公开(公告)号：EP1894334A2

公开(公告)日：2008-03-05

申请号：EP06784822.6

申请日：2006-06-13

申请人： Nokia Corporation

发明人： BOARIU, Adrian ,  VARSHNEY, Prabodh

IPC分类号： H04J3/22

CPC分类号： H04L5/0007 ,  H04L5/0021 ,  H04L5/0064 ,  H04W48/08 ,  H04W72/085 ,  H04W88/06 ,  H04W88/10

摘要： A method includes selecting one of a plurality of transmitter systems used to transmit data. Each transmitter system corresponds to one of a plurality of subbands. Each subband has a bandwidth and at least two of the subbands have different bandwidths. A physical layer technology is common to and used by each transmitter system to transmit on a respective subband. The selected transmitter system transmits the data. An apparatus includes a plurality of transmitter systems, each corresponding to one of a plurality of subbands. Each subband has a bandwidth and at least two of the subbands have different bandwidths. A physical layer technology is common to and used by each transmitter system to transmit on a respective subband. A controller is operable to select one of the transmitter systems to use to transmit data, and is operable to cause the selected transmitter system to transmit the data.

公开(公告)号：EP1599946A2

公开(公告)日：2005-11-30

申请号：EP04718161.5

申请日：2004-03-05

申请人： Nokia Corporation

发明人： PAPADIMITRIOU, Panayiotis ,  VARSHNEY, Prabodh ,  BORRAN, Mohammad, J.

IPC分类号： H04B1/00

CPC分类号： H04L25/03038 ,  H04B1/71055 ,  H04B1/71075 ,  H04B1/7115 ,  H04B7/0669 ,  H04B7/0891 ,  H04L1/0618

摘要： A hybrid receiver (606), and an associated method, for receiving a radio signal carrying transmitted data that is subject to distortion in the transmission channel. The receiver includes a plurality of stages that perform parallel interference cancellation (PIC) to establish successively more accurate estimates of the transmitted data, including a receiver first stage (611) being either a RAKE receiver or a linear minimum mean-square error (LMMSE) receiver, a second stage (620) including an LMMSE (626), and preferably a third stage (630) also including an LMMSE (636). Each stage processes the estimates of the transmitted signal provided by the stage preceding it to mitigate or eliminate as much transmission-channel interference as possible and prove a refined estimate for processing by subsequent stages. Improved channel estimation may be achieved by processing the pilot signal in similar fashion as well.

公开(公告)号：EP1854258A1

公开(公告)日：2007-11-14

申请号：EP06727261.7

申请日：2006-02-27

申请人： Nokia Corporation

发明人： ZHENG, Haihong ,  PURNADI, Rene ,  KAKANI, Naveen ,  BOARIU, Adrian ,  VARSHNEY, Prabodh

IPC分类号： H04L27/26

CPC分类号： H04L5/0058 ,  H04L5/0021 ,  H04L5/0046 ,  H04L5/006 ,  H04W48/18 ,  H04W76/10

摘要： An approach is provided for communicating in a multi-carrier system. A carrier selector selects one or more carriers among a plurality of carriers for transport of data over the multi-carrier system, wherein the data is transmitted using the selected carriers.

公开(公告)号：EP2774411A1

公开(公告)日：2014-09-10

申请号：EP11875022.3

申请日：2011-11-04

申请人： Nokia Corporation

发明人： KASSLIN, Mika ,  KAFLE, Padam Lal ,  VARSHNEY, Prabodh

IPC分类号： H04W36/00

CPC分类号： H04W36/36 ,  H04W16/14 ,  H04W48/18

摘要： This document discloses methods, apparatuses, and computer programs for selecting and providing a terminal apparatus of a wireless network with services. The terminal apparatus selects a wireless apparatus to provide the terminal apparatus with at least a first service. Then, it causes transmission of an association request to the wireless apparatus, wherein the association request comprises at least one information element indicating whether the request relates to provision of the first service without a second service or to provision of both the first service and a second service, wherein the second service is different from the first service and is subjected to the presence of the first service. Upon approval acquired from the wireless apparatus, the at least said first service is received from the wireless apparatus.

