公开(公告)号：US08600413B2

公开(公告)日：2013-12-03

申请号：US12259809

申请日：2008-10-28

Applicant: Juan Montojo ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Sandip Sarkar

Inventor： Juan Montojo ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Sandip Sarkar

IPC: H04W68/00

CPC classification number: H04W68/02 ,  H04W68/025

Abstract: Systems and methods for utilizing paging group IDs and paging indicators are disclosed for PDCCH and PDSCH transmissions to mobile terminals in a mobile communication system. By use of the paging group IDs and paging indicators, various groups of mobile terminals, including subsets of those groups can be paged with reduced decoding requirements. Nesting of the grouping is exploited and packing of the PDCCH frame to accomplish efficient use is described.

公开(公告)号：US08503555B2

公开(公告)日：2013-08-06

申请号：US13214621

申请日：2011-08-22

Applicant: Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Jelena Damnjanovic

Inventor： Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Jelena Damnjanovic

IPC: H04K1/10

CPC classification number: H04L1/0026 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/066 ,  H04L1/0029 ,  H04L1/06 ,  H04L27/2608

Abstract: Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.

Abstract translation: 描述使用差分编码有效地发送信道状态信息的技术。 差分编码可以跨越空间，跨频率，跨空间和频率跨越空间，频率和时间，或跨越一些其他维度组合来执行。 在一种设计中，可以为多个子带上的多个空间信道确定空间状态信息。 空间信道可以对应于不同的天线，不同的预编码向量等。可以为多个子带上的多个空间信道获得信道质量指示符（CQI）值。 CQI值可以在多个空间信道和多个子带之间进行差分编码，以获得差分CQI信息。 在另一种设计中，可以在多个时间间隔中对多个子带上的多个空间信道获得CQI值，并且可以在空间，频率和时间之间进行差分编码。 差分CQI信息和空间状态信息可以作为反馈发送。

公开(公告)号：US08412257B2

公开(公告)日：2013-04-02

申请号：US13162420

申请日：2011-06-16

Applicant: Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Sandip Sarkar

Inventor： Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Sandip Sarkar

IPC: H04B7/00

CPC classification number: H04L1/0036 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/16 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0037 ,  H04L5/006

Abstract: Techniques for selecting transmit formats in a manner to account for the degrees of resource reuse for multiple data streams sent simultaneously from multiple antennas are described. The degree of resource reuse for each data stream indicates the amount of reuse of resources (e.g., orthogonal codes or subcarriers) observed by that stream. Interference estimates for the multiple data streams are derived based on an initial resource assignment. The degrees of resource reuse are determined based on the interference estimates and are used to derive at least one correction factor. At least one transmit format is then selected for the data streams using the at least one correction factor. Each data stream is associated with a transmit format that indicates the amount of resources to use for the data stream and other parameters. Resources are assigned to each data stream in accordance with its transmit format.

Abstract translation: 描述了以考虑从多个天线同时发送的多个数据流的资源重用程度来选择发送格式的技术。 每个数据流的资源重用程度指示由该流观察到的资源（例如，正交码或子载波）的重用量。 基于初始资源分配导出多个数据流的干扰估计。 基于干扰估计来确定资源重用度，并且用于导出至少一个校正因子。 然后使用至少一个校正因子为数据流选择至少一个发送格式。 每个数据流与指示用于数据流的资源量和其他参数的发送格式相关联。 根据其发送格式将资源分配给每个数据流。

公开(公告)号：US08385276B2

公开(公告)日：2013-02-26

申请号：US12500517

申请日：2009-07-09

Applicant: Byoung-Hoon Kim ,  Peter Gaal ,  Yongbin Wei

Inventor： Byoung-Hoon Kim ,  Peter Gaal ,  Yongbin Wei

IPC: H04W4/00

CPC classification number: H04L27/2657 ,  H04L27/2676 ,  H04L27/2695 ,  H04L27/3845

Abstract: Systems and methodologies are described that facilitate computing discriminator signals for frequency tracking in wireless communications. The discriminator signal can be computed based at least in part on representations of a received signal shifted upward by a portion of a frequency tone and downward by the portion of the frequency tone. The shifted signals can be summed, and a dot product of the summed signals and a channel estimation of the original signal can be computed to remove uncertain frequency response due to fading. The discriminator signal can be computed as the imaginary portion of the dot product. A frequency error offset can be determined from the discriminator signal and applied to a receiver to tune alignment of the receiver with frequencies of received signals.

