Fuyun Ling - Academia.edu (original) (raw)

Papers by Fuyun Ling

This paper presents a predictive decision-feedback equalizar (PDFE) implemented in a lattice stru... more This paper presents a predictive decision-feedback equalizar (PDFE) implemented in a lattice structure. The performance and computational complexity of the lattice PDFE is analyzed, evaluated through computer simulation, and compared with other equalizers. It is shown that the lattice PDFE requires about one half as many computations as the conventional lattice DFE when both have the same number of taps.

IEEE Transactions on Communications, 1989

The use of an intersymbol interpolation method in training fractionally spaced equalizers (FSEs) ... more The use of an intersymbol interpolation method in training fractionally spaced equalizers (FSEs) is investigated. It is shown that the optimal interpolation filter depends on the amplitude frequency response of the transmitter filter and the channel. Using a nonoptimal interpolation filter increases the stead-state mean-square error of the FSE. An interpolated complex FSE (CFSE) using a stochastic gradient, or LMS, adaptive algorithm has very little advantage over an LMS CFSE with symbol-rate updating. However, an interpolated LMS phase-splitting FSE (PS-FSE) has a convergence speed that is twice as fast as a conventional PS-FSE. Special precautions for evaluating the performance of interpolated FSEs are discussed, and a novel evaluation scheme is proposed

ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1986

The development of systolic array processors is very important for real-time adaptive array proce... more The development of systolic array processors is very important for real-time adaptive array processing applications. In this paper a numerically robust algorithm, based on the modified Gram-Schmidt (MGS) method, is presented. The algorithm can be efficiently realized using a systolic architecture and is capable of handling both exponential and finite memory windows in order to cope with time-varying data. Finally,

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1984

A generalized multichannel least squares (LS) lattice algorithm which is appropriate for multicha... more A generalized multichannel least squares (LS) lattice algorithm which is appropriate for multichannel adaptive filtering and estimation is presented in this paper. It is shown that a muitichannel LS estimation algorithm with a different number of parameters to be estimated in each channel can be implemented by cascading lattice stages of nondescending dimension to form a generalized lattice structure. A

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986

... Least-Squares Estimation FUYUN LING, MEMBER, IEEE, DIMITRIS MANOLAKIS, AND JOHN G. PROAKIS, F... more ... Least-Squares Estimation FUYUN LING, MEMBER, IEEE, DIMITRIS MANOLAKIS, AND JOHN G. PROAKIS, FELLOW, IEEE Abstract-This Paper presents a recbrsive form of the modified Grani-Schmidt algorithm (RMGS). ... (T2.2) Fori = 1 toNdo - (i ) 4i(t, t) = qi 0 , (7-2.3) ...

1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century, 1995

The performance and achievable capacity of a coherent reverse channel of an IS-95-like DS-CDMA sy... more The performance and achievable capacity of a coherent reverse channel of an IS-95-like DS-CDMA system previously described by Ling (see IEEE Proc. VTC'93, p.400-403, May 19993) are evaluated. A general analysis of the receiver performance that extends the previous results and provides insight into the system performance and design considerations is given. A similar analysis is then performed for evaluation

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986

... Numerically Robust Least-Squares Lattice-Ladder ... Exact least-squares (LS) algorithms for F... more ... Numerically Robust Least-Squares Lattice-Ladder ... Exact least-squares (LS) algorithms for FIR adaptive filters, realized by a lattice-ladder structure, have been extensively studied in the literature [1 ... j ) = z(j) + ck(n> is the estimation error at time j based on data up to the time n. In ...

Mobile Multimedia Broadcasting Standards, 2009

2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2005

The specific requirements of a design for terrestrial mobile multimedia multicast physical layer ... more The specific requirements of a design for terrestrial mobile multimedia multicast physical layer are described. The technical characteristics of the FLOtrade physical layer are described in the context of the identified requirements. Simulation results are presented

The behavior of the delayed least-mean-square (DLMS) algorithm is studied. It is found that the s... more The behavior of the delayed least-mean-square (DLMS) algorithm is studied. It is found that the step size in the coefficient update plays a key role in the convergence and stability of the algorithm. An upper bound for the step size is derived that ensures the stability of the DLMS. The relationship between the step size and the convergence speed, and