摘要翻译： 本文件公开了用于选择和提供具有服务的无线网络的终端装置的方法，装置和计算机程序。 终端装置选择无线装置，为终端装置提供至少第一服务。 然后，它引起关联请求向无线设备的传输，其中关联请求包括至少一个信息元素，其指示该请求是否涉及提供第一服务而不进行第二服务，或者提供第一服务和第二服务 服务，其中所述第二服务与所述第一服务不同，并且受到所述第一服务的存在。 在从无线装置获得批准的情况下，从无线装置接收至少所述第一服务。

公开(公告)号：EP1832076A1

公开(公告)日：2007-09-12

申请号：EP05826764.2

申请日：2005-12-02

申请人： Nokia Corporation

发明人： BOARIU, Adrian ,  VARSHNEY, Prabodh

IPC分类号： H04L27/26 ,  H04B7/06

CPC分类号： H04L27/2626 ,  H04B7/068 ,  H04L27/2608

摘要： A transmitter operates to increase a diversity order of a multi-carrier frequency division multiplex (MC-FDM) system. The transmitter has at least two transmit antennas and circuitry to provide at least two of the MC system frequency sub-carriers to different ones of the at least two transmit antennas.

公开(公告)号：EP1815631A1

公开(公告)日：2007-08-08

申请号：EP05804022.1

申请日：2005-11-22

申请人： Nokia Corporation

发明人： BORRAN, Mohammad Jaber ,  AAZHANG, Behnaam ,  VARSHNEY, Prabodh

IPC分类号： H04L1/18

CPC分类号： H04L1/1845 ,  H04L1/0026 ,  H04L1/1803 ,  H04L1/1893 ,  H04L27/2601

摘要： A first data symbol that includes a kth data bit is received over a multicarrier system. A first channel quality parameter is estimated for the first data symbol. A second data symbol that includes a retransmitted kth data bit is received. A second channel quality parameter for the second data symbol is estimated. A probable value of the kth data bit is determined based on both the first channel quality parameter and the second channel quality parameter. In response to an ARQ for data symbols communicated over a multicarrier system, the following are performed: determining channel quality parameters, each of the channel quality parameters corresponding to at least one of the transmitted data symbols; selecting a subset of the channel quality parameters exhibiting a worst quality; constructing a block of data symbols corresponding to the subset; and communicating the block of data symbols over a plurality of subcarriers.

公开(公告)号：EP1618681B1

公开(公告)日：2008-08-27

申请号：EP04760579.5

申请日：2004-04-26

申请人： Nokia Corporation

发明人： VARSHNEY, Prabodh ,  VILPPONEN, Hannu ,  BORRAN, Mohammad Jaber

IPC分类号： H04B7/26

CPC分类号： H04B7/2631

摘要： A system and method for the efficient transmission of information in a code division multiple access (CDMA) wireless telecommunication system. To increase the rate of reliable transmission, an orthogonal frequency-division multiplexing (OFDM) scheme is implemented in a direct-spread CDMA network, this combination sometimes being referred to as multi-carrier CDMA (MC-CDMA). Information (such as voice and data), interspersed with a known pilot signal, is encoded and spread across the frequency domain, rather than the time domain as in traditional CDMA; the allowable transmission bandwidth is divided into a number of carriers. To achieve even larger transmission rates, the guardband between carriers is eliminated. To prevent interference, the number of pilot transmissions is reduced and a corresponding number of frequency bins at the border of an OFDM block are loaded with zeros. The receiver simply ignores these subcarriers when reconstructing the transmitted signal.

