公开(公告)号：EP3685614B1

公开(公告)日：2023-11-01

申请号：EP18765929.7

申请日：2018-09-17

发明人： PIECHOTTA, Tom ,  MAHLER, Kim

IPC分类号： H04L5/00 ,  H04L27/30 ,  H04W28/02 ,  H04L27/26

公开(公告)号：EP2260605B1

公开(公告)日：2017-04-19

申请号：EP09723841.4

申请日：2009-03-27

申请人： QUALCOMM Incorporated

发明人： BHATTAD, Kapil ,  PALANKI, Ravi ,  LIN, Dexu

IPC分类号： H04L5/00 ,  H04L25/49 ,  H04L27/10 ,  H04L27/30 ,  H04L1/00 ,  H04L27/26

CPC分类号： H04L27/10 ,  H04L1/0057 ,  H04L5/0053 ,  H04L5/0091 ,  H04L25/4902 ,  H04L27/2647 ,  H04L27/30

公开(公告)号：EP3058689A1

公开(公告)日：2016-08-24

申请号：EP14854494.3

申请日：2014-10-17

申请人： The Georgia Tech Research Corporation

发明人： ZHOU, Qi ,  MA, Xiaoli

IPC分类号： H04L27/26 ,  H04L27/30 ,  H04L27/32

CPC分类号： H04B7/0413 ,  H04L25/03242 ,  H04L25/03891 ,  H04L27/38

摘要： Systems and methods are disclosed for detecting a symbol in large-scale multiple-input multiple- output communication systems. The detection is based on an improved lattice-reduction-aided K-best algorithm. The detection finds K best candidate symbols with minimum costs for each layer based on a priority queue and an on-demand expansion. In a complex domain, the detection may include a 2-dimensional Schnorr-Euchner expansion or, in the alternative, a two- stage 1 -dimensional Schnorr-Euchner expansion.

摘要翻译： 系统和方法是游离缺失盘用于检测大型多输入多输出通信系统的符号。 检测在改进的晶格规约辅助K-最佳算法是基于。 检测找到具有用于基于优先级队列和点播膨胀每一层的最小成本ķ最佳候选符号。 在一个复杂的结构域，所述检测可包括二维的Schnorr-EUCHNER膨胀或在替代方案中，两阶段的一维的Schnorr-EUCHNER扩张。

公开(公告)号：EP2274862A2

公开(公告)日：2011-01-19

申请号：EP09726286.9

申请日：2009-03-27

申请人： QUALCOMM Incorporated

发明人： PALANKI, Ravi ,  GOROKHOV, Alexei, Y.

IPC分类号： H04L5/00 ,  H04W52/24 ,  H04L27/10 ,  H04L27/30 ,  H04L27/26 ,  H04W52/32 ,  H04W52/28

CPC分类号： H04W72/082 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0091 ,  H04L27/10 ,  H04L27/2647 ,  H04L27/30 ,  H04W52/243 ,  H04W52/245 ,  H04W52/281 ,  H04W52/32 ,  H04W72/0426

摘要： Techniques for sending signaling messages in a wireless communication network are described. In an aspect, a signaling message (e.g., a reduce interference request) may be sent by mapping it to at least one specific subcarrier among a set of subcarriers reserved for sending the signaling message. The at least one subcarrier may be selected based on the message value. A signal may be sent on the at least one subcarrier in multiple symbol periods to convey the signaling message. In another aspect, a reduce interference request may be sent based on an orthogonal resource among orthogonal resources available for sending reduce interference requests. In one design, an orthogonal sequence may be selected based on the request and may be spread across a resource segment. In another design, the reduce interference request may be processed to obtain modulation symbols, and each modulation symbol may be spread across multiple subcarriers in one symbol period.

公开(公告)号：EP1563621B1

公开(公告)日：2009-07-22

申请号：EP03768691.2

申请日：2003-11-05

申请人： Broadcom Corporation

发明人： KONG, Ning ,  RIPHAGEN, Ian ,  LOTTER, Michiel

IPC分类号： H04B15/00 ,  H04K1/00 ,  H04L27/30 ,  H04B1/707

CPC分类号： H04B1/712 ,  H04B1/7117

摘要： A method and apparatus (400) for recovering information from a spread spectrum information signal included within a composite signal (404) from a signal propagation medium are disclosed herein. The method includes correlating time-offset versions of the composite signal with a spreading sequence in order to produce a plurality of correlation signals. The method further includes generating weighting factors based upon multipath channel gain characteristics so as to maximize a signal to interference plus noise ratio (SINR) of an estimate of the information. A plurality of weighted symbol streams are generated by processing the plurality of correlation signals in accordance with the weighting factors. The estimate of the information is then produced by combining the plurality of weighted symbol streams.

公开(公告)号：EP1187576B1

公开(公告)日：2009-03-25

申请号：EP00932563.0

申请日：2000-05-18

申请人： SiRF Technology, Inc.

