An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer

Shusuke Kawai; Hiromitsu Aoyama; Rui Ito; Yutaka Shimizu; Mitsuyuki Ashida; Asuka Maki; Tomohiko Takeuchi; Hiroyuki Kobayashi; Go Urakawa; Hiroaki Hoshino; Shigehito Saigusa; Kazushi Koyama; Makoto Morita; Ryuichi Nihei; Daisuke Goto; Motoki Nagata; Kengo Nakata; Katsuyuki Ikeuchi; Kentaro Yoshioka; Ryoichi Tachibana; Makoto Arai; Chen Kong Teh; Atsushi Suzuki; Hiroshi Yoshida; Yosuke Hagiwara; Takayuki Kato; Ichiro Seto; Tomoya Horiguchi; Koichiro Ban; Kyosuke Takahashi; Hirotsugu Kajihara; Toshiyuki Yamagishi; Yuki Fujimura; Kazuhisa Horiuchi; Katsuya Nonin; Kengo Kurose; Hideki Yamada; Kentaro Taniguchi; Masahiro Sekiya; Takeshi Tomizawa; Daisuke Taki; Masaaki Ikuta; Tomoya Suzuki; Yuki Ando; Daisuke Yashima; Takahisa Kaihotsu; Hiroki Mori; Kensuke Nakanishi; Takeshi Kumagaya; Yasuo Unekawa; Tsuguhide Aoki; Kohei Onizuka; Toshiya Mitomo

doi:10.1109/ISSCC.2018.8310374

An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer

Shusuke Kawai, Hiromitsu Aoyama, Rui Ito, Yutaka Shimizu, Mitsuyuki Ashida, Asuka Maki, Tomohiko Takeuchi, Hiroyuki Kobayashi, Go Urakawa, Hiroaki Hoshino, Shigehito Saigusa, Kazushi Koyama, Makoto Morita, Ryuichi Nihei, Daisuke Goto, Motoki Nagata, Kengo Nakata, Katsuyuki Ikeuchi, Kentaro Yoshioka, Ryoichi TachibanaMakoto Arai, Chen Kong Teh, Atsushi Suzuki, Hiroshi Yoshida, Yosuke Hagiwara, Takayuki Kato, Ichiro Seto, Tomoya Horiguchi, Koichiro Ban, Kyosuke Takahashi, Hirotsugu Kajihara, Toshiyuki Yamagishi, Yuki Fujimura, Kazuhisa Horiuchi, Katsuya Nonin, Kengo Kurose, Hideki Yamada, Kentaro Taniguchi, Masahiro Sekiya, Takeshi Tomizawa, Daisuke Taki, Masaaki Ikuta, Tomoya Suzuki, Yuki Ando, Daisuke Yashima, Takahisa Kaihotsu, Hiroki Mori, Kensuke Nakanishi, Takeshi Kumagaya, Yasuo Unekawa, Tsuguhide Aoki, Kohei Onizuka, Toshiya Mitomo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Citations (Scopus)

Abstract

An exponentially Increasing number of wireless-LAN (WLAN) devices In a dense environment causes a decrease in throughput owing to collisions among the devices and the lack of contiguous bandwidth. The next-generation standard of 802.11ax improves spectrum efficiency by additionally supporting 1024 (1K) QAM, OFDMA with 80+80MHz; these impose several challenges to silicon design. 1K-QAM demands extreme IQ balance with an IRR better than -50dB over a wide frequency range up to 80MHz to achieve at least -35dB RX EVM or less. Noise characteristics better than -44dBc LO integrated phase noise as well as 50dB isolation between each TRX chain are mandatory. To best make use of the essential features defined in the 11ax standard, a real-time and arbitrary spectrum-resource control capability at each access point (AP) is beneficial both in terms of further improvement in spectrum efficiency as well as communication reliability in ISM coexisting bands and legacy WLAN. Interference identification of the order of 10μϵ while incorporating everything into a strictly limited silicon area is key to launching the advanced unique functionality. This paper presents a fully integrated 4×4 802.11abgn/ac/ax-compliant AP transceiver SoC. The chip offers frequency-dependent IQ (FD-IQ) mismatch calibration for both amplitude and phase, low-noise TX BB and multimode LO distribution techniques, and real-time interference detection including 2.4GHz inverter-type microwave (MW) ovens.

