163 A2 20170411; CA 2848355 A1 20130321; CA 2848355 C 20200922; CN 103797725 A 20140514; CN 103797725 B 20180706; CN 108832971 A 20181116; EP 2756608 A2 20140723; EP 3419188 A1 20181226; IL 231311 A0 20140430; IL 231311 B 20181031; JP 2014531813 A 20141127; JP 2017163570 A 20170914; JP 2019080343 A 20190523; JP 6466501 B2 20190206; KR 102062650 B1 20200106; KR 102065018 B1 20200110; KR 102171272 B1 20201029; KR 20140093928 A 20140729; KR 20180135091 A 20181219; KR 20200005754 A 20200116; MX 2014002900 A 20140430; NZ 738000 A 20190628; NZ 754048 A 20191025; NZ 757995 A 20200626; RU 2014114486 A 20151020; RU 2017127936 A 20190201; RU 2017127936 A3 20210115; RU 2628223 C2 20170815; SG 10201601953S A 20160428; SG 11201400621T A 20140428; TW 201328264 A 20130701; TW 201717591 A 20170516; TW 201921899 A 20190601; TW I575914 B 20170321; TW I651956 B 20190221; TW I699984 B 20200721
DOCDB simple family (application)
US 2012054937 W 20120912; AU 2012308632 A 20120912; AU 2017272246 A 20171207; AU 2019204969 A 20190711; BR 112014005163 A 20120912; CA 2848355 A 20120912; CN 201280044869 A 20120912; CN 201810567635 A 20120912; EP 12762167 A 20120912; EP 18186156 A 20120912; IL 23131114 A 20140304; JP 2014530763 A 20120912; JP 2017082862 A 20170419; JP 2019001944 A 20190109; KR 20147009876 A 20120912; KR 20187035654 A 20120912; KR 20207000338 A 20120912; MX 2014002900 A 20120912; NZ 73800012 A 20120912; NZ 75404812 A 20120912; NZ 75799512 A 20120912; RU 2014114486 A 20120912; RU 2017127936 A 20120912; SG 10201601953S A 20120912; SG 11201400621T A 20120912; TW 101133865 A 20120914; TW 105139589 A 20120914; TW 108102072 A 20120914