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    • 72. 发明申请
    • Doppler adaptation using pilot patterns within single user, multiple user, multiple access, and/or MIMO wireless communications
    • 在单用户,多用户,多路访问和/或MIMO无线通信中使用导频模式的多普勒适配
    • US20120269142A1
    • 2012-10-25
    • US13453998
    • 2012-04-23
    • Ron PoratVinko Erceg
    • Ron PoratVinko Erceg
    • H04W72/04H03G3/20
    • H04L27/2618H04L27/2602H04L27/2613H04L27/2666H04W52/18H04W72/1231H04W84/12
    • Doppler adaptation using pilot patterns within single user, multiple user, multiple access, and/or MIMO wireless communications. Within a communication system employing orthogonal frequency division multiplexing (OFDM) signaling, pilots may be adaptively and/or selectively located at different respective sub-carrier or tone locations within different respective symbols based on one or more patterns. In some implementations, decimation may also be performed such that not necessarily all respective tone or sub-carrier locations are covered within one particular group. Multiple respective groups may be employed to cover all possible tone or sub-carrier locations with at least one pilot over a particular number of symbols. In a receiver communication device operating using such decimation, interpolation over the decimated set of tones or sub-carriers may be made to effectuate channel estimate updates.
    • 在单用户,多用户,多路访问和/或MIMO无线通信中使用导频模式的多普勒适配。 在采用正交频分复用(OFDM)信令的通信系统中,导频可以基于一个或多个模式自适应地和/或选择性地位于不同相应符号内的不同相应子载波或音调位置。 在一些实现中,还可以执行抽取,使得不一定在一个特定组内覆盖所有相应的音调或子载波位置。 可以使用多个相应的组来覆盖在特定数量的符号上的至少一个导频的所有可能的音调或子载波位置。 在使用这种抽取操作的接收机通信设备中,可以对抽取的一组音调或子载波进行内插以实现信道估计更新。
    • 74. 发明授权
    • Signal transmission parameter control using channel sounding
    • 信号传输参数控制采用声道探测
    • US08170601B2
    • 2012-05-01
    • US13272678
    • 2011-10-13
    • Ron Porat
    • Ron Porat
    • H04B1/00H04B17/00H04B7/00H04B1/04
    • H04W88/08H04L5/0007H04L5/0051H04L25/0228H04L25/03343H04L27/2662H04L2025/03815H04W52/241
    • A base station (BTS) may instruct a client station (CS) to transmit sounding signals that the BTS may analyze to determine what adjustments, such as power, time, and/or frequency adjustment(s) should be made by the CS. The BTS may control when and how the sounding signals are sent by the CS. This helps reduce the possibility of adjustment signals transmitted by two or more CSs colliding. Thus, sounding signals transmitted by the CS in response to a request by the BTS can be received by the BTS with higher a probability of success. This permits the BTS to more accurately characterize the channel and to provide better adjustment of power level, frequency offset, and/or timing offset for more optimal communication. Such techniques can be used to reduce bit error rates and to improve the overall signal to noise ratio encountered by the system.
    • 基站(BTS)可以指示客户站(CS)发送BTS可以分析的探测信号,以确定CS应该进行哪些调整,诸如功率,时间和/或频率调整。 BTS可以控制CS的发送信号的时间和方式。 这有助于减少由两个或多个CS发生的调整信号的碰撞的可能性。 因此,响应于BTS的请求,由CS发送的探测信号可以由BTS以更高的成功概率接收。 这允许BTS更准确地表征信道,并且为了更优化的通信而提供功率电平,频率偏移和/或定时偏移的更好的调整。 这样的技术可以用于降低误码率并提高系统遇到的整体信噪比。
    • 78. 发明申请
    • CLOSED FORM SINGULAR VALUE DECOMPOSITION
    • 封闭形式的单值分解
    • US20110164700A1
    • 2011-07-07
    • US12986635
    • 2011-01-07
    • Ron PoratYi Jiang
    • Ron PoratYi Jiang
    • H04B7/02
    • H04B7/0626H04B7/0417H04L5/0023H04L25/03343
    • The subject matter disclosed herein provides methods and apparatus for determining a singular value decomposition, providing feedback from a client station to a base station, and closed loop operation of a wireless system implementing multiple-input multiple-output (MIMO). The method may include determining one or more singular vectors using a closed form singular value decomposition. The one or more determined singular vectors may be provided to a precoder at the base station as feedback. The method may include aligning a phase of one or more singular vectors. The method may also include determining, at a client station, a plurality of singular vectors for channels used in a MIMO transmission from a base station to a client station. The client station may provide an indication to the base station regarding whether to use a singular value decomposition or a uniform channel decomposition. Related systems, apparatus, methods, and/or articles are also described.
    • 本文公开的主题提供了用于确定奇异值分解,提供从客户站到基站的反馈以及实现多输入多输出(MIMO)的无线系统的闭环操作的方法和装置。 该方法可以包括使用闭合形式奇异值分解来确定一个或多个奇异向量。 可以将一个或多个确定的奇异向量作为反馈提供给基站处的预编码器。 该方法可以包括对齐一个或多个奇异矢量的相位。 该方法还可以包括在客户端站处确定在从基站到客户站的MIMO传输中使用的信道的多个奇异向量。 客户端站可以向基站提供关于是使用奇异值分解还是均匀信道分解的指示。 还描述了相关系统,装置,方法和/或制品。