公开(公告)号：US08330529B1

公开(公告)日：2012-12-11

申请号：US12696010

申请日：2010-01-28

申请人： Wenfeng Zhang ,  Qi Zhang

发明人： Wenfeng Zhang ,  Qi Zhang

IPC分类号： H03K3/01

CPC分类号： G05F1/575

摘要： Embodiments of a method, apparatus and circuit for voltage regulation are disclosed. One embodiment of a circuit includes a first field effect transistor (FET) having a gate, a drain and a source. A current source is connected to the drain of the FET. A second FET has a source connected to the source of the first FET by a node. The second FET also has a gate. A low-pass filter circuit has an input connected to the gate of the first FET and an output connected to the gate of the second FET.

摘要翻译： 公开了用于电压调节的方法，装置和电路的实施例。 电路的一个实施例包括具有栅极，漏极和源极的第一场效应晶体管（FET）。 电流源连接到FET的漏极。 第二FET具有通过节点连接到第一FET的源极的源极。 第二个FET也有一个门。 低通滤波器电路具有连接到第一FET的栅极的输入端和连接到第二FET的栅极的输出端。

公开(公告)号：US07839173B1

公开(公告)日：2010-11-23

申请号：US12539522

申请日：2009-08-11

申请人： Wenfeng Zhang ,  Qi Zhang ,  Jian Tan

发明人： Wenfeng Zhang ,  Qi Zhang ,  Jian Tan

IPC分类号： H03K19/0175

CPC分类号： H03K19/018521 ,  H03K19/01714

摘要： A system for signal level shifting in an IC can include a first inverter having a first pull-up device and a pull-down device, wherein the first inverter is operable to receive an input signal having a voltage potential at a logic high that does not disable the first pull-up device. The system can include a second inverter coupled in series to an output of the first inverter, and a control module coupled to the output of the first inverter and an output of the second inverter. Prior to the input signal transitioning to the logic high, the control module is operable to decouple the input signal from the first pull-up device, disable the first pull-up device, and close a feedback loop that latches an output state of the second inverter.

摘要翻译： 用于IC中的信号电平移位的系统可以包括具有第一上拉装置和下拉装置的第一反相器，其中第一反相器可操作以接收具有不高于逻辑高的电压电位的输入信号 禁用第一个上拉设备。 该系统可以包括与第一反相器的输出串联耦合的第二反相器，以及耦合到第一反相器的输出和第二反相器的输出的控制模块。 在输入信号转换到逻辑高电平之前，控制模块可操作以将输入信号与第一上拉装置去耦，禁用第一上拉装置，并闭合锁存第二上拉装置的输出状态的反馈环路 逆变器。

公开(公告)号：US08798655B2

公开(公告)日：2014-08-05

申请号：US13258310

申请日：2010-10-20

申请人： Yunfeng Sun ,  Wenfeng Zhang ,  Jing Jiang ,  Junfeng Zhang

发明人： Yunfeng Sun ,  Wenfeng Zhang ,  Jing Jiang ,  Junfeng Zhang

IPC分类号： H04W72/00 ,  H04B7/00 ,  H04W52/14 ,  H04W52/42 ,  H04W52/32 ,  H04L5/00

摘要： The present disclosure discloses a transmission power configuration method for a Demodulation Reference Signal (DMRS), and the method comprises: configuring the ratio between transmission power of a DMRS at each layer in a Resource Element (RE) and transmission power of data at a corresponding layer to be a constant value. Meanwhile, the present disclosure discloses a transmission power configuration apparatus for the DMRS. The present disclosure greatly improves the correct rate of data frame decoding, and improves decoding performance. The present disclosure enables the network side not need to notify a UE of the corresponding relationship between transmission power of DMRS at each layer and transmission power of data at the corresponding layer, which simplifies the overhead of the control signalling in the network side. As the corresponding relationship between transmission power of DMRS at each layer and transmission power of data at the corresponding layer is configured in the UE, the UE can implement channel estimation without waiting for the notification from the network side, which improves the channel estimation efficiency.

公开(公告)号：US20130208678A1

公开(公告)日：2013-08-15

申请号：US13817117

申请日：2011-08-16

申请人： Wenfeng Zhang

发明人： Wenfeng Zhang

IPC分类号： H04W72/04

CPC分类号： H04W72/0406 ,  H04L5/0053 ,  H04L5/0094

摘要： Systems and methods for the configuration of channel state information reference signals (CSI-RS) are disclosed. The systems and methods include providing user equipment with the locations of CSI-RS reuse information. Several encoding patterns and exemplary methodology for both the identification of the CSI-RS resource element locations are provided in exemplary embodiments. In addition, exemplary embodiments provide muting methods and systems for a physical downlink shared channel resource elements.

