公开(公告)号：US20110218768A1

公开(公告)日：2011-09-08

申请号：US12818813

申请日：2010-06-18

申请人： Yan Xin ,  Honghai Zhang ,  Sampath Rangarajan ,  Kyungtae Kim

发明人： Yan Xin ,  Honghai Zhang ,  Sampath Rangarajan ,  Kyungtae Kim

IPC分类号： G06F17/18

CPC分类号： G06F17/18

摘要： A method and system for determining whether a given electromagnetic frequency is in use includes applying a transformation to an amplitude of received samples, adjusting the transformed samples by a constant based on a minimum detection signal-to-noise ratio; combining the adjusted samples to produce a test statistic; and using a processor to make a determination regarding if the frequency is in use based on the test statistic exceeded or falling below a threshold, said test statistic being based on Ξq=Σi=1q×L(|ri|2−Δ), where q is the block index, ri is the ith received sample, and Δ is the constant.

摘要翻译： 一种用于确定给定电磁频率是否在使用中的方法和系统包括将变换应用于接收样本的振幅，基于最小检测信噪比将变换的样本调整一个常数; 结合调整后的样本产生检验统计量; 并且使用处理器基于超过或低于阈值的测试统计量来确定是否使用频率，所述测试统计量基于＆Xgr; i = 1q×L（| ri | 2- ＆Dgr;），其中q是块索引，ri是第i个收集的样本，＆Dgr; 是常数。

公开(公告)号：US07933352B2

公开(公告)日：2011-04-26

申请号：US12045400

申请日：2008-03-10

申请人： Jongsoo Choi ,  Yan Xin

发明人： Jongsoo Choi ,  Yan Xin

IPC分类号： H04L5/12 ,  H04L27/36

CPC分类号： H04L27/366 ,  H04L1/0086

摘要： A method for determining a bit pattern of a symbol in a wireless communication system using a cross modulation scheme. The method includes generating symbols with the cross modulation scheme, classifying positions of coding symbols by reliabilities of at least 3 classes according to an average bit error rate BER(ave) of symbols generated with the cross modulation scheme and a bit error rate BER based on transmission positions of the coding symbols in a modulation symbol during transmission of a packet with the cross modulation scheme, and determining a bit pattern such that higher-priority symbols are inserted into higher-reliability positions.

摘要翻译： 一种使用交叉调制方案确定无线通信系统中的符号的位模式的方法。 该方法包括使用交叉调制方案生成符号，根据使用交叉调制方案生成的符号的平均误码率BER（ave）和基于以下的比特误码率BER对至少3个等级的可靠性对可能性进行编码符号的位置分类： 在具有交叉调制方案的分组传输期间，调制符号中的编码符号的发送位置，以及确定将更高优先级符号插入更高可靠性位置的位模式。

公开(公告)号：US07430243B2

公开(公告)日：2008-09-30

申请号：US10828104

申请日：2004-04-20

申请人： Georgios B. Giannakis ,  Zhiqiang Liu ,  Yan Xin

发明人： Georgios B. Giannakis ,  Zhiqiang Liu ,  Yan Xin

IPC分类号： H04L1/02

CPC分类号： H04L1/0618 ,  H04L27/2608

摘要： Techniques are described for space-time-frequency (STF) coding of multi-carrier transmissions over frequency-selective fading channels. In particular, techniques for STF coding of MIMO-OFDM systems are described that provide maximum diversity, high coding gains, and low decoding complexity are described. A set of generally correlated OFDM subcarriers are divided into groups of subcarriers creating a set of group STF (GSTF) subsystems, within which STF coding is applied to each GSTF subsystem. Subcarrier grouping preserves maximum diversity gains and simplifies both the code construction within each GSTF and decoding complexity. ST coding techniques are used in designing STF block (STFB) and STF trellis (STFT) codes which are applied within GSTF subsystems.

