Youngsik Hur | Samsung Electromechanics (original) (raw)
Papers by Youngsik Hur
2007 Ieee International Symposium on Circuits and Systems, May 27, 2007
In this paper, a BiCMOS equalizer using an active delay line structure for backplane communicatio... more In this paper, a BiCMOS equalizer using an active delay line structure for backplane communication is investigated. Equalization is achieved using a finite impulse response (FIR) filter. The filter is implemented using variable gain blocks and delay elements. The variable gain function is implemented using a Gilbert cell topology, modified for high-speed application. The delay line is implemented using active
Proceedings. 45th Annual IEEE Symposium on Foundations of Computer Science, 2004
This paper demonstrates an active Near-End-Crosstalk (NEXT) noise canceller intended for use in c... more This paper demonstrates an active Near-End-Crosstalk (NEXT) noise canceller intended for use in commercial backplanes. Optimum system architecture and specifications a r e generated using measured channel data. Additionally, CMOS circuit implementation approaches a r e introduced and their performances a r e discussed. The NEXT canceller is applied to a 20Gbps 4-PAM signal over a 16-inch backplane channel and shows 75% cancellation. 0-7803-8470
2005 IEEE International Symposium on Circuits and Systems, 2005
In this paper, active filter structures in a near-end crosstalk (NEXT) noise canceller for 20Gbit... more In this paper, active filter structures in a near-end crosstalk (NEXT) noise canceller for 20Gbit/s throughput is investigated. The active filters provide tunable noise emulation circuits and comprise the primary components of an analog NEXT canceller architecture. The two topologies proposed are a pole-zero (PZ) filter and a finite impulse response (FIR) filter. The NEXT canceller is designed in a
RAWCON 99. 1999 IEEE Radio and Wireless Conference (Cat. No.99EX292), 1999
Abstract This paper reports a new simulation method using software based millimeter-wave test bed... more Abstract This paper reports a new simulation method using software based millimeter-wave test bed that has been developed to emulate a wide range of millimeter-wave communication concepts in the hardware-in-the-loop-simulations and to evaluate an ...
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 1998
In this paper, 60 GHz indoor broadband wireless channels are measured with various configurations... more In this paper, 60 GHz indoor broadband wireless channels are measured with various configurations in a typical office environment. Measurements are taken at nine positions of the room and the base-station antenna is placed either at the center or at an edge of the measurement ...
2007 IEEE 66th Vehicular Technology Conference, 2007
Digital interactive mobile broadcasting application realizes the delivery of multimedia service a... more Digital interactive mobile broadcasting application realizes the delivery of multimedia service and new value-added services for consumers and business areas. Meanwhile, one of the challenging issues for its successful deployment is radio spectrum resource management for the interactive feature and the broadcasting of additional contents besides the existing digital TV programs. In this paper, a Cognitive Radio (CR)-based digital interactive
2006 IEEE International Symposium on Circuits and Systems, 2006
Spectrum sensing technology is most vital to the implementation of a CR system using dynamic spec... more Spectrum sensing technology is most vital to the implementation of a CR system using dynamic spectrum resource management. This paper suggested a CR system architecture with a wideband dual-stage spectrum sensing technique -a coarse and a fine spectrum sensing. Specifically, the coarse spectrum sensing technique adopted wavelet transforms in this architecture to provide a Multi-Resolution Spectrum Sensing (MRSS) feature. Analog implementation of the MRSS block offers wideband, low-power, and real-time operation. From the system simulation results, MRSS achieved 15-, 20-, and 30-dB detection margin for FM, VSB, and OFDM signals, having the corresponding signal power of -110, -120, and -120 dBm, respectively.
