首页|Polarization-based optimal detection scheme for digital self-interference cancellation in full-duplex system

Polarization-based optimal detection scheme for digital self-interference cancellation in full-duplex system

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In order to detect and cancel the self-interference (SI) signal from desired binary phase-shift keying (BPSK) signal,the polarization-based optimal detection (POD) scheme for cancellation of digital SI in a full-duplex (FD) system is proposed.The POD scheme exploits the polarization domain to isolate the desired signal from the SI signal and then cancel the SI to obtain the interference-free desired signal at the receiver.In FD communication,after antenna and analog cancellation,the receiver still contains residual SI due to non-linearities of hardware imperfections.In POD scheme,a likelihood ratio expression is obtained,which isolates and detects SI bits from the desired bits.After isolation of these signal points,the POD scheme cancels the residual SI.As compared to the conventional schemes,the proposed POD scheme gives significantly low bit error rate (BER),a clear constellation diagram to obtain the boundary between desired and SI signal points,and increases the receiver's SI cancellation performance in low signal to interference ratio (SIR) environment.

polarizationfull-duplexself-interference cancellationoptimal detection

Adil Khan、Zhang Jinling、Muhammad Ayzed Mirza、Sibghat Ullah、Erum Abbasi、Babar Hayat

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School of Electronic Engineering, Beijing University of Posts and Telecommunication, Beijing 100876, China

This work was supported by the Fundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of Chinaand the Huawei Innovation Research Program (HIRP)

2019XD-A07617710632018040300246.

2020

中国邮电高校学报(英文版)
北京邮电大学

中国邮电高校学报(英文版)

CSCDEI
影响因子：0.419
ISSN：1005-8885
年,卷(期)：2020.27(3)
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