Applied Radiation and Isotopes - APPL RADIAT ISOTOPES, 1995

There are many radio access standards contending for attention in the world-wide cellular marketp... more There are many radio access standards contending for attention in the world-wide cellular marketplace. Practical estimator methods and sequences are introduced for the reference symbol based DS-CDMA radio (denoted “RC”). It is a physical layer scheme involving insertion of a known training sequence into the coded, interleaved bit stream for an IS-95-like CDMA reverse channel. This paper presents the principle estimators needed for implementation of an RC receiver, and frame error rate (FER) results for a flat fading channel. The frame error rate or Eb/No required for a 1% FER is given for both idealized and realistic conditions concerning time varying carrier frequency offset and delay slew of the received timing. A comparison to IS-95 shows a 2 dB improvement

International Journal of Wireless Information Networks, 1994

One of the main problems in the proposed Northern American digital cellular system (IS-54) is the... more One of the main problems in the proposed Northern American digital cellular system (IS-54) is the poor performance of the receiver for fast fading channels. The authors propose to use a novel joint data and channel estimation technique to improve performance. The basic idea of this method was described by N. Seshadri (1990) in the context of blind equalization. Simulation results indicate that this approach solves the problems of decision delay and divergence caused by error decision feedback in conventional maximum likelihood sequence estimation (MLSE). The specified IS-54 requirement of 19 dB at a BER of 3% and a speed of 100 km/h can be met with a margin of 8 dB. This result is 4.5 dB better than the conventional maximum likelihood receiver

IEEE Transactions on Vehicular Technology, 2000

Abstract—The power controlled IS-95 reverse-link is studied. It is observed that received signals... more Abstract—The power controlled IS-95 reverse-link is studied. It is observed that received signals from multiple links under soft handoff and power control are not independent but anticorrelated. The cause of the anticorrelation is investigated through analysis and ...

IEEE Transactions on Signal Processing, 1992

incidence (14) and the complex polarity coincidence (19) estimators are plotted versus the observ... more incidence (14) and the complex polarity coincidence (19) estimators are plotted versus the observation time Tfor uf = 3.0 [Hz], fd = 7.142 [Hz].

IEEE Transactions on Communications, 1995

Abstmcf-For CDMA (code-division multiple-access) wireless communications systems, orthogonal sign... more Abstmcf-For CDMA (code-division multiple-access) wireless communications systems, orthogonal signaliag with noncoherent detection has been proposed when a reference phase is not available. In this paper, orthogonal signaling using Walsh si@s Paper approved by R. A. Valenzuela, the Editor for Transmission Systems of the IEEE Communications Society.

IEEE Transactions on Communications, 1990

An extension is presented of the work of V.M. Eyubogin (see ibid., vol.36, p.401-9, Apr. 1988) on... more An extension is presented of the work of V.M. Eyubogin (see ibid., vol.36, p.401-9, Apr. 1988) on decision-feedback equalization (DFE) applied to coded systems with interleaving. The authors study the adaptive implementation of the DFE using recursive-least-squares algorithms (RLS). System performance on time-dispersive channels with nulls as well as on channels with relatively small intersymbol interference is investigated. A reference

IEEE Transactions on Communications, 2000

... it is started, a pair of stages can be added or dropped during operation, while keeping thedi... more ... it is started, a pair of stages can be added or dropped during operation, while keeping thedifference between the number ... the total number of parameters of a DFE, where Nl and Nz are the number of feedforward and feedback ... The results explain the poor tracking characteristics ...

IEEE Transactions on Broadcasting, 2000

This paper provides an overview of the physical layer of the Forward Link Only (FLO) Air Interfac... more This paper provides an overview of the physical layer of the Forward Link Only (FLO) Air Interface. The FLO Air Interface is a key component of the MediaFLO system developed by QUALCOMM as an alternative mobile multicast technology for the efficient transmission of multiple multi-media streams to mobile devices using TV and multi-media channel bandwidths in VHF, UHF, or L-band. The main concepts and features of the FLO Air Interface including the modulation and coding techniques used, the frame structure, and the different sub-channels within the physical layer are described. The available data rates as well as other characteristics of FLO are also described. Finally, the performance of the FLO physical layer in representative channel environments is presented.

* Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery t... more * Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery time. No discounts or returns apply. ... Standard delivery in the US is 7 to 10 business days and outside the US delivery is 4 to 6 weeks or longer. For further details, please see shipping policy. ... Listed below are the papers found in this volume. Click the paper title to view an abstract or to order an individual paper. ... Author(s): Zhi Ding; CR Johnson, Jr. ... What have neural networks to offer statistical pattern processing?

