Tunable Duplexers: Downlink Band Isolation Requirements for LTE User Equipment
Tunable duplexers based on self-interference cancellation present a promising alternative to fixed-frequency duplexers (e.g., surface acoustic wave devices), however the level of transmit-to-receive (Tx-Rx) isolation they provide is typically lower compared to acoustic devices. This letter quantifie...
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| Veröffentlicht in: | IEEE wireless communications letters 2019-10, Vol.8 (5), p.1349-1352 |
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| creator | Laughlin, Leo Zhang, Chunqing Beach, Mark A. Morris, Kevin A. Haine, John L. |
| description | Tunable duplexers based on self-interference cancellation present a promising alternative to fixed-frequency duplexers (e.g., surface acoustic wave devices), however the level of transmit-to-receive (Tx-Rx) isolation they provide is typically lower compared to acoustic devices. This letter quantifies the impact of reduced isolation on receiver (Rx) noise figure (NF), and determines minimum isolation requirements for Tx-Rx isolation in cellular handset transceivers. Measurements of Tx noise power spectral density from a cellular handset power amplifier are combined with theoretical analysis and long term evolution (LTE) downlink throughput simulations to assess the impact of isolation on the NF and sensitivity. Although lower duplexer isolation can lead to substantial desensitization for some duplex separation/bandwidth combinations, achieving LTE compliant sensitivity requires only 38 dB of isolation in the Rx band. LTE sensitivity specification compliance is therefore readily achievable with current tunable duplexing technologies. |
| doi_str_mv | 10.1109/LWC.2019.2917441 |
| format | Article |
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This letter quantifies the impact of reduced isolation on receiver (Rx) noise figure (NF), and determines minimum isolation requirements for Tx-Rx isolation in cellular handset transceivers. Measurements of Tx noise power spectral density from a cellular handset power amplifier are combined with theoretical analysis and long term evolution (LTE) downlink throughput simulations to assess the impact of isolation on the NF and sensitivity. Although lower duplexer isolation can lead to substantial desensitization for some duplex separation/bandwidth combinations, achieving LTE compliant sensitivity requires only 38 dB of isolation in the Rx band. LTE sensitivity specification compliance is therefore readily achievable with current tunable duplexing technologies.</description><identifier>ISSN: 2162-2337</identifier><identifier>EISSN: 2162-2345</identifier><identifier>DOI: 10.1109/LWC.2019.2917441</identifier><identifier>CODEN: IWCLAF</identifier><language>eng</language><publisher>Piscataway: IEEE</publisher><subject>Acoustic noise ; Bandwidths ; Desensitization ; Downlink ; Duplexers ; electrical balance duplexer ; frequency division duplex ; Full duplex ; Long Term Evolution ; LTE ; Mobile communication systems ; noise ; Noise measurement ; Power amplifiers ; Power spectral density ; Receiving antennas ; self-interference cancellation ; Sensitivity analysis ; Surface acoustic wave devices ; Surface acoustic waves ; Telephone sets ; Transceivers ; Uplink ; Wireless communications</subject><ispartof>IEEE wireless communications letters, 2019-10, Vol.8 (5), p.1349-1352</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c333t-afda0c5b34ecadefbd47f89174d8ef396132d8bd1c61175d00bea2abb52b2a0c3</citedby><cites>FETCH-LOGICAL-c333t-afda0c5b34ecadefbd47f89174d8ef396132d8bd1c61175d00bea2abb52b2a0c3</cites><orcidid>0000-0002-6798-7001 ; 0000-0002-3187-6166 ; 0000-0002-7355-1095 ; 0000-0002-5164-7221</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8717695$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27901,27902,54733</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8717695$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Laughlin, Leo</creatorcontrib><creatorcontrib>Zhang, Chunqing</creatorcontrib><creatorcontrib>Beach, Mark A.</creatorcontrib><creatorcontrib>Morris, Kevin A.</creatorcontrib><creatorcontrib>Haine, John L.