A simple self-interference cancellation technique for full duplex communication

In this paper, a novel passive antenna cancellation technique for a full-duplex system is presented. This includes three patch antennas with a developed coupler that are constructed and integrated with the feed network to reduce the self-interference signal without the need for other components, thus achieving a complete antenna cancellation method. Computer Simulation Technology (CST) microwave studio is utilized to simulate the design model. A prototype was fabricated and tested practically to validate the proposed design. The computed results are compared with measurements. The proposed technique provides up to 68 dB cancellation at the operating frequency 2.45 GHz, and this decreases to 40 dB at 70 MHz bandwidth, and to 36 dB at 100 MHz bandwidth.

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“…This method can reduce part of the self-interference signal. Therefore, it must be followed by the next stages [8,9].…”

Section: Review Of Cancellation Methodsmentioning

confidence: 99%

Integrated Antenna Technique for Cancelling the Self-Interference Signal in Full-Duplex Communication

Jasim¹,

Sayidmarie²,

Abd‐Alhameed³

et al. 2019

PIER C

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“…The authors claimed that we have exploited unutilized channel over multiple GHz of bandwidth spectrum. Antenna separation is presented to diminish the impact of SI [20]. Antenna design was modeled on monopole antennas in computer simulation software.…”

Section: Literature Reviewmentioning

confidence: 99%

Self Interference Cancellation in Co-Time-Co-Frequency Full Duplex Cellular Communication

Memon¹,

Dahri²,

Abro³

et al. 2018

ijacsa

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The performance of co-time co-frequency full duplex (CCDF) communication systems is limited by the selfinterference (SI), which is the result of using the same frequency for transmission and reception. However, current communication systems use separate frequencies for transmission and reception, respectively. Therefore, SI is an important issue to be fixed for future-generation systems. As the radio frequency (RF) spectrum is very scared and a CCDF system has the potential to reduce the current spectrum use by half. In this paper, a CCDF communication system is modeled and a combination of RF and digital cancellations is used to mitigate the SI. The simulation results reveal that the proposed combination of RF and digital cancellation achieve the bit-errorrate of 10 -11 at an interference-to-signal ratio of 10 dB, which is satisfying value for CCDF communication. The achieved efficiency of the proposed system is 13 bits/sec/Hz at a signal-tonoise ratio of 50 dB. The antenna separation of 35 dB is considered for the proposed model to keep the data loss as minimum as possible. The performance can be improved further by increasing digital-to-analog converter bits but with added complexity.

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“…Simultaneously, reducing the effect of multipath caused by the obstacles was the main target of researchers in wireless communication systems for spectral efficiency enhancement. Jack Winter, at Bell laboratories, developed the first MIMO system; where it was a start point for using more than one antenna in wireless communications [9][10][11][12][13]. Later in 1993, T. Kailath and A. Paulraj proposed the spatial diversity principle [14].…”

Section: Introductionmentioning

confidence: 99%

Noise Reduction in HIPERLAN/2 System Integrated with Alamouti Technique

Yahya¹

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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HIPERLAN/2 system integrated with Alamouti technique is presented, where multiple input multiple output system including space time diversity have been employed into HIPERLAN/2 system. This method, noise reduction is applied when the transmitted antennas are closely located to the receive antennas, and they are working in a full-mode duplexing. Several factors for testing the performance of the modified system such as changing the modulation scheme and the feedback accuracy have been considered, the system performance was tested in terms of bit error rate (BER) and the signal to noise ratio (SNR). MATLAB and Simulink are used for simulating and evaluating the suggested system. the performance of the suggested system is mainly depending on the feedback mismatch amount. The modified system performance enhances as the feedback accuracy increases.

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A simple self-interference cancellation technique for full duplex communication

Cited by 4 publications

References 11 publications

Integrated Antenna Technique for Cancelling the Self-Interference Signal in Full-Duplex Communication

Integrated Antenna Technique for Cancelling the Self-Interference Signal in Full-Duplex Communication

Self Interference Cancellation in Co-Time-Co-Frequency Full Duplex Cellular Communication

Noise Reduction in HIPERLAN/2 System Integrated with Alamouti Technique

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