公开(公告)号：US08879656B2

公开(公告)日：2014-11-04

申请号：US13538186

申请日：2012-06-29

申请人： Chin-Liang Wang ,  Hung-Chin Wang ,  Ying-Yi Chen

发明人： Chin-Liang Wang ,  Hung-Chin Wang ,  Ying-Yi Chen

IPC分类号： H04B7/02

CPC分类号： H04J13/0062 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/068 ,  H04B7/0684 ,  H04L27/2657 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2688 ,  H04L27/2692

摘要： A cooperative multiple-input multiple-output system based on partial Zadoff-Chu sequences and a synchronization method thereof are disclosed, and the system comprises a plurality of transmitters and a receiver. Each transmitter's training signal is disposed in a subband having a length of V, and the training signal is converted into a time domain signal. The receiver receives the time domain signals of the cooperating transmitters. Each transmitter extracts V successive samples from any region of a Zadoff-Chu sequence having a length equal to a multiple of V and the samples are disposed in an exclusive subband as the training signal. When the training signals of cooperating transmitters are converted into time and frequency domain signals, the training signals of all the transmitters are separated from each other to suppress mutual interference in both time and frequency domains and to improve the performance of synchronization.

摘要翻译： 公开了一种基于部分Zadoff-Chu序列的协同多输入多输出系统及其同步方法，该系统包括多个发射机和接收机。 每个发射机的训练信号被设置在长度为V的子带中，训练信号被转换成时域信号。 接收机接收协作发射机的时域信号。 每个发射机从具有等于V的倍数的长度的Zadoff-Chu序列的任何区域提取V个连续采样，并且样本被布置在专用子带中作为训练信号。 当协同发射机的训练信号转换为时域和频域信号时，所有发射机的训练信号彼此分离，以抑制时域和频域的相互干扰，提高同步性能。

公开(公告)号：US08665983B2

公开(公告)日：2014-03-04

申请号：US13602416

申请日：2012-09-04

申请人： Chin-Liang Wang ,  Hung-Chin Wang ,  Mian-Cheng Lin

发明人： Chin-Liang Wang ,  Hung-Chin Wang ,  Mian-Cheng Lin

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04B7/024 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/006 ,  H04L27/2662 ,  H04L27/2671 ,  H04L27/2676 ,  H04L27/2689

摘要： An apparatus for cooperative multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) is provided. The apparatus uses a new carrier assignment scheme (CAS) called generalized interleaved CAS, along with non-data-aided timing synchronization. With the generalized interleaved CAS, random OFDM signals are formed into patterns similar to unequal period synchronization patterns (UPSPs), and a corresponding non-data-aided timing synchronization scheme is set. With the help of majority vote refinement (MVR), the present invention achieves better timing synchronization and enhances the quality of signal demodulation.

摘要翻译： 提供了一种用于协作多输入多输出（MIMO）正交频分复用（OFDM）的装置。 该装置使用称为广义交织CAS的新载波分配方案（CAS）以及非数据辅助定时同步。 利用广义交错CAS，随机OFDM信号形成类似于不等周期同步模式（UPSP）的模式，并且设置相应的非数据辅助定时同步方案。 通过多数投票优化（MVR）的帮助，本发明实现了更好的定时同步，并提高了信号解调的质量。

公开(公告)号：US20130315324A1

公开(公告)日：2013-11-28

申请号：US13602416

申请日：2012-09-04

申请人： Chin-Liang Wang ,  Hung-Chin Wang ,  Mian-Cheng Lin

发明人： Chin-Liang Wang ,  Hung-Chin Wang ,  Mian-Cheng Lin

IPC分类号： H04B7/02

CPC分类号： H04B7/024 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/006 ,  H04L27/2662 ,  H04L27/2671 ,  H04L27/2676 ,  H04L27/2689

摘要： An apparatus for cooperative multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) is provided. The apparatus uses a new carrier assignment scheme (CAS) called generalized interleaved CAS, along with non-data-aided timing synchronization. With the generalized interleaved CAS, random OFDM signals are formed into patterns similar to unequal period synchronization patterns (UPSPs), and a corresponding non-data-aided timing synchronization scheme is set. With the help of majority vote refinement (MVR), the present invention achieves better timing synchronization and enhances the quality of signal demodulation.

