Abstract
In this paper, a novel method for designing unequally spaced time-modulated arrays (UESTMAs) with fewer optimization parameters in two steps has been investigated. Different cases of synthesis method such as position-only (PO), on-time only (OTO), on-time then position (OTTP) and position then on-time (PTOT) have been considered to design the array. For each case under consideration, the global search stochastic algorithm based on differential evolution (DE) has been employed to achieve the array pattern with significantly suppressed sidelobe levels (SLLs) and sideband levels (SBLs) by separately considering the element position and switch on-time of the array elements as the optimization parameters. Through detail comparative results, it is shown that the performance of PTOT synthesis method with fewer optimization parameters in two steps provides better or equivalent performance as compared with the reported approach where both position and on-time are considered simultaneously. The representative numerical results for a 32 element linear array have been presented to show the effectiveness of the proposed approach.
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Patra, S., Mandal, S.K., Mahanti, G.K., Pathak, N. (2021). Synthesis of Unequally Spaced Time-Modulated Linear Arrays Through Optimized Position and On-Time Using Differential Evolution. In: Banerjee, S., Mandal, J.K. (eds) Advances in Smart Communication Technology and Information Processing. Lecture Notes in Networks and Systems, vol 165. Springer, Singapore. https://doi.org/10.1007/978-981-15-9433-5_11
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