Original language	English
Title of host publication	2018 IEEE International Solid-State Circuits Conference, ISSCC 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	442-444
Number of pages	3
ISBN (Electronic)	9781509049394
DOIs	https://doi.org/10.1109/ISSCC.2018.8310374
Publication status	Published - 2018 Mar 8
Externally published	Yes
Event	65th IEEE International Solid-State Circuits Conference, ISSCC 2018 - San Francisco, United States Duration: 2018 Feb 11 → 2018 Feb 15

Publication series

Name	Digest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume	61
ISSN (Print)	0193-6530

Other

Other	65th IEEE International Solid-State Circuits Conference, ISSCC 2018
Country/Territory	United States
City	San Francisco
Period	18/2/11 → 18/2/15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/ISSCC.2018.8310374

Cite this

Kawai, S., Aoyama, H., Ito, R., Shimizu, Y., Ashida, M., Maki, A., Takeuchi, T., Kobayashi, H., Urakawa, G., Hoshino, H., Saigusa, S., Koyama, K., Morita, M., Nihei, R., Goto, D., Nagata, M., Nakata, K., Ikeuchi, K., Yoshioka, K., ... Mitomo, T. (2018). An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer. In 2018 IEEE International Solid-State Circuits Conference, ISSCC 2018 (pp. 442-444). (Digest of Technical Papers - IEEE International Solid-State Circuits Conference; Vol. 61). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISSCC.2018.8310374

An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer. / Kawai, Shusuke; Aoyama, Hiromitsu; Ito, Rui et al.
2018 IEEE International Solid-State Circuits Conference, ISSCC 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 442-444 (Digest of Technical Papers - IEEE International Solid-State Circuits Conference; Vol. 61).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kawai, S, Aoyama, H, Ito, R, Shimizu, Y, Ashida, M, Maki, A, Takeuchi, T, Kobayashi, H, Urakawa, G, Hoshino, H, Saigusa, S, Koyama, K, Morita, M, Nihei, R, Goto, D, Nagata, M, Nakata, K, Ikeuchi, K, Yoshioka, K, Tachibana, R, Arai, M, Teh, CK, Suzuki, A, Yoshida, H, Hagiwara, Y, Kato, T, Seto, I, Horiguchi, T, Ban, K, Takahashi, K, Kajihara, H, Yamagishi, T, Fujimura, Y, Horiuchi, K, Nonin, K, Kurose, K, Yamada, H, Taniguchi, K, Sekiya, M, Tomizawa, T, Taki, D, Ikuta, M, Suzuki, T, Ando, Y, Yashima, D, Kaihotsu, T, Mori, H, Nakanishi, K, Kumagaya, T, Unekawa, Y, Aoki, T, Onizuka, K & Mitomo, T 2018, An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer. in 2018 IEEE International Solid-State Circuits Conference, ISSCC 2018. Digest of Technical Papers - IEEE International Solid-State Circuits Conference, vol. 61, Institute of Electrical and Electronics Engineers Inc., pp. 442-444, 65th IEEE International Solid-State Circuits Conference, ISSCC 2018, San Francisco, United States, 18/2/11. https://doi.org/10.1109/ISSCC.2018.8310374

Kawai S, Aoyama H, Ito R, Shimizu Y, Ashida M, Maki A et al. An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer. In 2018 IEEE International Solid-State Circuits Conference, ISSCC 2018. Institute of Electrical and Electronics Engineers Inc. 2018. p. 442-444. (Digest of Technical Papers - IEEE International Solid-State Circuits Conference). doi: 10.1109/ISSCC.2018.8310374

Kawai, Shusuke ; Aoyama, Hiromitsu ; Ito, Rui et al. / An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer. 2018 IEEE International Solid-State Circuits Conference, ISSCC 2018. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 442-444 (Digest of Technical Papers - IEEE International Solid-State Circuits Conference).