IEEE Vehicular Technology Conference, 2006
A cognitive radio (CR) access technique is a promising solution for the dynamic spectrum resource... more A cognitive radio (CR) access technique is a promising solution for the dynamic spectrum resource usage. This paper presented a CR testbed system employing a wideband multi-resolution spectrum sensing (MRSS) technique. Analog implementation of the MRSS block offers wideband, low-power, and real-time operation. The MRSS experiments were performed using the developed CR testbed system. The experiment results showed that the
2006 IEEE MTT-S International Microwave Symposium Digest, 2006
In this paper, a reconfigurable CMOS equalizer is presented to accommodate vast variety of backpl... more In this paper, a reconfigurable CMOS equalizer is presented to accommodate vast variety of backplane channel loss characteristics. Backplane channels over different trace lengths and dielectric materials were measured and characterized. Feed-forward equalizer (FFE) topology with finite impulse response (FIR) architecture was chosen for optimal equalization for the corresponding backplane configurations. For a reconfigurable FFE IC implementation, wide-range tunable delay-line
IEEE International Symposium on Circuits and Systems, 2006
In order to realize adjustable equalization over various backplane channel configurations, a reco... more In order to realize adjustable equalization over various backplane channel configurations, a reconfigurable fully-integrated equalizer IC is presented. Backplane channels over different trace lengths and dielectric materials were measured and characterized. Feed-forward equalizer (FFE) topology with finite impulse response (FIR) architecture was chosen for optimal equalization for the corresponding backplane configurations. For a reconfigurable FFE IC implementation, wide-range tunable active
Fifth International Workshop on System-on-Chip for Real-Time Applications (IWSOC'05), 2005
This paper introduces a novel clock recovery scheme for multilevel high speed serial data transmi... more This paper introduces a novel clock recovery scheme for multilevel high speed serial data transmission. The system extracts the clock from a 10 Gb/s pulse amplitude modulated (PAM)-4 input signal. The output is non-return-to-zero (NRZ) data synchronized with the clock. Conventional methods recover the clock by over-sampling the received signal, which requires complicated circuit to implement. In contrast, the proposed
2007 IEEE International Symposium on Circuits and Systems, 2007
In this paper, a BiCMOS equalizer using an active delay line structure for backplane communicatio... more In this paper, a BiCMOS equalizer using an active delay line structure for backplane communication is investigated. Equalization is achieved using a finite impulse response (FIR) filter. The filter is implemented using variable gain blocks and delay elements. The variable gain function is implemented using a Gilbert cell topology, modified for high-speed application. The delay line is implemented using active
2006 Asia-Pacific Microwave Conference, 2006
The proposed multi-resolution spectrum sensing (MRSS) technique is a flexible, low-power, high-sp... more The proposed multi-resolution spectrum sensing (MRSS) technique is a flexible, low-power, high-speed spectrum-sensing solution for cognitive radio systems. Meanwhile, impairments of analog building blocks may degrade the accuracy of the proposed MRSS performance. In this paper, the effect of non-idealities of an integrator is explored. The dominant pole position is suggested to be less than 20% of the spectrum-sensing resolution-
2007 Ieee International Symposium on Circuits and Systems, May 27, 2007
In this paper, a BiCMOS equalizer using an active delay line structure for backplane communicatio... more In this paper, a BiCMOS equalizer using an active delay line structure for backplane communication is investigated. Equalization is achieved using a finite impulse response (FIR) filter. The filter is implemented using variable gain blocks and delay elements. The variable gain function is implemented using a Gilbert cell topology, modified for high-speed application. The delay line is implemented using active
Proceedings. 45th Annual IEEE Symposium on Foundations of Computer Science, 2004
This paper demonstrates an active Near-End-Crosstalk (NEXT) noise canceller intended for use in c... more This paper demonstrates an active Near-End-Crosstalk (NEXT) noise canceller intended for use in commercial backplanes. Optimum system architecture and specifications a r e generated using measured channel data. Additionally, CMOS circuit implementation approaches a r e introduced and their performances a r e discussed. The NEXT canceller is applied to a 20Gbps 4-PAM signal over a 16-inch backplane channel and shows 75% cancellation. 0-7803-8470
2005 IEEE International Symposium on Circuits and Systems, 2005
In this paper, active filter structures in a near-end crosstalk (NEXT) noise canceller for 20Gbit... more In this paper, active filter structures in a near-end crosstalk (NEXT) noise canceller for 20Gbit/s throughput is investigated. The active filters provide tunable noise emulation circuits and comprise the primary components of an analog NEXT canceller architecture. The two topologies proposed are a pole-zero (PZ) filter and a finite impulse response (FIR) filter. The NEXT canceller is designed in a
RAWCON 99. 1999 IEEE Radio and Wireless Conference (Cat. No.99EX292), 1999
Abstract This paper reports a new simulation method using software based millimeter-wave test bed... more Abstract This paper reports a new simulation method using software based millimeter-wave test bed that has been developed to emulate a wide range of millimeter-wave communication concepts in the hardware-in-the-loop-simulations and to evaluate an ...
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 1998
In this paper, 60 GHz indoor broadband wireless channels are measured with various configurations... more In this paper, 60 GHz indoor broadband wireless channels are measured with various configurations in a typical office environment. Measurements are taken at nine positions of the room and the base-station antenna is placed either at the center or at an edge of the measurement ...