Abstract translation: 描述了在无线通信中促进用于频率跟踪的鉴别器信号的系统和方法。 可以至少部分地基于由向上移动频率一部分并且向下移动频率音调的部分的接收信号的表示来计算鉴别器信号。 移位的信号可以相加，并且可以计算求和的信号和原始信号的信道估计的积积以消除由于衰落引起的不确定的频率响应。 鉴别器信号可以计算为点积的虚部。 可以根据鉴别器信号确定频率误差偏移，并将其应用于接收机，以便将接收机与接收信号的频率进行对准。

公开(公告)号：US20130003816A1

公开(公告)日：2013-01-03

申请号：US13608116

申请日：2012-09-10

Applicant: Byoung-Hoon Kim

Inventor： Byoung-Hoon Kim

IPC: H04L27/01

CPC classification number: H04B7/04 ,  H04L25/0204 ,  H04L25/0228

Abstract: Techniques for performing channel and noise estimation for a MIMO transmission sent from multiple transmit antennas to multiple receive antennas are described. Samples are obtained from the receive antennas. For a first scheme, channel estimates are derived by correlating the samples with at least one pilot sequence, and signal, noise and interference statistics are also estimated based on the samples. For a second scheme, total received energy as well as signal and interference energy are estimated based on the samples. Noise is then estimated based on the estimated total received energy and the estimated signal and interference energy. For a third scheme, signal and on-time interference statistics are estimated based on the samples. Noise and multipath interference statistics are also estimated based on the samples. Signal, noise and interference statistics are then estimated based on the estimated signal and on-time interference statistics and the estimated noise and multipath interference statistics.

Abstract translation: 描述用于对从多个发射天线发送到多个接收天线的MIMO传输进行信道和噪声估计的技术。 从接收天线获得样本。 对于第一方案，通过将样本与至少一个导频序列相关而导出信道估计，并且信号，噪声和干扰统计也是基于样本估计的。 对于第二种方案，基于样本估计总接收能量以及信号和干扰能量。 然后基于估计的总接收能量和估计的信号和干扰能量来估计噪声。 对于第三种方案，基于样本估计信号和准时干扰统计。 噪声和多径干扰统计也根据样本进行估计。 然后，基于估计的信号和准时干扰统计以及估计的噪声和多径干扰统计来估计信号，噪声和干扰统计。

公开(公告)号：US08271043B2

公开(公告)日：2012-09-18

申请号：US11841578

申请日：2007-08-20

Applicant: Byoung-Hoon Kim ,  Durga Prasad Malladi

Inventor： Byoung-Hoon Kim ,  Durga Prasad Malladi

IPC: H04M1/00

CPC classification number: H04B7/0686 ,  H04B7/0413 ,  H04B7/0465 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0874 ,  H04B17/24 ,  H04B17/336 ,  H04W72/1231

Abstract: An apparatus and method to dynamically schedule user devices in a wireless communication system in single-user multiple-input multiple-output (SU-MIMO) or multiple-user multiple-input multiple-output (MU-MIMO) modes of operation. The dynamic scheduling employs an efficient differential reporting of channel state information that reduces uplink feedback overhead, whereby a base layer value of a channel quality indicator (CQI) is reported in conjunction with a CQI offset value. Antenna subset selection is also reported. The offset value reflects gains by detection with successive interference cancellation if multiple antennas are reported (rank>1), while it reflects the actual offset between single-layer SU-MIMO CQI and MU-MIMO CQI if a single antenna is reported. Scheduled SU-MIMO mode of operation is optimized for a user reporting either a single antenna or multiple antennas, whereas MU-MIMO operation is optimized for a user reporting a single antenna.

Abstract translation: 一种在单用户多输入多输出（SU-MIMO）或多用户多输入多输出（MU-MIMO）操作模式中的无线通信系统中动态调度用户设备的装置和方法。 动态调度使用减少上行链路反馈开销的信道状态信息的有效差分报告，由此结合CQI偏移值报告信道质量指示符（CQI）的基本层值。 天线子集选择也被报道。 如果报告多个天线（秩> 1），则偏移值反映通过连续干扰消除的检测的增益，而如果报告单个天线，其反映单层SU-MIMO CQI与MU-MIMO CQI之间的实际偏移。 为报告单个天线或多个天线的用户优化了调度的SU-MIMO操作模式，而针对报告单个天线的用户优化了MU-MIMO操作。

公开(公告)号：US08130857B2

公开(公告)日：2012-03-06

申请号：US11624646

申请日：2007-01-18

Applicant: Byoung-Hoon Kim ,  Yongbin Wei ,  Amir Dabbagh

Inventor： Byoung-Hoon Kim ,  Yongbin Wei ,  Amir Dabbagh

IPC: H04B7/08

CPC classification number: H04J13/0003 ,  H04B7/0421 ,  H04B7/0671 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0697 ,  H04B17/309 ,  H04B2201/70701 ,  H04J3/00 ,  H04J13/0022 ,  H04J13/0059 ,  H04J13/0062 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0051 ,  H04L5/06 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2636

Abstract: Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In another aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas based on frequency-domain code division multiplexing (FD-CDM) of a Chu sequence defined by a transmitter-specific value. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In yet another aspect, a transmitter station generates multiple pilot transmissions for multiple transmit antennas based on a first multiplexing scheme and generates multiple data transmissions based on a second multiplexing scheme that is different from the first multiplexing scheme.

