Bi-discriminator GAN for tabular data synthesis

• Developing a novel data preprocessing scheme using Chi-squared function. • Proposing a new conditional term for the generator network in a GAN setup. • Implementing a bi-discriminator GAN for stable training. • Designing straightforward architectures for generator and discriminator networks. This paper introduces a bi-discriminator GAN for synthesizing tabular datasets containing continuous, binary, and discrete columns. Our proposed approach employs an adapted preprocessing scheme and a novel conditional term using the χ β 2 distribution for the generator network to more effectively capture the input sample distributions. Additionally, we implement straightforward yet effective architectures for discriminator networks aiming at providing more discriminative gradient information to the generator. Our experimental results on four benchmarking public datasets corroborates the superior performance of our GAN both in terms of likelihood fitness metric and machine learning efficacy.