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    • 52. 发明申请
    • METHOD AND APPARATUS FOR BLOCK-WISE DECISION-FEEDBACK EQUALIZATION FOR WIRELESS COMMUNICATION
    • 用于无线通信的块式决策反馈均衡的方法和装置
    • US20110310952A1
    • 2011-12-22
    • US12818976
    • 2010-06-18
    • Yongbin WeiByoung-Hoon KimDurga Prasad Malladi
    • Yongbin WeiByoung-Hoon KimDurga Prasad Malladi
    • H04L27/01
    • H04L25/03146H04L25/03159
    • Techniques for performing decision feedback equalization are described. A feed-forward filter response and a feedback filter response are derived based on a channel estimate and a reliability parameter and further without constraint on the feedback filter response or with a constraint of no feedback for an on-time sample. The reliability parameter is indicative of the reliability of the feedback used for equalization and may be frequency dependent or frequency invariant. Different feed-forward and feedback filter responses may be derived with different constraints on the feedback filter and different assumptions for the reliability parameter. Equalization is performed with the feed-forward and feedback filter responses. If equalization is performed for multiple iterations then, for each iteration, the reliability parameter may be updated, the feed-forward and feedback filter responses may be derived based on the updated reliability parameter, and equalization may be performed with the filter responses for the iteration.
    • 描述用于执行判决反馈均衡的技术。 基于信道估计和可靠性参数导出前馈滤波器响应和反馈滤波器响应,并且进一步不受反馈滤波器响应的约束或者对于准时采样的无反馈的约束。 可靠性参数表示用于均衡的反馈的可靠性,并且可以是频率依赖的或频率不变的。 不同的前馈和反馈滤波器响应可以通过反馈滤波器的不同约束和可靠性参数的不同假设得出。 使用前馈和反馈滤波器响应执行均衡。 如果对多次迭代执行均衡,那么对于每个迭代,可以更新可靠性参数,可以基于更新的可靠性参数导出前馈和反馈滤波器响应,并且可以用迭代的滤波器响应来执行均衡 。
    • 58. 发明授权
    • Method and apparatus for facilitating sensing in cognitive radio communications
    • 在认知无线电通信中促进感测的方法和装置
    • US08804536B2
    • 2014-08-12
    • US13210327
    • 2011-08-15
    • Alan BarbieriPeter GaalDurga Prasad MalladiYongbin Wei
    • Alan BarbieriPeter GaalDurga Prasad MalladiYongbin Wei
    • H04W24/00H04W4/00
    • H04W16/14H04W72/0426
    • Techniques are provided for the suppression of reference signal transmissions to enable sensing in cognitive radio communications. In one example, there is provided a method, operable by a network entity (e.g., evolved Node B), that may involve communicating with another network entity to determine parameters of a quiet period, the parameters comprising at least one of when the quiet period occurs and duration of the quiet period. The method may involve transmitting a reference signal in a first channel exclusively during a first plurality of subframes of a first frame period, wherein the first frame period further includes a quiet period during which no signals are transmitted, and performing during the quiet period a sensing operation with respect to the first channel.
    • 提供技术用于抑制参考信号传输以使得能够在认知无线电通信中进行感测。 在一个示例中,提供了一种由网络实体(例如,演进节点B)操作的方法,其可以涉及与另一网络实体通信以确定安静时段的参数,所述参数包括以下中的至少一个:静默时段 发生和安静期的持续时间。 该方法可以包括在第一帧周期的第一多个子帧期间专门在第一信道中发送参考信号,其中第一帧周期还包括在其期间不发送信号的静默时段,以及在安静周期期间执行感测 相对于第一通道的操作。
    • 59. 发明授权
    • Method and system for channel equalization
    • 信道均衡的方法和系统
    • US08594260B2
    • 2013-11-26
    • US12856503
    • 2010-08-13
    • Durga Prasad MalladiByoung-Hoon KimYongbin Wei
    • Durga Prasad MalladiByoung-Hoon KimYongbin Wei
    • H04B1/10
    • H04L25/03006H04L25/022H04L25/0228H04L2025/03375H04L2025/03783
    • 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.
    • 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。 第一个值包括一个误差信号。 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。
    • 60. 发明授权
    • Turbo interleaver for high data rates
    • Turbo交织器,用于高数据速率
    • US08583983B2
    • 2013-11-12
    • US12443975
    • 2007-11-01
    • Yongbin WeiJing SunDurga Prasad Malladi
    • Yongbin WeiJing SunDurga Prasad Malladi
    • H03M13/00
    • H03M13/2775H03M13/296H03M13/6561
    • Techniques for supporting high decoding throughput are described. A transmitter may encode a code block of data bits with a Turbo encoder. A receiver may perform decoding for the code block with a Turbo decoder having multiple soft-input soft-output (SISO) decoders. A contention-free Turbo interleaver may be used if the code block size is larger than a threshold size. A regular Turbo interleaver may be used if the code block size is equal to or smaller than the threshold size. The contention-free Turbo interleaver reorders the data bits in the code block such that information from the multiple SISO decoders, after interleaving or deinterleaving, can be written in parallel to multiple storage units in each write cycle without encountering memory access contention. The regular Turbo interleaver can reorder the data bits in the code block in any manner without regard to contention-free memory access.
    • 描述了用于支持高解码吞吐量的技术。 发射机可以使用Turbo编码器对数据位的码块进行编码。 接收机可以使用具有多个软输入软输出(SISO)解码器的Turbo解码器来对码块执行解码。 如果码块大小大于阈值大小,则可以使用无竞争的Turbo交织器。 如果码块大小等于或小于阈值大小,则可以使用常规Turbo交织器。 无竞争的Turbo交织器重新排序代码块中的数据位,使得来自多个SISO解码器的信息在交织或解交织之后可以在每个写周期中并行写入多个存储单元,而不会遇到存储器访问争用。 正常的Turbo交织器可以以任何方式重新排序代码块中的数据位,而不考虑无竞争的存储器访问。