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Multi-tap Digital Canceller for Full-Duplex Applications. (arXiv:1706.09764v1 [cs.IT])
来源于:arXiv
We identify phase noise as a bottleneck for the performance of digital
self-interference cancellers that utilize a single auxiliary
receiver---single-tap digital cancellers---and operate in multipath propagation
environments. Our analysis demonstrates that the degradation due to phase noise
is caused by a mismatch between the analog delay of the auxiliary receiver and
the different delays of the multipath components of the self-interference
signal. We propose a novel multi-tap digital self-interference canceller
architecture that is based on multiple auxiliary receivers and a customized
Normalized-Least-Mean-Squared (NLMS) filtering for self-interference
regeneration. Our simulation results demonstrate that our proposed architecture
is more robust to phase noise impairments and can in some cases achieve 10~dB
larger self-interference cancellation than the single-tap architecture. 查看全文>>