Multilevel QAM demodulator VLSI with wideband carrier recovery and dual equalizing mode

被引：17

作者：

Yamanaka, K

Takeuchi, S

Murakami, S

Koyama, M

Ido, J

Fujiwara, T

Hirano, S

Okada, K

Sumi, T

机构：

[1] System LSI Laboratory, Mitsubishi Electric Corp., Itami, Hyogo

[2] Osaka Prefecture University, Osaka

[3] LSI Laboratory, Mitsubishi Electric Corporation, Itami

[4] System LSI Laboratory, Mitsubishi Electric Corporation, Itami

[5] Inst. Electronics, Info. Commun. E.

[6] Nagaoka University of Technology, Nagaoka

[7] Kyoto University, Kyoto

[8] University of California, Los Angeles, CA

[9] Osaka University, Osaka

[10] Matsushita Electric Corporation, Moriguchi

[11] Custom LSI Designing Center, Mitsubishi Electric Corporation, Kamakura

[12] Inst. Electronics, Info. Commun. E., Inst. Television Engineers of Japan

[13] Kyoto Institute of Technology, Kyoto

[14] Doshisha University, Kyoto

[15] Utah State University, Logan, UT

[16] System LSI Laboratory, Mitsubishi Electric Corporation

[17] Kita-Itami Works, Mitsubishi Electric Corporation, Itami

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1997年 / 32卷 / 07期

关键词：

equalizers; large-scale integration; phase detection; quadrature amplitude modulation; wire communication;

D O I：

10.1109/4.597300

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 16-/64-/256-quadrature amplitude modulation (QAM) demodulator LSI with an all-digital carrier-recovery loop including a novel phase detector and a fractionally/symbol-spaced equalizer is described. The phase detector, which decides the transmitted symbol from received signal power, detects phase errors up to +/-45 degrees and enables the loop to internally eliminate the +/-80 kHz carrier-frequency offset. The fractionally spaced equalizer is implemented at the same clock rate as the symbol-spaced equalizer by increasing only mnltiplexers and flip-flops, though the former theoretically requires an operation twice as fast as the latter. A large scale integrator (LSI) operating at a symbol rate up to 8 MBaud is successfully implemented. The 0.5-mu m CMOS three-metal technology is used to implement 880 000 transistors in a die size of 12.87 x 12.49 mm(2).

引用

页码：1101 / 1107

页数：7

共 13 条

[1] Multilevel QAM demodulator VLSI with wideband carrier recovery and dual equalizing mode
Mitsubishi Electric Corp, Hyogo, Japan
IEEE J Solid State Circuits, 7 (1101-1107):
[2] VLSI implementation of timing recovery and carrier recovery for QAM/VSB dual mode
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[3] A wideband carrier-recovery system for multilevel QAM signals
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[4] Area-efficient VLSI architecture of joint carrier recovery and blind equalization for QAM demodulator
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[5] Design of carrier recovery for QAM/VSB dual mode
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[8] VLSI Implementations of Carrier Phase Recovery Algorithms for M-QAM Fiber-Optic Systems
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[10] Dual mode AVMA for blind equalization and carrier phase recovery in distorted communication channels
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