摘要翻译： 描述了通过频率选择性衰落信道进行多载波传输的空时频率（STF）编码的技术。 具体地，描述了提供最大分集，高编码增益和低解码复杂度的MIMO-OFDM系统的STF编码技术。 一组通常相关的OFDM子载波被划分成一组子载波，创建一组组STF（GSTF）子系统，在其中将STF编码应用于每个GSTF子系统。 子载波分组保留最大分集增益，并简化了每个GSTF内的代码构造和解码复杂度。 ST编码技术用于设计在GSTF子系统中应用的STF块（STFB）和STF格（STFT）码。

公开(公告)号：US20080049859A1

公开(公告)日：2008-02-28

申请号：US11843100

申请日：2007-08-22

申请人： Jong-Soo Choi ,  Yan Xin ,  Ju-Ho Lee ,  Joon-Young Cho

发明人： Jong-Soo Choi ,  Yan Xin ,  Ju-Ho Lee ,  Joon-Young Cho

IPC分类号： H04L5/12

CPC分类号： H04L1/0041 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/0088 ,  H04L27/3488

摘要： A method for performing burst mapping on transmission data by a transmitter in a mobile communication system using a 16-ary Quadrature Amplitude Modulation (16-QAM) modulation scheme is disclosed. The burst mapping method includes generating control information bits and user data bits by encoding input control information and user data; dividing the control information bits and user data bits into more than two bursts; and arranging a Training Sequence Code (TSC) in a center of each burst, placing the coded control information bits in positions adjacent to the TSC, and swapping the user data bits with bits mapped to higher-reliability positions among the control information bits.

摘要翻译： 公开了一种使用16进制正交幅度调制（16-QAM）调制方案在移动通信系统中由发射机对传输数据执行突发映射的方法。 突发映射方法包括通过对输入控制信息和用户数据进行编码来产生控制信息位和用户数据位; 将控制信息位和用户数据位分成两个以上的脉冲串; 并将训练序列码（TSC）布置在每个脉冲串的中心，将编码的控制信息位置于与TSC相邻的位置，并且将控制信息位中映射到较高可靠性位置的位的用户数据位进行交换。

公开(公告)号：US11671115B2

公开(公告)日：2023-06-06

申请号：US17390367

申请日：2021-07-30

申请人： Guido Montorsi ,  Sergio Benedetto ,  Yan Xin ,  Min Yan

发明人： Guido Montorsi ,  Sergio Benedetto ,  Yan Xin ,  Min Yan

IPC分类号： H03M13/00 ,  H03M13/11 ,  H03M13/15

CPC分类号： H03M13/1157 ,  H03M13/1174 ,  H03M13/1575 ,  H03M13/616

摘要： Methods and devices are disclosed for encoding source words and decoding codewords with LDPC matrices, comprising: receiving a 1×K source word row vector ū; and generating a 1×N codeword vector c=ū·G, wherein G is a K×N generator matrix derived from a parity check matrix Hl; and wherein Hl is derived from a base parity check matrix H by summing different rows in the base parity check matrix H to obtain an intermediate parity check matrix, and applying a lifting matrix to the intermediate base parity check matrix to obtain Hl.

公开(公告)号：US08724724B2

公开(公告)日：2014-05-13

申请号：US13537429

申请日：2012-06-29

申请人： Yan Xin ,  Yongkang Jia ,  Huan Wu ,  Shouxing Qu ,  Arnold Sheynman

发明人： Yan Xin ,  Yongkang Jia ,  Huan Wu ,  Shouxing Qu ,  Arnold Sheynman

IPC分类号： H04W72/04 ,  H04W56/00

CPC分类号： H04J13/14 ,  H04J13/0014 ,  H04J13/0055 ,  H04J13/107

摘要： The present disclosure provides for the construction and use of a set of Zero-Correlation-Zone (ZCZ) Concatenated Complementary Pair (CCP) sequences with zero-correlation-zone range greater than one or with zero-correlation-zone range equal to one and the sequence set size greater than two. Complementary pair sequences A and B are selected and, for each member of the set of ZCZ CCP sequences, sign sequences pA and pB are combined with the complementary pair sequences to form a member ZCZ CCP sequence of the set. A ZCZ CCP sequence modified by propagation over a communication channel may be identified by cross-correlation with ZCZ CCP sequences of the set. A set of sign sequences may be constructed by recursive expansion from an initial set or found by a computer search. The sequences may be used in a transceiver of a portable electronic device or other communication device.