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abstract = "An exponentially Increasing number of wireless-LAN (WLAN) devices In a dense environment causes a decrease in throughput owing to collisions among the devices and the lack of contiguous bandwidth. The next-generation standard of 802.11ax improves spectrum efficiency by additionally supporting 1024 (1K) QAM, OFDMA with 80+80MHz; these impose several challenges to silicon design. 1K-QAM demands extreme IQ balance with an IRR better than -50dB over a wide frequency range up to 80MHz to achieve at least -35dB RX EVM or less. Noise characteristics better than -44dBc LO integrated phase noise as well as 50dB isolation between each TRX chain are mandatory. To best make use of the essential features defined in the 11ax standard, a real-time and arbitrary spectrum-resource control capability at each access point (AP) is beneficial both in terms of further improvement in spectrum efficiency as well as communication reliability in ISM coexisting bands and legacy WLAN. Interference identification of the order of 10μϵ while incorporating everything into a strictly limited silicon area is key to launching the advanced unique functionality. This paper presents a fully integrated 4×4 802.11abgn/ac/ax-compliant AP transceiver SoC. The chip offers frequency-dependent IQ (FD-IQ) mismatch calibration for both amplitude and phase, low-noise TX BB and multimode LO distribution techniques, and real-time interference detection including 2.4GHz inverter-type microwave (MW) ovens.",

author = "Shusuke Kawai and Hiromitsu Aoyama and Rui Ito and Yutaka Shimizu and Mitsuyuki Ashida and Asuka Maki and Tomohiko Takeuchi and Hiroyuki Kobayashi and Go Urakawa and Hiroaki Hoshino and Shigehito Saigusa and Kazushi Koyama and Makoto Morita and Ryuichi Nihei and Daisuke Goto and Motoki Nagata and Kengo Nakata and Katsuyuki Ikeuchi and Kentaro Yoshioka and Ryoichi Tachibana and Makoto Arai and Teh, {Chen Kong} and Atsushi Suzuki and Hiroshi Yoshida and Yosuke Hagiwara and Takayuki Kato and Ichiro Seto and Tomoya Horiguchi and Koichiro Ban and Kyosuke Takahashi and Hirotsugu Kajihara and Toshiyuki Yamagishi and Yuki Fujimura and Kazuhisa Horiuchi and Katsuya Nonin and Kengo Kurose and Hideki Yamada and Kentaro Taniguchi and Masahiro Sekiya and Takeshi Tomizawa and Daisuke Taki and Masaaki Ikuta and Tomoya Suzuki and Yuki Ando and Daisuke Yashima and Takahisa Kaihotsu and Hiroki Mori and Kensuke Nakanishi and Takeshi Kumagaya and Yasuo Unekawa and Tsuguhide Aoki and Kohei Onizuka and Toshiya Mitomo",

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AU - Shimizu, Yutaka

AU - Ashida, Mitsuyuki

AU - Maki, Asuka

AU - Takeuchi, Tomohiko

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AU - Urakawa, Go

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AB - An exponentially Increasing number of wireless-LAN (WLAN) devices In a dense environment causes a decrease in throughput owing to collisions among the devices and the lack of contiguous bandwidth. The next-generation standard of 802.11ax improves spectrum efficiency by additionally supporting 1024 (1K) QAM, OFDMA with 80+80MHz; these impose several challenges to silicon design. 1K-QAM demands extreme IQ balance with an IRR better than -50dB over a wide frequency range up to 80MHz to achieve at least -35dB RX EVM or less. Noise characteristics better than -44dBc LO integrated phase noise as well as 50dB isolation between each TRX chain are mandatory. To best make use of the essential features defined in the 11ax standard, a real-time and arbitrary spectrum-resource control capability at each access point (AP) is beneficial both in terms of further improvement in spectrum efficiency as well as communication reliability in ISM coexisting bands and legacy WLAN. Interference identification of the order of 10μϵ while incorporating everything into a strictly limited silicon area is key to launching the advanced unique functionality. This paper presents a fully integrated 4×4 802.11abgn/ac/ax-compliant AP transceiver SoC. The chip offers frequency-dependent IQ (FD-IQ) mismatch calibration for both amplitude and phase, low-noise TX BB and multimode LO distribution techniques, and real-time interference detection including 2.4GHz inverter-type microwave (MW) ovens.

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An 802.11ax 4×4 spectrum-efficient WLAN AP transceiver SoC supporting 1024QAM with frequency-dependent IQ calibration and integrated interference analyzer

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