Tractable MIMO beampattern design under constant modulus waveform constraint

Omar Aldayel, Vishal Monga, Muralidhar Rangaswamy

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Scopus citations

    Abstract

    Multiple-Input Multiple-Output (MIMO) radar system allows each antenna element to transmit a different waveform. This waveform diversity can be utilized to enhance the beampattern design, in particular effective management of radar radiation power in directions of interest. In this paper, we address the problem of designing a beampattern for Multiple-Input Multiple-Output (MIMO) radar, which in turn is determined by the transmit waveform. While unconstrained design is straightforward, a key open challenge is enforcing the constant modulus constraint on the radar waveform. Existing beampattern design methods that address constant modulus invariably lead to a stiff trade-off between analytical tractability (achieved by relaxations and approximations) and realistic design that exactly achieves constant modulus but is computationally burdensome. A new approach is proposed in our work, which involves solving the hard non-convex problem of beampattern design using a sequence of convex Equality Constrained Quadratic Programs, each of which has a closed form solution. Constant modulus is achieved at convergence, which we prove formally is possible under mild and realistic assumptions. We evaluate the proposed successive closed forms (SCF) algorithm against state of the art MIMO beampattern design techniques and show that SCF breaks the trade-off between desirable performance and the associated computation cost.

    Original languageEnglish (US)
    Title of host publication2016 IEEE Radar Conference, RadarConf 2016
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781509008636
    DOIs
    StatePublished - Jun 3 2016
    Event2016 IEEE Radar Conference, RadarConf 2016 - Philadelphia, United States
    Duration: May 2 2016May 6 2016

    Other

    Other2016 IEEE Radar Conference, RadarConf 2016
    CountryUnited States
    CityPhiladelphia
    Period5/2/165/6/16

    All Science Journal Classification (ASJC) codes

    • Signal Processing
    • Computer Networks and Communications
    • Instrumentation

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  • Cite this

    Aldayel, O., Monga, V., & Rangaswamy, M. (2016). Tractable MIMO beampattern design under constant modulus waveform constraint. In 2016 IEEE Radar Conference, RadarConf 2016 [7485317] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RADAR.2016.7485317