摘要翻译： 本公开提供了一组零相关区（ZCZ）并置互补对（CCP）序列的构造和使用，零相关区域范围大于1或零相关区域范围等于1， 序列集大小大于2。 选择互补对序列A和B，并且对于ZCZ CCP序列集合中的每个成员，符号序列pA和pB与互补对序列组合以形成该组的成员ZCZ CCP序列。 可以通过在通信信道上的传播修改的ZCZ CCP序列可以通过与该集合的ZCZ CCP序列的互相关来识别。 可以通过从初始集合的递归展开或通过计算机搜索找到的一组符号序列。 这些序列可以用在便携式电子设备或其他通信设备的收发器中。

公开(公告)号：US08717922B2

公开(公告)日：2014-05-06

申请号：US13284442

申请日：2011-10-28

申请人： Yan Xin ,  Kyungtae Kim ,  Sampath Rangarajan

发明人： Yan Xin ,  Kyungtae Kim ,  Sampath Rangarajan

IPC分类号： H04L12/26

CPC分类号： H04W16/14 ,  H04L27/0006

摘要： Spectrum sensing methods and systems for detecting spectrum holes for use in cognitive radio secondary transmissions are disclosed. In one method, an indication of an assignment of a set of subcarriers to a primary user is received. The method further includes determining multitaper spectral estimates for at least a subset of the set of subcarriers based on the assignment of the set of subcarriers to the primary user by processing samples for the at least a subset of the set of subcarriers. In addition, a test statistic that is based on the multitaper spectral estimates is compared to a threshold to determine whether the set of subcarriers is utilized for primary transmissions to the primary user. Moreover, data signals are received on at least one of the subcarriers in the set of subcarriers if the set of subcarriers is not utilized for primary transmissions to the primary user.

摘要翻译： 公开了用于在认知无线电二次传输中使用的用于检测频谱孔的频谱感测方法和系统。 在一种方法中，接收向主用户分配一组子载波的指示。 该方法还包括：通过处理子载波组的至少一个子集的样本，基于通过向主用户的子载波集合的分配来确定子载波组的至少子集的多频谱估计。 此外，将基于多频谱估计的测试统计量与阈值进行比较，以确定该副载波集合是否用于主用户的主要传输。 此外，如果子载波的集合不用于主要用户的主要传输，则在子载波组中的至少一个子载波上接收数据信号。

公开(公告)号：US08699712B2

公开(公告)日：2014-04-15

申请号：US13225116

申请日：2011-09-02

申请人： Yan Xin ,  Huan Wu ,  Raveendra Seetharam

发明人： Yan Xin ,  Huan Wu ,  Raveendra Seetharam

IPC分类号： H04W12/00 ,  H04L12/66 ,  H04J3/12 ,  H04B17/00 ,  H04B7/26

CPC分类号： H04W12/02 ,  H04L9/002 ,  H04L9/0668 ,  H04L2209/08 ,  H04L2209/80

摘要： The present document relates to the transmission of data in a digital cellular telecommunications network. In particular, the present document relates to the secure transmission of data over Global System for Mobile Communications (GSM) networks. A method for encoding a SACCH information block in a wireless network is described. The method comprises randomizing a plurality of randomization unit input bits derived from at least some of a plurality of payload bits of the SACCH information block using a pseudo-random bit block, thereby yielding a plurality of randomized bits; and ciphering a plurality of ciphering unit input bits derived from at least some of the plurality of randomized bits, thereby yielding an encoded data burst of a SACCH frame; wherein ciphering is based on a ciphering algorithm using a ciphering key Kc and a frame number COUNT of the SACCH frame; wherein the pseudo-random bit block is determined based on the ciphering key Kc.

