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

Shusuke Kawai; Rui Ito; Kengo Nakata; Yutaka Shimizu; Motoki Nagata; Tomohiko Takeuchi; Hiroyuki Kobayashi; Katsuyuki Ikeuchi; Takayuki Kato; Yosuke Hagiwara; Yuki Fujimura; Kentaro Yoshioka; Shigehito Saigusa; Hiroshi Yoshida; Makoto Arai; Toshiyuki Yamagishi; Hirotsugu Kajihara; Kazuhisa Horiuchi; Hideki Yamada; Tomoya Suzuki; Yuki Ando; Kensuke Nakanishi; Koichiro Ban; Masahiro Sekiya; Yoshimasa Egashira; Tsuguhide Aoki; Kohei Onizuka; Toshiya Mitomo

doi:10.1109/JSSC.2018.2877168

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

Shusuke Kawai, Rui Ito, Kengo Nakata, Yutaka Shimizu, Motoki Nagata, Tomohiko Takeuchi, Hiroyuki Kobayashi, Katsuyuki Ikeuchi, Takayuki Kato, Yosuke Hagiwara, Yuki Fujimura, Kentaro Yoshioka, Shigehito Saigusa, Hiroshi Yoshida, Makoto Arai, Toshiyuki Yamagishi, Hirotsugu Kajihara, Kazuhisa Horiuchi, Hideki Yamada, Tomoya SuzukiYuki Ando, Kensuke Nakanishi, Koichiro Ban, Masahiro Sekiya, Yoshimasa Egashira, Tsuguhide Aoki, Kohei Onizuka, Toshiya Mitomo

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

A fully integrated 4 × 4 802.11abgn/ac/ax transceiver system-on-chip (SoC) with integrated interference analyzer and frequency-dependent in-phase and quadrature (IQ) (FD-IQ) calibration is presented. The FD-IQ technique helps meeting the extremely strict IQ imbalance requirement for 1-K quadratic-amplitude modulation (QAM). The pure current-mode TX baseband (BB) improves SNR to better than 50 dB, and a multi-mode local oscillator (LO) distribution circuit provides non-contiguous operation with the error vector magnitude (EVM) of less than -37 dB. The integrated interference analyzer achieves the highly reliable connection in the presence of the undesired signal and hence improves the frequency usage efficiency by identifying the wireless LAN (WLAN) and other signals in the 2G/5G band.

Original language	English
Article number	8528383
Pages (from-to)	3688-3699
Number of pages	12
Journal	IEEE Journal of Solid-State Circuits
Volume	53
Issue number	12
DOIs	https://doi.org/10.1109/JSSC.2018.2877168
Publication status	Published - 2018 Dec
Externally published	Yes

Keywords

80211ax
In-phase and quadrature (IQ) mismatch
calibration
error vector magnitude (EVM)
image rejection ratio (IRR)
wireless LAN (WLAN)

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/JSSC.2018.2877168

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Kawai, S., Ito, R., Nakata, K., Shimizu, Y., Nagata, M., Takeuchi, T., Kobayashi, H., Ikeuchi, K., Kato, T., Hagiwara, Y., Fujimura, Y., Yoshioka, K., Saigusa, S., Yoshida, H., Arai, M., Yamagishi, T., Kajihara, H., Horiuchi, K., Yamada, H., ... Mitomo, T. (2018). An 802.11ax 4 × 4 high-efficiency WLAN AP transceiver SoC supporting 1024-QAM with frequency-dependent IQ calibration and integrated interference analyzer. IEEE Journal of Solid-State Circuits, 53(12), 3688-3699. Article 8528383. https://doi.org/10.1109/JSSC.2018.2877168