</creatorcontrib><title>Tunable Duplexers: Downlink Band Isolation Requirements for LTE User Equipment</title><title>IEEE wireless communications letters</title><addtitle>LWC</addtitle><description>Tunable duplexers based on self-interference cancellation present a promising alternative to fixed-frequency duplexers (e.g., surface acoustic wave devices), however the level of transmit-to-receive (Tx-Rx) isolation they provide is typically lower compared to acoustic devices. This letter quantifies the impact of reduced isolation on receiver (Rx) noise figure (NF), and determines minimum isolation requirements for Tx-Rx isolation in cellular handset transceivers. Measurements of Tx noise power spectral density from a cellular handset power amplifier are combined with theoretical analysis and long term evolution (LTE) downlink throughput simulations to assess the impact of isolation on the NF and sensitivity. Although lower duplexer isolation can lead to substantial desensitization for some duplex separation/bandwidth combinations, achieving LTE compliant sensitivity requires only 38 dB of isolation in the Rx band. LTE sensitivity specification compliance is therefore readily achievable with current tunable duplexing technologies.</description><subject>Acoustic noise</subject><subject>Bandwidths</subject><subject>Desensitization</subject><subject>Downlink</subject><subject>Duplexers</subject><subject>electrical balance duplexer</subject><subject>frequency division duplex</subject><subject>Full duplex</subject><subject>Long Term Evolution</subject><subject>LTE</subject><subject>Mobile communication systems</subject><subject>noise</subject><subject>Noise measurement</subject><subject>Power amplifiers</subject><subject>Power spectral density</subject><subject>Receiving antennas</subject><subject>self-interference cancellation</subject><subject>Sensitivity analysis</subject><subject>Surface acoustic wave devices</subject><subject>Surface acoustic waves</subject><subject>Telephone sets</subject><subject>Transceivers</subject><subject>Uplink</subject><subject>Wireless communications</subject><issn>2162-2337</issn><issn>2162-2345</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kN9LwzAQx4MoOObeBV8CPnfmkv70Tbepg6IgGz6GpLlAZ9d2SYv639uysXu54-77vTs-hNwCmwOw7CH_Wsw5g2zOM0jCEC7IhEPMAy7C6PJci-SazLzfsSFiBhzSCXnf9LXSFdJl31b4i84_0mXzU1dl_U2fVW3o2jeV6sqmpp946EuHe6w7T23jaL5Z0a1HR1fDoB37N-TKqsrj7JSnZPuy2izegvzjdb14yoNCCNEFyhrFikiLEAtl0GoTJjYdfzcpWpHFILhJtYEiBkgiw5hGxZXWEdd8cIopuT_ubV1z6NF3ctf0rh5OSi5YFAtIeDyo2FFVuMZ7h1a2rtwr9yeByRGcHMDJEZw8gRssd0dLiYhneZpAEmeR-Aepa2mz</recordid><startdate>20191001</startdate><enddate>20191001</enddate><creator>Laughlin, Leo</creator><creator>Zhang, Chunqing</creator><creator>Beach, Mark A.</creator><creator>Morris, Kevin A.</creator><creator>Haine, John L.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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This letter quantifies the impact of reduced isolation on receiver (Rx) noise figure (NF), and determines minimum isolation requirements for Tx-Rx isolation in cellular handset transceivers. Measurements of Tx noise power spectral density from a cellular handset power amplifier are combined with theoretical analysis and long term evolution (LTE) downlink throughput simulations to assess the impact of isolation on the NF and sensitivity. Although lower duplexer isolation can lead to substantial desensitization for some duplex separation/bandwidth combinations, achieving LTE compliant sensitivity requires only 38 dB of isolation in the Rx band. 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| source | IEEE Electronic Library (IEL) |
| subjects | Acoustic noise Bandwidths Desensitization Downlink Duplexers electrical balance duplexer frequency division duplex Full duplex Long Term Evolution LTE Mobile communication systems noise Noise measurement Power amplifiers Power spectral density Receiving antennas self-interference cancellation Sensitivity analysis Surface acoustic wave devices Surface acoustic waves Telephone sets Transceivers Uplink Wireless communications |
| title | Tunable Duplexers: Downlink Band Isolation Requirements for LTE User Equipment |
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