摘要翻译： 公开了用于配置信道状态信息参考信号（CSI-RS）的系统和方法。 系统和方法包括向用户设备提供CSI-RS重用信息的位置。 在示例性实施例中提供了用于CSI-RS资源元素位置的识别的几种编码模式和示例性方法。 此外，示例性实施例提供用于物理下行链路共享信道资源元素的静默方法和系统。

公开(公告)号：US20130128860A1

公开(公告)日：2013-05-23

申请号：US13701475

申请日：2011-06-01

申请人： Wenfeng Zhang

发明人： Wenfeng Zhang

IPC分类号： H04W72/04

CPC分类号： H04W72/04 ,  H04L5/0053 ,  H04L27/2601

摘要： A method of allocating resource elements in an orthogonal frequency division multiplexed (OFDM) system for transmission of a channel state information reference signal (CSI-RS) without overlapping with resource elements allocated to a port-5 user equipment-specific reference signal (URS) signal is disclosed. The method can include shifting in a frequency domain at least a portion of resource elements allocated to the CSI-RS in a normal-CP subframe. According to certain embodiments, the allocation of resource elements can be defined per an 8-port CSI-RS, or per a group of eight CSI-RS resource elements, within a single physical resource block (PRB) whose time-domain dimension is one subframe and whose frequency-domain dimension is 12 subcarriers.

摘要翻译： 一种在正交频分复用（OFDM）系统中分配资源元素以发送信道状态信息参考信号（CSI-RS）而不与分配给端口-5用户设备专用参考信号（URS）的资源元素重叠的方法， 信号被公开。 该方法可以包括在频域中移动在正常CP子帧中分配给CSI-RS的资源元素的至少一部分。 根据某些实施例，可以在其时域维度为一个的单个物理资源块（PRB）内，每个8端口CSI-RS或每八组CSI-RS资源元素定义资源元素的分配 子帧，其频域维度为12个子载波。

公开(公告)号：US20130088949A1

公开(公告)日：2013-04-11

申请号：US13579494

申请日：2011-02-24

申请人： Wenfeng Zhang ,  Jing Jiang

发明人： Wenfeng Zhang ,  Jing Jiang

IPC分类号： H04W72/04

CPC分类号： H04W72/04 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053

摘要： A method of allocating resource elements in an orthogonal frequency division multiplexed (OFDM) system for transmission of a channel state information reference signal (CSI-RS) is disclosed. The method includes converting one or more resource elements to a two-dimensional frequency-time domain; and partitioning the one or more converted resource elements to units of a physical resource block (PRB). One or more resource elements are patterned over at least a portion of the PRB for transmission of the CSI-RS. According to an embodiment, the CSI-RS resource elements with a same subcarrier index for a common cell are code division multiplexed (CDM), with a CDM dimension equal to a number of CSI-RS resource elements with the same subcarrier index for the common cell.

摘要翻译： 公开了一种在正交频分复用（OFDM）系统中分配资源元素以发送信道状态信息参考信号（CSI-RS）的方法。 该方法包括将一个或多个资源元素转换为二维频域 - 时域; 以及将所述一个或多个转换的资源元素划分为物理资源块（PRB）的单元。 在PRB的至少一部分上图案化一个或多个资源元素以传输CSI-RS。 根据实施例，对于公共小区具有相同子载波索引的CSI-RS资源元素是码分多路复用（CDM），其CDM维度等于具有相同副载波索引的CSI-RS资源元素的数量 细胞。

公开(公告)号：US08233413B2

公开(公告)日：2012-07-31

申请号：US12367467

申请日：2009-02-06

申请人： Wenfeng Zhang ,  Yonggang Fang

发明人： Wenfeng Zhang ,  Yonggang Fang

IPC分类号： H04J3/00

CPC分类号： H04B7/2656 ,  H04L5/14 ,  H04W56/003 ,  H04W72/0446 ,  H04W72/0493 ,  H04W72/1263

摘要： Techniques, apparatuses, and systems for dynamically changing downlink and uplink allocations can include operating a base station under time division duplexing to communicate with one or more mobile devices using a frame structure, adjusting a downlink-uplink ratio to change an allocation between uplink and downlink data capacities in the frame structure, determining a mute interval based on the adjusted downlink-uplink ratio, generating mute information based on the mute interval to identify the one or more areas of the frame structure effected by the allocation change, and transmitting the mute information to the one or more mobile devices.

