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    • 9. 发明授权
    • Methods and apparatus for design, adjustment or operation of wireless networks using multi-stage optimization
    • 使用多级优化设计,调整或操作无线网络的方法和设备
    • US06925066B1
    • 2005-08-02
    • US09628366
    • 2000-07-31
    • Chandra S. ChekuriLawrence M. DrabeckKarl Georg HampelPaul Anthony PolakosYihao Lisa Zhang
    • Chandra S. ChekuriLawrence M. DrabeckKarl Georg HampelPaul Anthony PolakosYihao Lisa Zhang
    • H04B7/208H04W16/18H04W24/02
    • H04W24/02H04W16/18
    • Techniques for use in designing, adjusting or operating a wireless network so as to provide a desired level of performance for the network. An optimization process is applied to a set of information characterizing the network. The optimization process is implemented as a multi-stage process which includes at least a frequency assignment stage and a post-frequency-assignment optimization stage, wherein the frequency assignment stage and the post-frequency-assignment stage are subject to iteration. For example, after an initial assignment of the frequencies in the frequency assignment stage, the post-frequency-assignment optimization stage may be performed, and based on the result of the optimization, at least one of the frequency assignment stage and the post-frequency-assignment optimization stage may be repeated. An output of the optimization process is utilized to determine one or more operating parameters of the wireless network, such as a base station transmit power or antenna orientation. The optimization process in an illustrative embodiment may be implemented as a three-stage process which includes a pre-frequency-assignment optimization stage, the frequency assignment stage and the post-frequency-assignment optimization stage, with one or more subsets of these stages being implemented in an iterative manner.
    • 用于设计,调整或操作无线网络以便为网络提供期望的性能水平的技术。 优化过程被应用于表征网络的一组信息。 该优化处理被实现为多级处理,其至少包括频率分配级和后频分配优化级,其中,频率分配级和后频分配级被进行迭代。 例如,在频率分配阶段中的频率的初始分配之后,可以执行后频分配优化级,并且基于优化的结果,频率分配级和后频中的至少一个 可以重复分配优化阶段。 利用优化过程的输出来确定无线网络的一个或多个操作参数,诸如基站发射功率或天线取向。 说明性实施例中的优化过程可以被实现为三阶段过程,其包括前频分配优化阶段,频率分配阶段和后频分配优化阶段,其中这些阶段的一个或多个子集是 以迭代的方式实现。
    • 10. 发明授权
    • Symmetric sweep phase sweep transmit diversity
    • 对称扫描相位扫描发射分集
    • US06920314B2
    • 2005-07-19
    • US09918392
    • 2001-07-30
    • Roger David BenningR. Michael BuehrerPaul Anthony PolakosRobert Atmaram Soni
    • Roger David BenningR. Michael BuehrerPaul Anthony PolakosRobert Atmaram Soni
    • H04B7/06A04B1/02
    • H04B7/0669H04B7/0678
    • Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without degrading performance of either STS or PSTD using a symmetric sweep PSTD transmission architecture. In one embodiment, a pair of signals s1 and s2 are split into signals s1(a) and s1(b) and signals s2(a) and s2(b), respectively. Signal s1 comprises a first STS/OTD signal belonging to an STS/OTD pair, and signal s2 comprises a second STS/OTD signal belonging to the STS/OTD pair. Signals s1(b) and s2(b) are phase swept using a pair of phase sweep frequency signals that would cancel out any self induced interference. For example, the pair of phase sweep frequency signals utilize a same phase sweep frequency with one of the phase sweep frequency signals rotating in the opposite direction plus an offset of π relative to the other phase sweep frequency signal. The resultant phase swept signals s1(b) and s2(b) are added to signals s2(a) and s1(a) before being amplified and transmitted.
    • 这里描述了一种用于传输的方法和装置,其提供空间时间扩展(STS)或正交发射分集(OTD)的性能以及相位扫描发射分集(PSTD)的向后兼容性,而不会降低使用对称的STS或PSTD的性能 扫描PSTD传输架构。 在一个实施例中,一对信号s 1和s 2 2被分割成信号s 1(a)和s 1 < (b)和信号s 2(a)和s 2(b)。 信号S1 <1>包括属于STS / OTD对的第一STS / OTD信号,信号s 2包括属于STS / OTD对的第二STS / OTD信号 。 使用一对可以消除任何自身干扰的相位扫描频率信号来相位扫描信号s 1(b)和s 2(b)。 例如,该对相位扫描频率信号利用相同的相位扫描频率,其中相位扫描频率信号中的一个相反方向旋转加上相对于另一个相位扫描频率信号的pi偏移。 所得到的相位扫描信号s 1(b)和s 2(b)被加到信号s2(a)和s