Abstract: This paper proposes a simple method of designing an oversampled, near-perfect reconstruction DFT modulated filter bank. According to the requirement of system distortion and aliasing power, a simple objective function is introduced, and the prototype filter is designed with the equiripple method. Compared with traditional methods, the proposed method optimizes a single parameter instead of the complex nonlinear optimization, and the design process is simplified. This approach can minimize the passband error under the filter-bank design criteria. By using weighted overlap and add (WOLA) structure, the system can be implemented efficiently, which is suitable for speech signal analysis and synthesis in hearing aids.