Shankarachary Ragi

HEURISTIC ALGORITHMS FOR DESIGNING UNIMODULAR CODE SEQUENCES WITH PERFORMANCE GUARANTEES

  • Edwin K.P. Chong
  • Hans D Mittelmann
  • Shankarachary Ragi
    • Categories Applications - Science and Engineering Tags , , , ,

    In this study, we develop heuristic methods to solve unimodular quadratic programming (UQP) approximately, which is known to be NP-hard. UQP-type problems appear naturally in radar waveform design and active sensing applications. In the UQP framework, we optimize a sequence of complex variables with unit modulus by maximizing a quadratic function. To solve the UQP … Read more

    Directional Sensor Control: Heuristic Approaches

  • Edwin K.P. Chong
  • Hans D Mittelmann
  • Shankarachary Ragi
    • Categories Control Applications, Meta Heuristics Tags , , ,

    We study the problem of controlling multiple 2-D directional sensors while maximizing an objective function based on the information gain corresponding to multiple target locations. We assume a joint prior Gaussian distribution for the target locations. A sensor generates a (noisy) measurement of a target only if the target lies within the field-of-view of the … Read more