A Time-Approximation Filter for Direct RF Transmitter
This article presents a highly programmable time-approximation filter (TAF) that can be embedded in a direct RF transmitter architecture. The proposed filter technique approximates the impulse response of a finite impulse response (FIR) filter with a modulated LO waveform, leading to an equivalent R...
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| Veröffentlicht in: | IEEE journal of solid-state circuits 2021-07, Vol.56 (7), p.2018-2028 |
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| container_end_page | 2028 |
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| container_issue | 7 |
| container_start_page | 2018 |
| container_title | IEEE journal of solid-state circuits |
| container_volume | 56 |
| creator | Su, Shiyu Chen, Mike Shuo-Wei |
| description | This article presents a highly programmable time-approximation filter (TAF) that can be embedded in a direct RF transmitter architecture. The proposed filter technique approximates the impulse response of a finite impulse response (FIR) filter with a modulated LO waveform, leading to an equivalent RF bandpass filtering during the frequency up-conversion process. The silicon prototype in 65-nm CMOS achieves an error vector magnitude (EVM) performance of −42 dB for a 20-MHz, 256-QAM signal and −43 dB for a 10-MHz, 1024-QAM signal at 2.4 GHz. Due to TAF, the out-of-band noise floor achieves −158 dBc/Hz at a 100-MHz frequency offset. |
| doi_str_mv | 10.1109/JSSC.2020.3036342 |
| format | Article |
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Due to TAF, the out-of-band noise floor achieves −158 dBc/Hz at a 100-MHz frequency offset.</description><subject>Approximation</subject><subject>Attenuation</subject><subject>Bandpass filters</subject><subject>Baseband</subject><subject>CMOS</subject><subject>Delta-sigma modulator</subject><subject>direct RF transmitter</subject><subject>Finite impulse response filters</subject><subject>FIR filters</subject><subject>hybrid digital-to-analog converter (DAC)</subject><subject>Mathematical analysis</subject><subject>Radio frequency</subject><subject>Receivers</subject><subject>time approximation</subject><subject>time interleaving</subject><subject>Transmitters</subject><subject>tunable filter</subject><subject>Waveforms</subject><subject>Wideband</subject><issn>0018-9200</issn><issn>1558-173X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kNtKw0AQhhdRsFYfQLwJeJ06s6cklyUaDxQEW8G7ZZPOwpa2qbsp6Nu7pUXmYhjm_-fwMXaLMEGE6uFtPq8nHDhMBAgtJD9jI1SqzLEQX-dsBIBlXnGAS3YV4yqVUpY4YmqaLfyG8uluF_ofv7GD77dZ49cDhcz1IXv0gboh-2iyRbDbuPFD6lyzC2fXkW5Oecw-m6dF_ZLP3p9f6-ks74TQQ07kqiUQqKUtUGuEQnUoXNdSJaUjcLxQbVU4cEsE3kprAXQpQLfKyhRizO6Pc9Nx33uKg1n1-7BNKw1XUuuK6xKTCo-qLvQxBnJmF9In4dcgmAMdc6BjDnTMiU7y3B09noj-9Wle4qLFHyGzXyg</recordid><startdate>20210701</startdate><enddate>20210701</enddate><creator>Su, Shiyu</creator><creator>Chen, Mike Shuo-Wei</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Approximation Attenuation Bandpass filters Baseband CMOS Delta-sigma modulator direct RF transmitter Finite impulse response filters FIR filters hybrid digital-to-analog converter (DAC) Mathematical analysis Radio frequency Receivers time approximation time interleaving Transmitters tunable filter Waveforms Wideband |
| title | A Time-Approximation Filter for Direct RF Transmitter |
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