Abstract: In a wideband radar receiver, in order to reduce the performance requirements of the analog-to-digital conversion unit for wideband signal sampling, a stretch processing method is required to debase the sampling signal bandwidth for the received broadband signal. Usually, conventional stretch processing algorithms contain a digital delay filter module. Whereas, it is not suitable for large-scale array radar due to its shortcomings of high complexity and expensive cost. To deal with this problem, this paper proposes a stretch processing algorithm without digital delay filter. Specifically, the proposed algorithm exploits frequency and phase compensation to replace the digital delay filter to ensure the consistency of the output of each channel, thereby significantly reducing the complexity of the system. Meanwhile, subarrays are leveraged to reduce the number of channels to be processed, which further reduces the complexity of the system. In addition, the proposed algorithm also equips with the ability to analyze the boundary conditions of the echo delay estimation error. Finally, simulation results show that the proposed algorithm can obtain a higher output signal-to-noise ratio compared with the conventional stretch processing methods, and is less sensitive to echo delay estimation errors.