The phase and amplitude weights of each element in an adaptive, digitally beamformed array antenna can be calculated by a systolic parallel processor. The authors propose that the entire weight calculation (both QR decomposition, previously discussed by W.M. Gentleman and H.T. Kung (1981), and the back-substitutions, which are presented for the first time) be performed in a triangular array of processors. This has the highly desirable property of graceful degradation: the loss of one or more component processors does not cause the computed weights to degrade catastrophically. The loss of a processor in the systolic array merely reduces the number of available degrees of freedom. Moreover, the processing array does not need to be globally reconfigured; the functions of all the remaining processors are unaffected and their interconnections are undisturbed. The authors describe the processing flow in the systolic array, show how its degradation is inherently graceful, and present a realistic example of graceful degradation.<>


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Graceful degradation of an adaptive beamforming processor


    Contributors:


    Publication date :

    1992-01-01


    Size :

    743578 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Graceful Degradation of Cooperative Adaptive Cruise Control

    Ploeg, Jeroen / Semsar-Kazerooni, Elham / Lijster, Guido et al. | IEEE | 2015



    Graceful Degradation for Driver Assistance Systems

    Holzknecht, S. / Biebl, E. / Michel, H.U. | British Library Conference Proceedings | 2009


    Graceful degradation for driver assistance systems

    Holzknecht, S. / Biebl, E. / Michel, H.U. | Tema Archive | 2009


    Adaptive fault tolerance and graceful degradation under dynamic hard real-time scheduling

    Gonzalez, O. / Shrikumar, H. / Stankovic, J.A. et al. | Tema Archive | 1997