Abstract translation: 描述用于在无线传输中复用导频的技术。 在一个方面，发射机站为多个发射天线生成多个导频序列，每个导频序列包括在不同子载波集上的时域中发送的导频符号。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于由发射机特定值定义的楚序列的频域码分复用（FD-CDM），为多个发射天线生成多个导频序列。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于第一复用方案为多个发射天线生成多个导频传输，并且基于与第一复用方案不同的第二复用方案来生成多个数据传输。

公开(公告)号：US20100310027A1

公开(公告)日：2010-12-09

申请号：US12856503

申请日：2010-08-13

Applicant: Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Yongbin Wei

Inventor： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Yongbin Wei

IPC: H04B1/10

CPC classification number: H04L25/03006 ,  H04L25/022 ,  H04L25/0228 ,  H04L2025/03375 ,  H04L2025/03783

Abstract: One embodiment includes a method of receiving a transmitted signal. The method comprises receiving a signal transmitted over a channel. The signal comprises a known signal and an information signal. The method further includes determining at least one indicator of channel characteristics based at least in part on the portion of the known signal. The method further includes generating a first value indicative of the information signal based at least in part on the at least one indicator of the channel characteristics. The first value comprises an error signal. The method further comprises removing the error signal from the first estimate of the signal based at least in part on the portion of the known signal. Other embodiments include systems for performing the method and methods of making such systems.

Abstract translation: 一个实施例包括接收发射信号的方法。 该方法包括接收通过信道发送的信号。 信号包括已知信号和信息信号。 该方法还包括至少部分地基于已知信号的部分来确定信道特性的至少一个指示符。 该方法还包括至少部分地基于信道特性的至少一个指示符来生成指示信息信号的第一值。 第一值包括误差信号。 该方法还包括至少部分地基于已知信号的部分从信号的第一估计中去除误差信号。 其他实施例包括用于执行制造这种系统的方法和方法的系统。

公开(公告)号：US20100182979A1

公开(公告)日：2010-07-22

申请号：US12439714

申请日：2007-10-01

Applicant: Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Tao Luo

Inventor： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Tao Luo

IPC: H04W56/00

CPC classification number: H04L27/2613 ,  H04B2201/70701 ,  H04J11/0069 ,  H04J13/0059 ,  H04J13/107

Abstract: Techniques for facilitating cell search by user equipments (UEs) in a wireless communication system are described. In an aspect, a primary synchronization code (PSC) sequence may be generated based on a Frank sequence and a constant amplitude sequence that is repeated multiple times. In another aspect, a set of PSC sequences may be generated based on complementary sequences having good aperiodic correlation properties and efficient implementations. In one design, PSC sequences A+B and B+A may be formed based on Golay complementary sequences A and B, there “+” denotes concatenation. In yet another aspect, a set of secondary synchronization code (SSC) sequences may be generated based on a set of base sequences and different modulation symbols of a modulation scheme. Each base sequence may be modulated by each of M possible modulation symbols for the modulation scheme to obtain M different SSC sequences.

Abstract translation: 描述了用于在无线通信系统中用于用户设备（UE）的小区搜索的技术。 在一方面，可以基于Frank序列和重复多次的恒定幅度序列来生成主同步码（PSC）序列。 在另一方面，可以基于具有良好的非周期相关性质和有效实现的互补序列来生成一组PSC序列。 在一种设计中，可以基于Golay互补序列A和B形成PSC序列A + B和B + A，“+”表示连接。 在另一方面，可以基于一组基本序列和调制方案的不同调制符号来生成一组次同步码（SSC）序列。 每个基本序列可以由用于调制方案的M个可能调制符号中的每一个调制以获得M个不同的SSC序列。

公开(公告)号：US20100182975A1

公开(公告)日：2010-07-22

申请号：US12439727

申请日：2007-10-02

Applicant: Durga Prasad Malladi ,  Byoung-Hoon Kim

Inventor： Durga Prasad Malladi ,  Byoung-Hoon Kim

IPC: H04W72/04

CPC classification number: H04L1/1671 ,  H04L1/1664 ,  H04L5/023

Abstract: Techniques for transmitting acknowledgement (ACK) information in a wireless communication system are described. The system supports data transmission to multiple user equipments (UEs) on the same downlink resources with spatial division multiple access (SDMA). A base station sends a data transmission with multiple (M) layers to M UEs. The downlink resources used for the data transmission are associated with ACK resources used to send ACK information for the data transmission. The ACK resources may be partitioned into M portions, e.g., based on frequency division multiplexing (FDM). Each of the M layers is associated with a respective portion of the ACK resources. A recipient UE for each layer sends ACK for that layer on the associated portion of the ACK resources. For each ACK resource portion, one or more pilot symbols may be sent on one or more resource elements, and ACK symbols may be sent on remaining resource elements.

Abstract translation: 描述用于在无线通信系统中发送确认（ACK）信息的技术。 该系统支持使用空分多址（SDMA）在相同下行链路资源上向多个用户设备（UE）传输数据。 基站向M个UE发送具有多个（M）层的数据传输。 用于数据传输的下行链路资源与用于发送用于数据传输的ACK信息的ACK资源相关联。 ACK资源可以被划分为M个部分，例如基于频分复用（FDM）。 每个M层与ACK资源的相应部分相关联。 每个层的接收者UE在ACK资源的相关部分上为该层发送ACK。 对于每个ACK资源部分，可以在一个或多个资源元素上发送一个或多个导频符号，并且可以在剩余的资源元素上发送ACK符号。