发明人： EDISON, Donald, Brian

IPC分类号： H04B1/707 ,  H04L27/30

CPC分类号： H04W48/20 ,  H04B2201/70701 ,  H04B2201/70702

摘要： A mobile wireless transceiver (12) selects one of multiple nearby base stations (14A-14D) to facilitate communication over a wireless network. Each base station transmits a pilot signal that includes a spreading signal transmitted at one of many possible phase offsets. The wireless transceiver (12) selects an initial one of possible phase offsets of the spreading signal (36) and then correlates a received signal against the spreading signal at consecutive ones of the possible phase offsets (32). Correlation begins at the selected initial phase offset and continues until a component of the received signal and the spreading signal (34) are aligned, indicating the detection of the pilot signal from one of the base stations. The transceiver (12) then selects a non-consecutive one of the possible phase offsets of the spreading signal (34) and correlates (32) the received signal against the spreading signal at this non-consecutive phase offset (36) to determine whether any other component of the received signal is aligned with the spreading signal (34) at the selected non-consecutive phase offset.

公开(公告)号：EP0857379B1

公开(公告)日：2008-07-30

申请号：EP96933069.5

申请日：1996-09-20

申请人： MOTOROLA, INC.

发明人： SOUISSI, Slim ,  GEHMAN, John, B.

IPC分类号： H04B15/00 ,  H04K1/00 ,  H04L27/30 ,  H04J11/00 ,  H04B1/707

CPC分类号： H04B1/7102

摘要： Interference removal in spread spectrum signals, comprises the steps at a spread spectrum transmitter (10) of spreading information across a predetermined spectrum by phase modulating a repeating noise sequence (18), providing a spread spectrum signal and transmitting the spread spectrum signal. The method further comprises the steps at a receiver of receiving the spread spectrum signal along with interference (41) multiplying (42) the spread spectrum signal along with interference by a window function (44) providing a multiplied spread spectrum signal. The information is recovered by despreading the multiplied (48) spread spectrum signal using a reciprocal (50) of the spectrum of the repeating noise sequence to obtain a data spectrum with interference and subsequently normalize (52) to obtain a clean data spectrum. Alternatively the information can be recovered by substituting a corrupted magnitude spectrum with a prestored PN sequence magnitude spectrum (70) as shown by receiver (60).

公开(公告)号：EP1935160A1

公开(公告)日：2008-06-25

申请号：EP06778355.5

申请日：2006-08-24

申请人： Nokia Siemens Networks GmbH & Co. KG

发明人： MICHEL, Jürgen ,  DÖTTLING, Martin ,  GERLACH, Heino ,  HALFMANN, Rüdiger ,  HINDELANG, Thomas ,  KLEIN, Axel ,  KRAUSE, Jörn ,  LOBINGER, Andreas ,  RAAF, Bernhard ,  VIERING, Ingo ,  ZIRWAS, Wolfgang

IPC分类号： H04L27/30

CPC分类号： H04B7/2621 ,  H04L27/30

摘要： The invention relates to a method for transmitting information (ORG) to a radiocommunication system receiver (MS), wherein a frequency band splitted into several sub-carriers is used for communications. The transmitter (BS) transmits a signal to at least two sub-carriers, respectively, wherein the information (ORG) is encoded in such a way that it is transmissible to an addressee by knowledge of the frequency location of two or more sub-carriers associated with the knowledge of a phase difference between two or more signals. The transmitter (BS) and the receiver (MS) for carrying out the inventive method are also disclosed.

公开(公告)号：EP1368916A4

公开(公告)日：2008-05-07

申请号：EP02721357

申请日：2002-03-12

申请人： SKYWORKS SOLUTIONS INC

发明人： KENT MARK

IPC分类号： H04B1/40 ,  H04B1/707 ,  H04L5/16 ,  H04L7/00 ,  H04L27/00 ,  H04B15/00 ,  H04B1/38 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04B1/7115 ,  H04B2201/70707 ,  H04L25/14

摘要： A method to recover spread spectrum radio signals is disclosed (fig. 4). The method includes recovering clock information from a plurality of signals from at least one basestation (200). Aligning the plurality of signals using the recovered clock signals (202). Combining at least two of the aligned signals (206). Recovering information from the combined signals (208).

公开(公告)号：EP1746796B1

公开(公告)日：2008-02-13

申请号：EP06022962.2

申请日：1993-03-04

申请人： Qualcomm, Incorporated

发明人： Tiedemann, Edwart G., Jr. ,  Weaver, Lindsay A., Jr. ,  Padovani, Roberto

IPC分类号： H04L27/30 ,  H04J13/00 ,  H04B7/26 ,  H04L12/28 ,  H04L1/16

CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. The transmitters may be mobile stations and the receiver may be a base station in a CDMA cellular telephone system. Each mobile station uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time- delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. A hash function produces the number from an identification number uniquely associated with that mobile station. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence. The noise level is reduced by minimizing transmission power. The mobile station increments the power of successive probes within each probe sequence. The first probe of each probe sequence is transmitted at a predetermined level.