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    • 8. 发明授权
    • Robust predictive deconvolution system and method
    • US06940450B2
    • 2005-09-06
    • US10673343
    • 2003-09-30
    • Shannon D. BluntKarl R. Gerlach
    • Shannon D. BluntKarl R. Gerlach
    • G01S7/292G01S13/28G01S7/32G01S13/00
    • G01S7/2921G01S13/284
    • A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(l)={tilde over (x)}T(l)s+v(l); applying RMMSE estimation to each successive N samples to obtain initial impulse response estimates [{circumflex over (x)}1{−(M−1)(N−1)}, . . . , {circumflex over (x)}1{−1}, {circumflex over (x)}1{0}, . . . , {circumflex over (x)}1{L−1}, {circumflex over (x)}1{L}, . . . , {circumflex over (x)}1{L−1+(M−1)(N−1)}]; computing power estimates {circumflex over (ρ)}1(l)=|{circumflex over (x)}1(l)|2 for l=−(M−1)(N−1), . . . , L−1+(M−1)(N−1); computing MMSE filters according to w(l)=ρ(l)(C(l)+R)−1s, where ρ(l)=|x(l)|2 is the power of x(l), and R=E[v(l)vH(l)] is the noise covariance matrix; applying the MMSE filters to y to obtain [{circumflex over (x)}2{−(M−2)(N−1)}, . . . , {circumflex over (x)}2{−1}, {circumflex over (x)}2{0}, . . . , {circumflex over (x)}2{L−1}, {circumflex over (x)}2{L}, . . . , {circumflex over (x)}2{L−1+(M−2)(N−1)}]; and repeating (d)-(f) for subsequent reiterative stages until a desired length-L range window is reached, thereby resolving the scatterer from noise and other scatterers. The RMMSE predictive deconvolution approach provides high-fidelity impulse response estimation. The RMMSE estimator can reiteratively estimate the MMSE filter for each specific impulse response coefficient by mitigating the interference from neighboring coefficients that is a result of the temporal (i.e. spatial) extent of the transmitted waveform. The result is a robust estimator that adaptively eliminates the spatial ambiguities that occur when a fixed receiver filter is used.
    • 10. 发明授权
    • Serial-parallel digital signal processor
    • 串行并行数字信号处理器
    • US5630161A
    • 1997-05-13
    • US428817
    • 1995-04-24
    • Richard G. BrancoEdward J. MonastraDavid J. Ovadia
    • Richard G. BrancoEdward J. MonastraDavid J. Ovadia
    • G06F15/16G01S7/292G01S7/32G01S13/02G06F15/80
    • G01S7/292G06F15/8007G01S2013/0272
    • A digital signal processor (24) includes a plurality of vector processors (212x), each of which is made up of a group of, for example, six signal processors (214x). Each signal processor includes Local 1 and Local 2 ports (201, 203), and the Local 1 port of one processor of a group is coupled by a path (218) to the Local 2 port of another processor, so the group forms a ring. Each signal processor (214) also includes a memory (234), an arithmetic processor (232), and a switcher (230) for making internal interconnections among the ports, and also includes a switcher control (364, 366). At least one of the signal processors (214) of each group is of a type including a further external port (206), by which data can be coupled by a path (105) to and from the group. The signal processors of each group can be interconnected for serial or parallel processing, all under the control of a group controller (216) associated with each vector processor.
    • 数字信号处理器(24)包括多个矢量处理器(212x),每个矢量处理器由一组例如六个信号处理器(214x)构成。 每个信号处理器包括本地1和本地2端口(201,203),并且组中的一个处理器的本地1端口通过路径(218)耦合到另一个处理器的本地2端口,因此该组形成环 。 每个信号处理器(214)还包括存储器(234),运算处理器(232)和用于在端口之间进行内部互连的切换器(230),并且还包括切换器控制(364,366)。 每个组的信号处理器(214)中的至少一个是包括进一步的外部端口(206)的类型,数据可以通过路径(105)耦合到组和从组中。 每个组的信号处理器可以互连用于串行或并行处理,全部在与每个向量处理器相关联的组控制器(216)的控制下。