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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (2): 688-694.doi: 10.7527/S1000-6893.2015.0125

• Electronics and Control • Previous Articles     Next Articles

Efficient design algorithm of low PAR waveform for wideband cognitive radar

TANG Bo   

  1. Lab 504, Electronic Engineering Institute, Hefei 230037, China
  • Received:2015-01-27 Revised:2015-05-05 Online:2016-02-15 Published:2015-05-25
  • Supported by:

    National Natural Science Foundation of China(61201379);Anhui Provincial Natural Science Foundation(1208085QF103,1608085MF123)

Abstract:

Transmit waveform design is a key technique in wideband cognitive radar. In order to improve the detection performance of range spread targets for wideband cognitive radar system, a target detection model is established. Then the detection performance associated with the signal model is analyzed. Afterward, the design method of low peak-to-average power ratio(PAR) waveform is studied based on maximizing signal-to-interference-plus-noise ratio(SINR). In the development of the proposed algorithm, the original waveform optimization problem is tackled by considering its equivalent form, which is a joint design problem of low PAR waveform and receiving filter. Based on the idea of cyclic optimization, an efficient design method for low PAR waveform is proposed. The output SINR of the designed constant envelope waveform is similar to that of the existing gradient descent method and convex optimization method. However, the proposed algorithm is much easier to implement and has considerably lower computational complexity. The effectiveness of the proposed algorithm is verified by the numerical simulations.

Key words: wideband cognitive radar, range spread target, waveform design, low peak to average power ratio(PAR) waveform, signal to interference plus noise ratio(SINR), cyclic optimization

CLC Number: