Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology
In-band full-duplex (IBFD) systems can double the spectral efficiency by enabling simultaneous transmission and reception within the same band. Key to realizing full-duplex radios is the cancellation of the self-interference (SI) that couples from the transmitting antenna into the receiving path. Th...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9968230/ |
| _version_ | 1811178305033863168 |
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| author | Md Nurul A. Tarek Elias A. Alwan |
| author_facet | Md Nurul A. Tarek Elias A. Alwan |
| author_sort | Md Nurul A. Tarek |
| collection | DOAJ |
| description | In-band full-duplex (IBFD) systems can double the spectral efficiency by enabling simultaneous transmission and reception within the same band. Key to realizing full-duplex radios is the cancellation of the self-interference (SI) that couples from the transmitting antenna into the receiving path. This is done by introducing a self-interference cancellations (SIC) circuit to significantly reduce the coupled transmit signal and avoid receiver’s desensitization. Additionally, SI suppression becomes more challenging across broader bandwidths. This paper presents a novel, wideband, and low profile SIC circuit based on a hybrid Finite Impulse Response (FIR) and resonator filter topology. The latter is optimized to provide an average of 22dB cancellation across 800MHz in the L-band. Conventional, SIC circuits require a filter bank with at least two FIR filters to achieve such a wide bandwidth. Conversely, our FIR resonator design is low profile with a circuit size nearly half of that of a filter bank. Simulations show a minimum cancellation of 15dB and a maximum cancellation of 45dB. A prototype was fabricated and tested, showing an average of <inline-formula> <tex-math notation="LaTeX">$\sim ~20$ </tex-math></inline-formula>dB cancellation which is in good agreement with our simulation. Further, measured results show a minimum cancellation of 15dB and maximum cancellation of 27dB. |
| first_indexed | 2024-04-11T06:17:26Z |
| format | Article |
| id | doaj.art-65187b9fef544eb48de2b98847ab0546 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-11T06:17:26Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-65187b9fef544eb48de2b98847ab05462022-12-22T04:41:01ZengIEEEIEEE Access2169-35362022-01-011012650812651510.1109/ACCESS.2022.32262039968230Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator TopologyMd Nurul A. Tarek0https://orcid.org/0000-0002-7105-0983Elias A. Alwan1https://orcid.org/0000-0002-6011-0207Department of Electrical and Computer Engineering, Florida International University, Miami, FL, USADepartment of Electrical and Computer Engineering, Florida International University, Miami, FL, USAIn-band full-duplex (IBFD) systems can double the spectral efficiency by enabling simultaneous transmission and reception within the same band. Key to realizing full-duplex radios is the cancellation of the self-interference (SI) that couples from the transmitting antenna into the receiving path. This is done by introducing a self-interference cancellations (SIC) circuit to significantly reduce the coupled transmit signal and avoid receiver’s desensitization. Additionally, SI suppression becomes more challenging across broader bandwidths. This paper presents a novel, wideband, and low profile SIC circuit based on a hybrid Finite Impulse Response (FIR) and resonator filter topology. The latter is optimized to provide an average of 22dB cancellation across 800MHz in the L-band. Conventional, SIC circuits require a filter bank with at least two FIR filters to achieve such a wide bandwidth. Conversely, our FIR resonator design is low profile with a circuit size nearly half of that of a filter bank. Simulations show a minimum cancellation of 15dB and a maximum cancellation of 45dB. A prototype was fabricated and tested, showing an average of <inline-formula> <tex-math notation="LaTeX">$\sim ~20$ </tex-math></inline-formula>dB cancellation which is in good agreement with our simulation. Further, measured results show a minimum cancellation of 15dB and maximum cancellation of 27dB.https://ieeexplore.ieee.org/document/9968230/Coupling signalin-band full duplexsimultaneous transmit and receiveself-interference cancellation |
| spellingShingle | Md Nurul A. Tarek Elias A. Alwan Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology IEEE Access Coupling signal in-band full duplex simultaneous transmit and receive self-interference cancellation |
| title | Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology |
| title_full | Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology |
| title_fullStr | Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology |
| title_full_unstemmed | Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology |
| title_short | Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology |
| title_sort | wideband low profile coupling suppression circuit for simultaneous transmit and receive system based on hybrid finite impulse response and resonator topology |
| topic | Coupling signal in-band full duplex simultaneous transmit and receive self-interference cancellation |
| url | https://ieeexplore.ieee.org/document/9968230/ |
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