2007 IEEE 66th Vehicular Technology Conference, 2007
Digital interactive mobile broadcasting application realizes the delivery of multimedia service a... more Digital interactive mobile broadcasting application realizes the delivery of multimedia service and new value-added services for consumers and business areas. Meanwhile, one of the challenging issues for its successful deployment is radio spectrum resource management for the interactive feature and the broadcasting of additional contents besides the existing digital TV programs. In this paper, a Cognitive Radio (CR)-based digital interactive
2006 IEEE International Symposium on Circuits and Systems, 2006
Spectrum sensing technology is most vital to the implementation of a CR system using dynamic spec... more Spectrum sensing technology is most vital to the implementation of a CR system using dynamic spectrum resource management. This paper suggested a CR system architecture with a wideband dual-stage spectrum sensing technique -a coarse and a fine spectrum sensing. Specifically, the coarse spectrum sensing technique adopted wavelet transforms in this architecture to provide a Multi-Resolution Spectrum Sensing (MRSS) feature. Analog implementation of the MRSS block offers wideband, low-power, and real-time operation. From the system simulation results, MRSS achieved 15-, 20-, and 30-dB detection margin for FM, VSB, and OFDM signals, having the corresponding signal power of -110, -120, and -120 dBm, respectively.
IEEE Vehicular Technology Conference, 2006
A cognitive radio (CR) access technique is a promising solution for the dynamic spectrum resource... more A cognitive radio (CR) access technique is a promising solution for the dynamic spectrum resource usage. This paper presented a CR testbed system employing a wideband multi-resolution spectrum sensing (MRSS) technique. Analog implementation of the MRSS block offers wideband, low-power, and real-time operation. The MRSS experiments were performed using the developed CR testbed system. The experiment results showed that the
2006 IEEE MTT-S International Microwave Symposium Digest, 2006
In this paper, a reconfigurable CMOS equalizer is presented to accommodate vast variety of backpl... more In this paper, a reconfigurable CMOS equalizer is presented to accommodate vast variety of backplane channel loss characteristics. Backplane channels over different trace lengths and dielectric materials were measured and characterized. Feed-forward equalizer (FFE) topology with finite impulse response (FIR) architecture was chosen for optimal equalization for the corresponding backplane configurations. For a reconfigurable FFE IC implementation, wide-range tunable delay-line
IEEE International Symposium on Circuits and Systems, 2006
In order to realize adjustable equalization over various backplane channel configurations, a reco... more In order to realize adjustable equalization over various backplane channel configurations, a reconfigurable fully-integrated equalizer IC is presented. Backplane channels over different trace lengths and dielectric materials were measured and characterized. Feed-forward equalizer (FFE) topology with finite impulse response (FIR) architecture was chosen for optimal equalization for the corresponding backplane configurations. For a reconfigurable FFE IC implementation, wide-range tunable active
Fifth International Workshop on System-on-Chip for Real-Time Applications (IWSOC'05), 2005
This paper introduces a novel clock recovery scheme for multilevel high speed serial data transmi... more This paper introduces a novel clock recovery scheme for multilevel high speed serial data transmission. The system extracts the clock from a 10 Gb/s pulse amplitude modulated (PAM)-4 input signal. The output is non-return-to-zero (NRZ) data synchronized with the clock. Conventional methods recover the clock by over-sampling the received signal, which requires complicated circuit to implement. In contrast, the proposed
2007 IEEE International Symposium on Circuits and Systems, 2007
In this paper, a BiCMOS equalizer using an active delay line structure for backplane communicatio... more In this paper, a BiCMOS equalizer using an active delay line structure for backplane communication is investigated. Equalization is achieved using a finite impulse response (FIR) filter. The filter is implemented using variable gain blocks and delay elements. The variable gain function is implemented using a Gilbert cell topology, modified for high-speed application. The delay line is implemented using active
2006 Asia-Pacific Microwave Conference, 2006
The proposed multi-resolution spectrum sensing (MRSS) technique is a flexible, low-power, high-sp... more The proposed multi-resolution spectrum sensing (MRSS) technique is a flexible, low-power, high-speed spectrum-sensing solution for cognitive radio systems. Meanwhile, impairments of analog building blocks may degrade the accuracy of the proposed MRSS performance. In this paper, the effect of non-idealities of an integrator is explored. The dominant pole position is suggested to be less than 20% of the spectrum-sensing resolution-