摘要翻译： 提供了一种用于协作多输入多输出（MIMO）正交频分复用（OFDM）的装置。 该装置使用称为广义交织CAS的新载波分配方案（CAS）以及非数据辅助定时同步。 利用广义交错CAS，随机OFDM信号形成类似于不等周期同步模式（UPSP）的模式，并且设置相应的非数据辅助定时同步方案。 通过多数投票优化（MVR）的帮助，本发明实现了更好的定时同步，并提高了信号解调的质量。

公开(公告)号：US20130045748A1

公开(公告)日：2013-02-21

申请号：US13407735

申请日：2012-02-28

申请人： Phone LIN ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

发明人： Phone LIN ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

IPC分类号： H04W36/32

CPC分类号： H04W36/0055 ,  H04W84/045

摘要： A method for reducing the handover frequency by a femto gateway in femtocell networks includes the steps: receiving a measurement report from a communication device by an initial femtocell; transmitting a relocation required message to a femto gateway by the initial femtocell if the signal strength thereof is below a threshold; ignoring the relocation required message and enabling the timer by the femto gateway after receiving the relocation required message; determining whether the cell ID included in the call reestablishment request message is classified as “femtocell” or not by the femto gateway before the timer expires; if so, rebuilding the link to the femtocell in response to the cell ID by the femto gateway.

摘要翻译： 一种用于在毫微微小区网络中通过毫微微网关降低切换频率的方法包括以下步骤：由初始毫微微小区从通信设备接收测量报告; 如果所述初始毫微微小区的信号强度低于阈值，则向所述毫微微网关发送重定位所需消息; 忽略重定位所需消息，并在接收到重定位所需消息之后由毫微微网关启用定时器; 在所述定时器期满之前，确定所述呼叫重建请求消息中包括的小区ID是否被所述毫微微网关分类为毫微微小区; 如果是，则响应于毫微微网关的小区ID重建到毫微微小区的链路。

公开(公告)号：US06704367B1

公开(公告)日：2004-03-09

申请号：US09625652

申请日：2000-07-26

申请人： Chin-Liang Wang ,  Yuan-Shuo Chang

发明人： Chin-Liang Wang ,  Yuan-Shuo Chang

IPC分类号： H04J100

CPC分类号： H04L27/2608

摘要： A discrete loading algorithm maximizes data rate or system performance margin for discrete multitone (DMT) transmission. A preliminary bit assignment for each subchannel is first obtained by optimizing a DMT system with an available bandwidth. The subchannels that receive negative bit assignments are then excluded for further optimization until all the bit assignments are positive. The bit assignment of each subchannel is rounded and a corresponding rounding error is calculated. If the total bit number of the bit assignments are greater than the available bandwidth, the bit assignment of the subchannel having the least rounding error is decreased by one bit. If the total bit number of the bit assignments are smaller than the available bandwidth, the bit assignment of the subchannel having the largest rounding error is increased by one bit.

摘要翻译： 离散加载算法使离散多音（DMT）传输的数据速率或系统性能裕度最大化。 首先通过优化具有可用带宽的DMT系统来获得每个子信道的初步位分配。 然后排除接收负位分配的子通道进一步优化，直到所有位分配为正。 每个子通道的位分配被舍入，并且计算相应的舍入误差。 如果比特分配的总比特数大于可用带宽，则具有最小舍入误差的子信道的比特分配减少一比特。 如果比特分配的总比特数小于可用带宽，则具有最大舍入误差的子信道的比特分配增加1比特。

公开(公告)号：US08849285B2

公开(公告)日：2014-09-30

申请号：US13426607

申请日：2012-03-22

申请人： Phone Lin ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

发明人： Phone Lin ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

IPC分类号： H04W36/00 ,  H04W84/04

CPC分类号： H04W36/0083 ,  H04W84/045

摘要： A method for reducing the handover frequency by a communication device in femtocell networks includes the steps: measuring the radio signal strength by a communication device and storing the information of the serving base station into a cache memory; checking whether the stored information in the cache memory is classified as “femtocell” or not; if so, deleting the macrocell's information from the measurement report by the communication device and transmitting this to the serving base station; when the radio link failure occurred, checking whether the stored information in the cache memory is classified as “femtocell” or not; if so, initiating a timer; detecting an available femtocell before the timer expires; transmitting a call reestablishment request message to the available femtocell for rebuilding the link.

摘要翻译： 一种用于通过毫微微小区网络中的通信设备降低切换频率的方法包括以下步骤：通过通信设备测量无线电信号强度并将服务基站的信息存储到高速缓冲存储器中; 检查高速缓冲存储器中存储的信息是否被分类为“毫微微小区”; 如果是，则由通信设备从测量报告中删除宏小区的信息并将其发送到服务基站; 当发生无线链路故障时，检查高速缓冲存储器中存储的信息是否被分类为“毫微微小区”; 如果是，启动定时器; 在定时器到期之前检测可用的毫微微小区; 向所述可用毫微微蜂窝基站发送呼叫重建请求消息以重建所述链路。

公开(公告)号：US08731093B2

公开(公告)日：2014-05-20

申请号：US13527921

申请日：2012-06-20

申请人： Chih-Peng Li ,  Kuei-Cheng Chan ,  Yu-Sing Lin ,  Chin-Liang Wang

发明人： Chih-Peng Li ,  Kuei-Cheng Chan ,  Yu-Sing Lin ,  Chin-Liang Wang

IPC分类号： H04B7/02

CPC分类号： H04L25/03159 ,  H04B7/0413 ,  H04L25/022 ,  H04L25/0226 ,  H04L27/2613

摘要： The present invention discloses a communication system with a data-dependent superimposed training mechanism and a communication method thereof. The system uses a precoding module installed in front of the data-dependent superimposed training mechanism to precode data by a precoding matrix. The precoding matrix is a N×N unitary matrix, which is constructed by Q×Q precoding sub-matrix. Q is the block size N divided by the channel length. The precoding matrix can achieve full frequency diversity. Any two sets of data precoded by the precoding matrix must be different from each other, such that the receiver can effectively identify the data transmitted from the transmitter and the computational complexity of the receiver is reduced.