This paper presents a predictive decision-feedback equalizar (PDFE) implemented in a lattice stru... more This paper presents a predictive decision-feedback equalizar (PDFE) implemented in a lattice structure. The performance and computational complexity of the lattice PDFE is analyzed, evaluated through computer simulation, and compared with other equalizers. It is shown that the lattice PDFE requires about one half as many computations as the conventional lattice DFE when both have the same number of taps.

IEEE Transactions on Communications, 1989

The use of an intersymbol interpolation method in training fractionally spaced equalizers (FSEs) ... more The use of an intersymbol interpolation method in training fractionally spaced equalizers (FSEs) is investigated. It is shown that the optimal interpolation filter depends on the amplitude frequency response of the transmitter filter and the channel. Using a nonoptimal interpolation filter increases the stead-state mean-square error of the FSE. An interpolated complex FSE (CFSE) using a stochastic gradient, or LMS, adaptive algorithm has very little advantage over an LMS CFSE with symbol-rate updating. However, an interpolated LMS phase-splitting FSE (PS-FSE) has a convergence speed that is twice as fast as a conventional PS-FSE. Special precautions for evaluating the performance of interpolated FSEs are discussed, and a novel evaluation scheme is proposed

ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1986

The development of systolic array processors is very important for real-time adaptive array proce... more The development of systolic array processors is very important for real-time adaptive array processing applications. In this paper a numerically robust algorithm, based on the modified Gram-Schmidt (MGS) method, is presented. The algorithm can be efficiently realized using a systolic architecture and is capable of handling both exponential and finite memory windows in order to cope with time-varying data. Finally,

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1984

A generalized multichannel least squares (LS) lattice algorithm which is appropriate for multicha... more A generalized multichannel least squares (LS) lattice algorithm which is appropriate for multichannel adaptive filtering and estimation is presented in this paper. It is shown that a muitichannel LS estimation algorithm with a different number of parameters to be estimated in each channel can be implemented by cascading lattice stages of nondescending dimension to form a generalized lattice structure. A

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986

... Least-Squares Estimation FUYUN LING, MEMBER, IEEE, DIMITRIS MANOLAKIS, AND JOHN G. PROAKIS, F... more ... Least-Squares Estimation FUYUN LING, MEMBER, IEEE, DIMITRIS MANOLAKIS, AND JOHN G. PROAKIS, FELLOW, IEEE Abstract-This Paper presents a recbrsive form of the modified Grani-Schmidt algorithm (RMGS). ... (T2.2) Fori = 1 toNdo - (i ) 4i(t, t) = qi 0 , (7-2.3) ...

1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century, 1995

The performance and achievable capacity of a coherent reverse channel of an IS-95-like DS-CDMA sy... more The performance and achievable capacity of a coherent reverse channel of an IS-95-like DS-CDMA system previously described by Ling (see IEEE Proc. VTC'93, p.400-403, May 19993) are evaluated. A general analysis of the receiver performance that extends the previous results and provides insight into the system performance and design considerations is given. A similar analysis is then performed for evaluation

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986

... Numerically Robust Least-Squares Lattice-Ladder ... Exact least-squares (LS) algorithms for F... more ... Numerically Robust Least-Squares Lattice-Ladder ... Exact least-squares (LS) algorithms for FIR adaptive filters, realized by a lattice-ladder structure, have been extensively studied in the literature [1 ... j ) = z(j) + ck(n> is the estimation error at time j based on data up to the time n. In ...

Mobile Multimedia Broadcasting Standards, 2009

2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2005

The specific requirements of a design for terrestrial mobile multimedia multicast physical layer ... more The specific requirements of a design for terrestrial mobile multimedia multicast physical layer are described. The technical characteristics of the FLOtrade physical layer are described in the context of the identified requirements. Simulation results are presented

The behavior of the delayed least-mean-square (DLMS) algorithm is studied. It is found that the s... more The behavior of the delayed least-mean-square (DLMS) algorithm is studied. It is found that the step size in the coefficient update plays a key role in the convergence and stability of the algorithm. An upper bound for the step size is derived that ensures the stability of the DLMS. The relationship between the step size and the convergence speed, and

