| Summary: | This paper proposes a memory-efficient deep neural network (DNN) framework-based symbol level precoding (SLP). We focus on a DNN with realistic finite precision weights and adopt an unsupervised deep learning (DL) based SLP model (SLP-DNet). We apply a stochastic quantization (SQ) technique to obtain its corresponding quantized version called SLP-SQDNet. The proposed scheme offers a scalable performance vs memory trade-off, by quantizing a scalable percentage of the DNN weights, and we explore binary and ternary quantizations. Our results show that while SLP-DNet provides near-optimal performance, its quantized versions through SQ yield <inline-formula> <tex-math notation="LaTeX">$\sim 3.46\times $ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$\sim 2.64\times $ </tex-math></inline-formula> model compression for binary-based and ternary-based SLP-SQDNets, respectively. We also find that our proposals offer <inline-formula> <tex-math notation="LaTeX">$\sim 20\times $ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$\sim 10\times $ </tex-math></inline-formula> computational complexity reductions compared to SLP optimization-based and SLP-DNet, respectively.
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