用沃尔什域自动编码器，实现超宽带系统对5G干扰的12dB抑制。
Inter-Cell Interference Rejection Based on Ultrawideband Walsh-Domain Wireless Autoencoding
- 在沃尔什域设计端到端自动编码器，联合优化收发编码以抑制干扰
- 实测在基线信噪比下实现最高12dB干扰抑制，且误块率低
- 适合研究超宽带通信抗干扰或无线智能信号处理的工程师
本文提出一种新型技术，用于抑制超宽带通信系统中部分带内小区间干扰（ICI）。设计了一种端到端无线自编码器架构，联合优化发射机与接收机在沃尔什域的编码/解码过程，以缓解共存窄带5G基站带来的干扰。利用沃尔什函数的正交性与自逆特性，系统将比特字分布至并行沃尔什分支进行编码学习。通过分析建模与仿真，揭示了5G CPOFDM干扰在沃尔什域的映射规律，并确定了使自编码器达到最佳抑制效果的传输频率与采样率最优比例。实验结果表明，所提自编码器在相同基线信道噪声（即无干扰时的基线信噪比）条件下，可实现高达12 dB的ICI抑制，同时保持较低的误块率（BLER）。
原文摘要 · Abstract (English)
This paper proposes a novel technique for rejecting partial-in-band inter-cell interference (ICI) in ultrawideband communication systems. We present the design of an end-to-end wireless autoencoder architecture that jointly optimizes the transmitter and receiver encoding/decoding in the Walsh domain to mitigate interference from coexisting narrower-band 5G base stations. By exploiting the orthogonality and self-inverse properties of Walsh functions, the system distributes and learns to encode bit-words across parallel Walsh branches. Through analytical modeling and simulation, we characterize how 5G CPOFDM interference maps into the Walsh domain and identify optimal ratios of transmission frequencies and sampling rate where the end-to-end autoencoder achieves the highest rejection. Experimental results show that the proposed autoencoder achieves up to 12 dB of ICI rejection while maintaining a low block error rate (BLER) for the same baseline channel noise, i.e., baseline Signal-to-Noise-Ratio (SNR) without the interference.
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