An 802.11ax 4 x 4 High-Efficiency WLAN AP Transceiver SoC Supporting 1024-QAM With Frequency-Dependent IQ Calibration and Integrated Interference Analyzer

被引：16

作者：

Kawai, Shusuke ^{[1
]}

Ito, Rui ^{[2
]}

Nakata, Kengo ^{[2
]}

Shimizu, Yutaka ^{[2
]}

Nagata, Motoki ^{[2
]}

Takeuchi, Tomohiko ^{[2
]}

Kobayashi, Hiroyuki ^{[2
]}

Ikeuchi, Katsuyuki ^{[1
]}

Kato, Takayuki ^{[1
]}

Hagiwara, Yosuke ^{[2
]}

Fujimura, Yuki ^{[2
]}

Yoshioka, Kentaro ^{[1
]}

Saigusa, Shigehito ^{[2
]}

Yoshida, Hiroshi ^{[1
]}

Arai, Makoto ^{[1
]}

Yamagishi, Toshiyuki ^{[2
]}

Kajihara, Hirotsugu ^{[2
]}

Horiuchi, Kazuhisa ^{[2
]}

Yamada, Hideki ^{[2
]}

Suzuki, Tomoya ^{[2
]}

Ando, Yuki ^{[2
]}

Nakanishi, Kensuke ^{[1
]}

Ban, Koichiro ^{[1
]}

Sekiya, Masahiro ^{[1
]}

Egashira, Yoshimasa ^{[1
]}

Aoki, Tsuguhide ^{[1
]}

Onizuka, Kohei ^{[1
]}

Mitomo, Toshiya ^{[1
]}

机构：

[1] Toshiba Co Ltd, Kawasaki, Kanagawa 2128580, Japan

[2] Toshiba Memory Corp, Yokohama, Kanagawa 2478585, Japan

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2018年 / 53卷 / 12期

关键词：

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

D O I：

10.1109/JSSC.2018.2877168

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A fully integrated 4 x 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.

引用

页码：3688 / 3699

页数：12