IEICE TRANSACTIONS on Electronics
Reducing Spurious Output of Balanced Modulators by Dynamic Matching of I, Q Quadrature Paths
Summary :
This paper presents a technique for reducing spurious output of balanced modulators used in transmitters and arbitrary waveform generators. Two-step upconversion is a convenient way to produce a desired single-sideband (SSB) radio-frequency (RF) signal--baseband quadrature I and Q signals (which are analog outputs of direct digital frequency synthesizers) are upconverted by mixers and local oscillators (LOs)--but mismatches between the DACs in I and Q paths cause spurious output. We propose a method of dynamically matching the I and Q paths by multiplexing two DACs between I and Q paths in a pseudo-random manner. MATLAB simulation shows that multiplexing the two DACs spreads the spurious output, caused by mismatches between the two DACs, in the frequency domain, and reduces the peak level of spurious signals.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E88-C No.6 pp.1290-1294
- Publication Date
- 2005/06/01
- Publicized
- Online ISSN
- DOI
- 10.1093/ietele/e88-c.6.1290
- Type of Manuscript
- Special Section LETTER (Special Section on Analog Circuit and Device Technologies)
- Category
- AD/DA
Authors
Keyword
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Jun OTSUKI, Hao SAN, Haruo KOBAYASHI, Takanori KOMURO, Yoshihisa YAMADA, Aiyan LIU, "Reducing Spurious Output of Balanced Modulators by Dynamic Matching of I, Q Quadrature Paths" in IEICE TRANSACTIONS on Electronics,
vol. E88-C, no. 6, pp. 1290-1294, June 2005, doi: 10.1093/ietele/e88-c.6.1290.
Abstract: This paper presents a technique for reducing spurious output of balanced modulators used in transmitters and arbitrary waveform generators. Two-step upconversion is a convenient way to produce a desired single-sideband (SSB) radio-frequency (RF) signal--baseband quadrature I and Q signals (which are analog outputs of direct digital frequency synthesizers) are upconverted by mixers and local oscillators (LOs)--but mismatches between the DACs in I and Q paths cause spurious output. We propose a method of dynamically matching the I and Q paths by multiplexing two DACs between I and Q paths in a pseudo-random manner. MATLAB simulation shows that multiplexing the two DACs spreads the spurious output, caused by mismatches between the two DACs, in the frequency domain, and reduces the peak level of spurious signals.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e88-c.6.1290/_p
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@ARTICLE{e88-c_6_1290,
author={Jun OTSUKI, Hao SAN, Haruo KOBAYASHI, Takanori KOMURO, Yoshihisa YAMADA, Aiyan LIU, },
journal={IEICE TRANSACTIONS on Electronics},
title={Reducing Spurious Output of Balanced Modulators by Dynamic Matching of I, Q Quadrature Paths},
year={2005},
volume={E88-C},
number={6},
pages={1290-1294},
abstract={This paper presents a technique for reducing spurious output of balanced modulators used in transmitters and arbitrary waveform generators. Two-step upconversion is a convenient way to produce a desired single-sideband (SSB) radio-frequency (RF) signal--baseband quadrature I and Q signals (which are analog outputs of direct digital frequency synthesizers) are upconverted by mixers and local oscillators (LOs)--but mismatches between the DACs in I and Q paths cause spurious output. We propose a method of dynamically matching the I and Q paths by multiplexing two DACs between I and Q paths in a pseudo-random manner. MATLAB simulation shows that multiplexing the two DACs spreads the spurious output, caused by mismatches between the two DACs, in the frequency domain, and reduces the peak level of spurious signals.},
keywords={},
doi={10.1093/ietele/e88-c.6.1290},
ISSN={},
month={June},}
Copy
TY - JOUR
TI - Reducing Spurious Output of Balanced Modulators by Dynamic Matching of I, Q Quadrature Paths
T2 - IEICE TRANSACTIONS on Electronics
SP - 1290
EP - 1294
AU - Jun OTSUKI
AU - Hao SAN
AU - Haruo KOBAYASHI
AU - Takanori KOMURO
AU - Yoshihisa YAMADA
AU - Aiyan LIU
PY - 2005
DO - 10.1093/ietele/e88-c.6.1290
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E88-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2005
AB - This paper presents a technique for reducing spurious output of balanced modulators used in transmitters and arbitrary waveform generators. Two-step upconversion is a convenient way to produce a desired single-sideband (SSB) radio-frequency (RF) signal--baseband quadrature I and Q signals (which are analog outputs of direct digital frequency synthesizers) are upconverted by mixers and local oscillators (LOs)--but mismatches between the DACs in I and Q paths cause spurious output. We propose a method of dynamically matching the I and Q paths by multiplexing two DACs between I and Q paths in a pseudo-random manner. MATLAB simulation shows that multiplexing the two DACs spreads the spurious output, caused by mismatches between the two DACs, in the frequency domain, and reduces the peak level of spurious signals.
ER -
English