Kawai, S, Ito, R, Nakata, K, Shimizu, Y, Nagata, M, Takeuchi, T, Kobayashi, H, Ikeuchi, K, Kato, T, Hagiwara, Y, Fujimura, Y, Yoshioka, K, Saigusa, S, Yoshida, H, Arai, M, Yamagishi, T, Kajihara, H, Horiuchi, K, Yamada, H, Suzuki, T, Ando, Y, Nakanishi, K, Ban, K, Sekiya, M, Egashira, Y, Aoki, T, Onizuka, K & Mitomo, T 2018, 'An 802.11ax 4 × 4 high-efficiency WLAN AP transceiver SoC supporting 1024-QAM with frequency-dependent IQ calibration and integrated interference analyzer', IEEE Journal of Solid-State Circuits, vol. 53, no. 12, 8528383, pp. 3688-3699. https://doi.org/10.1109/JSSC.2018.2877168

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abstract = "A fully integrated 4 × 4 802.11abgn/ac/ax transceiver system-on-chip (SoC) with integrated interference analyzer and frequency-dependent in-phase and quadrature (IQ) (FD-IQ) calibration is presented. The FD-IQ technique helps meeting the extremely strict IQ imbalance requirement for 1-K quadratic-amplitude modulation (QAM). The pure current-mode TX baseband (BB) improves SNR to better than 50 dB, and a multi-mode local oscillator (LO) distribution circuit provides non-contiguous operation with the error vector magnitude (EVM) of less than -37 dB. The integrated interference analyzer achieves the highly reliable connection in the presence of the undesired signal and hence improves the frequency usage efficiency by identifying the wireless LAN (WLAN) and other signals in the 2G/5G band.",

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AU - Nakata, Kengo

AU - Shimizu, Yutaka

AU - Nagata, Motoki

AU - Takeuchi, Tomohiko

AU - Kobayashi, Hiroyuki

AU - Ikeuchi, Katsuyuki

AU - Kato, Takayuki

AU - Hagiwara, Yosuke

AU - Fujimura, Yuki

AU - Yoshioka, Kentaro

AU - Saigusa, Shigehito

AU - Yoshida, Hiroshi

AU - Arai, Makoto

AU - Yamagishi, Toshiyuki

AU - Kajihara, Hirotsugu

AU - Horiuchi, Kazuhisa

AU - Yamada, Hideki

AU - Suzuki, Tomoya

AU - Ando, Yuki

AU - Nakanishi, Kensuke

AU - Ban, Koichiro

AU - Sekiya, Masahiro

AU - Egashira, Yoshimasa

AU - Aoki, Tsuguhide

AU - Onizuka, Kohei

AU - Mitomo, Toshiya

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N2 - A fully integrated 4 × 4 802.11abgn/ac/ax transceiver system-on-chip (SoC) with integrated interference analyzer and frequency-dependent in-phase and quadrature (IQ) (FD-IQ) calibration is presented. The FD-IQ technique helps meeting the extremely strict IQ imbalance requirement for 1-K quadratic-amplitude modulation (QAM). The pure current-mode TX baseband (BB) improves SNR to better than 50 dB, and a multi-mode local oscillator (LO) distribution circuit provides non-contiguous operation with the error vector magnitude (EVM) of less than -37 dB. The integrated interference analyzer achieves the highly reliable connection in the presence of the undesired signal and hence improves the frequency usage efficiency by identifying the wireless LAN (WLAN) and other signals in the 2G/5G band.

AB - A fully integrated 4 × 4 802.11abgn/ac/ax transceiver system-on-chip (SoC) with integrated interference analyzer and frequency-dependent in-phase and quadrature (IQ) (FD-IQ) calibration is presented. The FD-IQ technique helps meeting the extremely strict IQ imbalance requirement for 1-K quadratic-amplitude modulation (QAM). The pure current-mode TX baseband (BB) improves SNR to better than 50 dB, and a multi-mode local oscillator (LO) distribution circuit provides non-contiguous operation with the error vector magnitude (EVM) of less than -37 dB. The integrated interference analyzer achieves the highly reliable connection in the presence of the undesired signal and hence improves the frequency usage efficiency by identifying the wireless LAN (WLAN) and other signals in the 2G/5G band.

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KW - image rejection ratio (IRR)

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

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Keywords

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