Due to the heavy congestion in HF bands, HF radars are restricted to operating within narrow frequency bands. To improve the system bandwidth and avoid heavy interference bands, a quasi-random step frequency signal with discontinuous bands is presented. A novel two-dimensional signal processing scheme for this signal is proposed on the basis of delicate signal analysis. Simulation results demonstrate that the scheme could successfully realize the resolutions by de- Due to the heavy congestion in HF bands, HF radars are restricted to operating within narrow band bands. A novel two-dimensional signal processing scheme for this signal is proposed on the basis of which signal is proposed on the basis of the precise signal analysis. Simulation results demonstrate that the scheme could successfully realize the resolutions by de-