Applied Radiation and Isotopes - APPL RADIAT ISOTOPES, 1995

There are many radio access standards contending for attention in the world-wide cellular marketp... more There are many radio access standards contending for attention in the world-wide cellular marketplace. Practical estimator methods and sequences are introduced for the reference symbol based DS-CDMA radio (denoted “RC”). It is a physical layer scheme involving insertion of a known training sequence into the coded, interleaved bit stream for an IS-95-like CDMA reverse channel. This paper presents the principle estimators needed for implementation of an RC receiver, and frame error rate (FER) results for a flat fading channel. The frame error rate or Eb/No required for a 1% FER is given for both idealized and realistic conditions concerning time varying carrier frequency offset and delay slew of the received timing. A comparison to IS-95 shows a 2 dB improvement

International Journal of Wireless Information Networks, 1994

One of the main problems in the proposed Northern American digital cellular system (IS-54) is the... more One of the main problems in the proposed Northern American digital cellular system (IS-54) is the poor performance of the receiver for fast fading channels. The authors propose to use a novel joint data and channel estimation technique to improve performance. The basic idea of this method was described by N. Seshadri (1990) in the context of blind equalization. Simulation results indicate that this approach solves the problems of decision delay and divergence caused by error decision feedback in conventional maximum likelihood sequence estimation (MLSE). The specified IS-54 requirement of 19 dB at a BER of 3% and a speed of 100 km/h can be met with a margin of 8 dB. This result is 4.5 dB better than the conventional maximum likelihood receiver

IEEE Transactions on Vehicular Technology, 2000

Abstract—The power controlled IS-95 reverse-link is studied. It is observed that received signals... more Abstract—The power controlled IS-95 reverse-link is studied. It is observed that received signals from multiple links under soft handoff and power control are not independent but anticorrelated. The cause of the anticorrelation is investigated through analysis and ...

IEEE Transactions on Signal Processing, 1992

incidence (14) and the complex polarity coincidence (19) estimators are plotted versus the observ... more incidence (14) and the complex polarity coincidence (19) estimators are plotted versus the observation time Tfor uf = 3.0 [Hz], fd = 7.142 [Hz].

IEEE Transactions on Communications, 1995

Abstmcf-For CDMA (code-division multiple-access) wireless communications systems, orthogonal sign... more Abstmcf-For CDMA (code-division multiple-access) wireless communications systems, orthogonal signaliag with noncoherent detection has been proposed when a reference phase is not available. In this paper, orthogonal signaling using Walsh si@s Paper approved by R. A. Valenzuela, the Editor for Transmission Systems of the IEEE Communications Society.

IEEE Transactions on Communications, 1990

An extension is presented of the work of V.M. Eyubogin (see ibid., vol.36, p.401-9, Apr. 1988) on... more An extension is presented of the work of V.M. Eyubogin (see ibid., vol.36, p.401-9, Apr. 1988) on decision-feedback equalization (DFE) applied to coded systems with interleaving. The authors study the adaptive implementation of the DFE using recursive-least-squares algorithms (RLS). System performance on time-dispersive channels with nulls as well as on channels with relatively small intersymbol interference is investigated. A reference

IEEE Transactions on Communications, 2000

... it is started, a pair of stages can be added or dropped during operation, while keeping thedi... more ... it is started, a pair of stages can be added or dropped during operation, while keeping thedifference between the number ... the total number of parameters of a DFE, where Nl and Nz are the number of feedforward and feedback ... The results explain the poor tracking characteristics ...

IEEE Transactions on Broadcasting, 2000

This paper provides an overview of the physical layer of the Forward Link Only (FLO) Air Interfac... more This paper provides an overview of the physical layer of the Forward Link Only (FLO) Air Interface. The FLO Air Interface is a key component of the MediaFLO system developed by QUALCOMM as an alternative mobile multicast technology for the efficient transmission of multiple multi-media streams to mobile devices using TV and multi-media channel bandwidths in VHF, UHF, or L-band. The main concepts and features of the FLO Air Interface including the modulation and coding techniques used, the frame structure, and the different sub-channels within the physical layer are described. The available data rates as well as other characteristics of FLO are also described. Finally, the performance of the FLO physical layer in representative channel environments is presented.

* Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery t... more * Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery time. No discounts or returns apply. ... Standard delivery in the US is 7 to 10 business days and outside the US delivery is 4 to 6 weeks or longer. For further details, please see shipping policy. ... Listed below are the papers found in this volume. Click the paper title to view an abstract or to order an individual paper. ... Author(s): Zhi Ding; CR Johnson, Jr. ... What have neural networks to offer statistical pattern processing?