摘要翻译： 本发明公开了一种具有数据依赖的叠加训练机构及其通信方法的通信系统。 该系统使用安装在依赖于数据的叠加训练机构之前的预编码模块，以通过预编码矩阵对数据进行预编码。 预编码矩阵是由Q×Q预编码子矩阵构成的N×N酉矩阵。 Q是块大小N除以通道长度。 预编码矩阵可以实现全频分集。 由预编码矩阵预编码的任何两组数据必须彼此不同，使得接收机可以有效地识别从发射机发送的数据，并减少接收机的计算复杂度。

公开(公告)号：US20130195024A1

公开(公告)日：2013-08-01

申请号：US13527973

申请日：2012-06-20

申请人： Yuh-Ren Tsai ,  Hao Yun Huang ,  Chin-Liang Wang

发明人： Yuh-Ren Tsai ,  Hao Yun Huang ,  Chin-Liang Wang

IPC分类号： H04W72/04

CPC分类号： H04B7/024

摘要： A communication method of coordinated multi-point transmission systems. Based on the Zadoff-Chu sequences, multiple training sequences are implemented, and the training sequences are a set of robust orthogonal training sequence (ROTS). Preamble signals that use the set of training sequences can be transmitted from multiple base stations/relay stations at the same time. In the case with the mixture signal of multiple preamble signals, user equipment can still use the received signal to estimate multiple carrier frequency offsets of the corresponding base stations/relay stations.

摘要翻译： 协调多点传输系统的通信方法。 基于Zadoff-Chu序列，实现了多个训练序列，训练序列是一组鲁棒正交训练序列（ROTS）。 可以同时从多个基站/中继站发送使用该组训练序列的前导码信号。 在具有多个前同步信号的混合信号的情况下，用户设备仍然可以使用接收到的信号来估计对应的基站/中继站的多个载波频率偏移。

公开(公告)号：US20130045745A1

公开(公告)日：2013-02-21

申请号：US13426607

申请日：2012-03-22

申请人： Phone LIN ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

发明人： Phone LIN ,  Chia-Peng Lee ,  Chin-Liang Wang ,  Whai-En Chen

IPC分类号： H04W36/26

CPC分类号： H04W36/0083 ,  H04W84/045

摘要： A method for reducing the handover frequency by a communication device in femtocell networks includes the steps: measuring the radio signal strength by a communication device and storing the information of the serving base station into a cache memory; checking whether the stored information in the cache memory is classified as “femtocell” or not; if so, deleting the macrocell's information from the measurement report by the communication device and transmitting this to the serving base station; when the radio link failure occurred, checking whether the stored information in the cache memory is classified as “femtocell” or not; if so, initiating a timer; detecting an available femtocell before the timer expires; transmitting a call reestablishment request message to the available femtocell for rebuilding the link.

摘要翻译： 一种用于通过毫微微小区网络中的通信设备降低切换频率的方法包括以下步骤：通过通信设备测量无线电信号强度并将服务基站的信息存储到高速缓冲存储器中; 检查高速缓冲存储器中存储的信息是否被分类为毫微微小区; 如果是，则由通信设备从测量报告中删除宏小区的信息并将其发送到服务基站; 当发生无线链路故障时，检查高速缓冲存储器中存储的信息是否被分类为毫微微蜂窝基站; 如果是，启动定时器; 在定时器到期之前检测可用的毫微微小区; 向所述可用毫微微蜂窝基站发送呼叫重建请求消息以重建所述链路。

公开(公告)号：US20060034363A1

公开(公告)日：2006-02-16

申请号：US11251751

申请日：2005-10-18

申请人： Chin-Liang Wang ,  Yuan-Shuo Chang ,  Chih-Ming Hsu

发明人： Chin-Liang Wang ,  Yuan-Shuo Chang ,  Chih-Ming Hsu

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L27/2647 ,  H04L2025/03617

摘要： A novel structure for the TEQ in a DMT system receiver to shorten the length of the effective channel impulse response is provided. A time-domain equalizer, based on the decision-feedback filter structure, along with a training method is disclosed. In accordance with the DFE-based TEQ in the DMT system, the data symbols that transmitted through the effective shortened channel would be more reliable.