摘要翻译： 本文件涉及数字蜂窝电信网络中的数据传输。 特别地，本文件涉及通过全球移动通信系统（GSM）网络的数据的安全传输。 描述了一种在无线网络中对SACCH信息块进行编码的方法。 该方法包括使用伪随机比特块随机化从SACCH信息块的多个有效负载比特中的至少一些导出的多个随机化单元输入比特，从而产生多个随机比特; 以及加密从所述多个随机化位中的至少一些导出的多个加密单元输入位，从而产生SACCH帧的编码数据突发; 其中加密基于使用加密密钥Kc和SACCH帧的帧号COUNT的加密算法; 其中，基于加密密钥Kc来确定伪随机比特块。

公开(公告)号：US08681731B2

公开(公告)日：2014-03-25

申请号：US12781771

申请日：2010-05-17

申请人： Werner Kreuzer ,  Michael Eoin Buckley ,  Yan Xin ,  Shouxing Qu ,  Sean Bartholomew Simmons

发明人： Werner Kreuzer ,  Michael Eoin Buckley ,  Yan Xin ,  Shouxing Qu ,  Sean Bartholomew Simmons

IPC分类号： H04W4/00

CPC分类号： H04L5/0042 ,  H04L5/0051 ,  H04L27/0008

摘要： Improved orthogonal frequency-division multiplexing (OFDM) communication slot structures and method are described. One example method includes converting a first portion of a set of bits to a first orthogonal frequency-division multiplexing symbol to be transmitted during a first portion of a time-division multiple access time slot, and converting a second portion of the set of bits to a second orthogonal frequency-division multiplexing symbol to be transmitted during a second portion of the time-division multiple access time slot. Other embodiments are shown and described.

摘要翻译： 描述了改进的正交频分复用（OFDM）通信时隙结构和方法。 一个示例性方法包括将一组比特的第一部分转换为在时分多址接入时隙的第一部分期间要发送的第一正交频分复用符号，并将该组比特的第二部分转换为 在时分多址存取时隙的第二部分期间发送的第二正交频分复用符号。 示出和描述其他实施例。

公开(公告)号：US20140036934A1

公开(公告)日：2014-02-06

申请号：US14000845

申请日：2011-02-21

申请人： Michael Eoin Buckley ,  Yan Xin ,  Shouxing Qu ,  Eswar Vutukuri

发明人： Michael Eoin Buckley ,  Yan Xin ,  Shouxing Qu ,  Eswar Vutukuri

IPC分类号： H04L27/26

CPC分类号： H04L27/2628 ,  H04L1/007 ,  H04L1/0072 ,  H04L25/0224 ,  H04L25/03159 ,  H04L25/03343 ,  H04L27/0008 ,  H04L27/18 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/34 ,  H04L2025/03414

摘要： A method and system for burst formatting of precoded EPGRS2 supporting legacy user multiplexing, the method generating, at a transmitter, a burst containing a plurality of inverse discrete Fourier transform (‘IDFT’) precoded symbols and plurality of non-IDFT precoded mid-amble symbols, wherein the IDFT precoded symbols are addressed for a first mobile device, and the non-IDFT precoded mid-amble symbols contain data addressed to a second mobile device.

摘要翻译： 一种用于突发格式化支持传统用户复用的预编码EPGRS2的方法和系统，该方法在发射机处产生包含多个离散傅里叶逆变换（“IDFT”）预编码符号和多个非IDFT预编码中置码的突发 符号，其中所述IDFT预编码符号被寻址用于第一移动设备，并且所述非IDFT预编码的中置码符号包含寻址到第二移动设备的数据。