公开(公告)号：EP1629620A2

公开(公告)日：2006-03-01

申请号：EP04733043.6

申请日：2004-05-14

申请人： Nokia Corporation

发明人： BORRAN, Mohammad, Jaber ,  SABHARWAL, Ashutosh ,  AAZHANG, Behnaam ,  VARSHNEY, Prabodh

IPC分类号： H04L1/02

CPC分类号： H04L25/0202 ,  H04L1/0612 ,  H04L27/3427

摘要： A signal constellation (50) for a multiple input/multiple output (MIMO communication system (20) when channel knowledge at the receiver is imperfect includes at least two (n-1)-dimensional sub-constellations of points that together form an n­dimensional constellation (50), the number n representing real dimensions and n=2M where M is the number of transmit antennas (26). The n-dimensional spherical constellation (50) may define a single sphere or a plurality of concentric subset spheres, and points between subsets are separated by a Kullback-Leibler distance rather than a Euclidian distance. Each sphere has sub-constellations that preferably are arranged in symmetric pairs that define equal numbers of points that lie in parallel planes, to allow recursive construction that minimizes computational complexity. An appropriate constellation may be chosen by ceasing a search once the optimum distance stops increasing as a number of the concentric levels increases.

公开(公告)号：EP1618681A2

公开(公告)日：2006-01-25

申请号：EP04760579.5

申请日：2004-04-26

申请人： Nokia Corporation

发明人： VARSHNEY, Prabodh ,  VILPPONEN, Hannu ,  BORRAN, Mohammad Jaber

IPC分类号： H04B7/216

CPC分类号： H04B7/2631

摘要： A system and method for the efficient transmission of information in a code division multiple access (CDMA) wireless telecommunication system. To increase the rate of reliable transmission, an orthogonal frequency-division multiplexing (OFDM) scheme is implemented in a direct-spread CDMA network, this combination sometimes being referred to as multi-carrier CDMA (MC-CDMA). Information (such as voice and data), interspersed with a known pilot signal, is encoded and spread across the frequency domain, rather than the time domain as in traditional CDMA; the allowable transmission bandwidth is divided into a number of carriers. To achieve even larger transmission rates, the guardband between carriers is eliminated. To prevent interference, the number of pilot transmissions is reduced and a corresponding number of frequency bins at the border of an OFDM block are loaded with zeros. The receiver simply ignores these subcarriers when reconstructing the transmitted signal.

公开(公告)号：EP1810408A2

公开(公告)日：2007-07-25

申请号：EP05808185.2

申请日：2005-10-19

申请人： Nokia Corporation

发明人： VARSHNEY, Prabodh ,  BORRAN, Mohammad, Jaber

IPC分类号： H03M13/29

CPC分类号： H03M13/2707 ,  H03M13/098 ,  H03M13/1102 ,  H03M13/1111 ,  H03M13/1148 ,  H03M13/1185 ,  H03M13/2903 ,  H03M13/2906 ,  H03M13/296 ,  H03M13/3905 ,  H03M13/6306 ,  H03M13/6362

摘要： A generalized zigzag code is described where the code segments (each including one parity bit and information bits) of a block are not necessarily of uniform length. For coding rates in which the average code segment length is not an integer, all code segment lengths may be identical. The number of code segments depends on the coding rate and number of information bits in a block. At the encoder, parity bits are added to each string of information bits in a block to yield the code segments. For a punctured code, concatenated or not, the encoder may remove or not generate the punctured parity bits. At a decoder that operates at a rate different from the code rate of a received block, null parity bits are inserted. The received block has a number of code segments. The decoder increases the number of code segments by the addition of null parity bits, thereby reducing the coding rate to the rate of the decoder. Methods and apparatuses are detailed.

摘要翻译： 描述了广义锯齿码，其中块的代码段（每个包括一个奇偶校验比特和信息比特）不一定是一致的长度。 对于平均代码段长度不是整数的编码率，所有代码段长度可能相同。 代码段的数量取决于块中的编码速率和信息比特数。 在编码器中，奇偶校验位被添加到块中的每个信息位串以产生代码段。 对于打孔代码，连接与否，编码器可以删除或不生成收缩奇偶校验位。 在以与接收块的码率不同的速率工作的解码器中，插入空奇偶校验位。 接收的块具有多个代码段。 解码器通过增加空奇偶校验位来增加代码段的数量，从而将编码速率降低到解码器的速率。 方法和装置是详细的。