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Conventional orthogonal frequency division multiplexing (OFDM) waveformdesign in integrated sensing and communications (ISAC) systems usually selectsthe channels with high-frequency responses to transmit communication data,which does not fully consider the possible interference in the environment. Tomitigate these adverse effects, we propose an optimization model by weightingbetween peak sidelobe level and communication data rate, with power andcommunication subcarrier interval constraints. To tackle the resultantnonconvex problem, an iterative adaptive cyclic minimization (ACM) algorithm isdeveloped, where an adaptive iterative factor is introduced to improveconvergence. Subsequently, the least squares algorithm is used to reduce thecoefficient of variation of envelopes by further optimizing the phase of theOFDM waveform. Finally, the numerical simulations are provided to demonstratethe interference-resilient ability of the proposed OFDM strategy and therobustness of the ACM algorithm.

Interference-Resilient OFDM Waveform Design with Subcarrier Interval Constraint for ISAC Systems