摘要翻译： 用于动态改变下行链路和上行链路分配的技术，装置和系统可以包括在时分双工下运行基站以使用帧结构与一个或多个移动设备进行通信，调整下行链路 - 上行链路比率以改变上行链路和下行链路之间的分配 在帧结构中的数据容量，基于经调整的下行链路上行链路比率确定静默间隔，基于静默间隔产生静音信息，以识别由分配改变影响的帧结构的一个或多个区域，以及发送静音信息 到一个或多个移动设备。

公开(公告)号：US20120120854A1

公开(公告)日：2012-05-17

申请号：US13318120

申请日：2010-04-27

申请人： Wenfeng Zhang ,  Yuhong Duan ,  Jian Hu ,  Zhifeng Ma ,  Zhongdang Du ,  Bin Yu

发明人： Wenfeng Zhang ,  Yuhong Duan ,  Jian Hu ,  Zhifeng Ma ,  Zhongdang Du ,  Bin Yu

IPC分类号： H04W72/04 ,  H04J3/00

CPC分类号： H04B7/2656 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0493 ,  H04W72/12

摘要： A method and system for dynamic adjustment of downlink/uplink resource allocation ratio in a long-term evolution (LTE) time division duplex (TDD) system is disclosed. The method includes replacing at least one uplink subframe in a subframe pattern with at least one of a mute subframe and a mute uplink pilot timeslot (UpPTS), within a geographical guard area that isolates at least two areas having different TDD allocation patterns. The method further includes scheduling an uplink transmission from at least one mobile terminal such that the at least one of the mute subframe and the mute UpPTS are unused. A simple solution or a TDD configuration index substitution solution, or any combination thereof, may be used to control the uplink transmission involving a mute subframe or a mute UpPTS.

摘要翻译： 公开了一种用于长期演进（LTE）时分双工（TDD）系统中的下行链路/上行链路资源分配比的动态调整的方法和系统。 该方法包括在隔离具有不同TDD分配模式的至少两个区域的地理保护区域内，用至少一个静音子帧和静音上行链路导频时隙（UpPTS）来替换子帧模式中的至少一个上行链路子帧。 该方法还包括调度来自至少一个移动终端的上行链路传输，使得静音子帧和静音UpPTS中的至少一个未被使用。 可以使用简单的解决方案或TDD配置索引替代解决方案或其任何组合来控制涉及静音子帧或静音UpPTS的上行链路传输。

公开(公告)号：US07430241B2

公开(公告)日：2008-09-30

申请号：US10388553

申请日：2003-03-14

申请人： Subramanian Vasudevan ,  Yunsong Yang ,  Wenfeng Zhang

发明人： Subramanian Vasudevan ,  Yunsong Yang ,  Wenfeng Zhang

IPC分类号： H04L27/00

CPC分类号： H04L1/0071 ,  H04L1/0001 ,  H04L1/001 ,  H04L1/0032 ,  H04L1/0038 ,  H04L1/0046 ,  H04L1/0059 ,  H04L1/0072 ,  H04L1/08

摘要： A system and method for transmitting and receiving control information over a control channel of a wireless communication system where the conveyed information is coded and then transformed by a set of transform function selected from a plurality of sets of transform functions. The control information is transmitted as replicated sub-frames containing replicated code words and such a string of transformed replicated code words is referred to as a control message. At a receive end inverse transform functions from different sets of functions are applied to a sub-frame of a control message so that if the sub-frame is successfully decoded the inverse transform function applied to such frame allows the timing of the control message to be determined.

摘要翻译： 一种用于在无线通信系统的控制信道上发送和接收控制信息的系统和方法，其中传送的信息被编码，然后通过从多组变换函数中选择的一组变换函数进行变换。 作为包含复制码字的复制子帧发送控制信息，将这样的变换后的复制码字串称为控制消息。 在接收端，来自不同功能集合的逆变换函数被应用于控制消息的子帧，使得如果子帧被成功解码，则应用于这样的帧的逆变换功能允许控制消息的定时为 决心。

公开(公告)号：US07251228B2

公开(公告)日：2007-07-31

申请号：US10091674

申请日：2002-03-05

申请人： Douglas N. Knisely ,  Subramanian Vasudevan ,  Yunsong Yan ,  Wenfeng Zhang

发明人： Douglas N. Knisely ,  Subramanian Vasudevan ,  Yunsong Yan ,  Wenfeng Zhang

IPC分类号： H04Q7/00

CPC分类号： H04W36/0083

摘要： A method for switching cells by a mobile equipment of a communication system. The mobile transmits a signal coded with a spreading code indicating the mobile's intent to switch cells and the coded information also identifies to which cell the mobile wants to switch. The coded information contains channel measurement adjustment information that is continuously transmitted to the cell which is currently serving the mobile. The flow of channel measurement adjustment information is therefore not disturbed by the application of the method of the present invention. Because the coded information identifies the target cell and indicates the mobile's intent to perform a cell switching procedure, the amount of processing done by the cells is significantly reduced thus increasing the likelihood of a successful switching procedure.

摘要翻译： 一种通过通信系统的移动设备切换小区的方法。 移动台发送用指示移动台切换小区的意图的扩展码编码的信号，并且编码信息还标识移动台想要切换到哪个小区。 编码信息包含连续发送到当前正在为移动台服务的小区的信道测量调整信息。 因此，通过应用本发明的方法，不会妨碍信道测量调整信息的流动。 由于编码信息识别目标小区并且指示移动台执行小区切换过程的意图，所以小区完成的处理量显着减少，从而增加成功切换过程的可能性。