David Falconer - Academia.edu (original) (raw)
Papers by David Falconer
IEEE Communications Letters, 2004
IEEE Transactions on Vehicular Technology, 2000
ABSTRACT Block transmission techniques, with appropriate cyclic prefix and frequency-domain proce... more ABSTRACT Block transmission techniques, with appropriate cyclic prefix and frequency-domain processing schemes, have been shown to be excellent candidates for digital transmission over severely time-dispersive channels, allowing good performance with implementation complexity that is much lower than traditional time-domain processing schemes. Orthogonal frequency-division multiplexing (OFDM) modulation is the most popular block transmission technique. Single-carrier (SC) modulation using frequency-domain equalization (FDE) is an attractive alternative approach based on this principle. In this paper, we propose two new receiver structures for multiple-input-multiple-output (MIMO) channels employing SC (MIMO-SC) modulation and FDE schemes. These receivers have a hybrid structure with frequency-domain feedforward and time-domain feedback filters for intersymbol interference (ISI) and interference cancellation. The proposed schemes are compared with different MIMO systems employing OFDM modulation (MIMO-OFDM) receivers in terms of performance [bit error rate (BER) and throughput] and complexity. Our performance results show the superiority of MIMO-SC approaches relative to MIMO-OFDM in terms of the BER performance for the simulated scenarios. Also, the simulation results show that the proposed hybrid MIMO-SC receivers yield a higher throughput than a MIMO-OFDM system.
IEEE Transactions on Communications, 1973
Single-carrier transmission is one of the most potential options for uplink transmission in wide-... more Single-carrier transmission is one of the most potential options for uplink transmission in wide-area deployments. It combines the benefits of computationally simple transmitter processing and highly efficient power amplification at the terminal. Frequency-domain methods for efficient equalization can be utilized at the access point either in linear MMSE equalization or in iterative turbo equalization. We describe the potential solutions in
Wireless Communications Conference, 1992
The authors investigate the performance of a decision-feedback equalizer in the presence of co-ch... more The authors investigate the performance of a decision-feedback equalizer in the presence of co-channel interference. Through ideal calculations and simulations under static channel conditions, they show that a DFE is capable of achieving significantly better performance in the presence of CCI than in an equal amount of noise. Furthermore, they observe that DFE performance in the presence of co-channel interference
[Proceedings] GLOBECOM '90: IEEE Global Telecommunications Conference and Exhibition, 1990
Optimum baseband combining with coherent BPSK (binary phase-shift keying) or QPSK (quadrature pha... more Optimum baseband combining with coherent BPSK (binary phase-shift keying) or QPSK (quadrature phase-shift keying) is an attractive technique for wideband TDMA (time-division multiple-access) portable communication radio links in view of its ability not only to combat dispersive fading but also to cancel cochannel interference. The performance of such a scheme is investigated for data rates ranging from 1 to 20
GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2001
Vehicular Technology, IEEE Conference, 1992
A family of orthogonal/convolutional codes for mobile CDMA communications is discussed. Their des... more A family of orthogonal/convolutional codes for mobile CDMA communications is discussed. Their design and implementational aspects are discussed. The R0 parameter of this family of codes is analyzed and presented in a uniform format. It is shown that it is desirable to use a code with a higher mobile CDMA communications. Simulation results are given. In particular, the authors simulated
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2004
In this paper we present a multiple access scheme for the up-link of broadband wireless systems. ... more In this paper we present a multiple access scheme for the up-link of broadband wireless systems. We consider SC-based (Single Carrier) block transmission, with all users transmitting continuously, regardless of their data-rate. The transmitted signals can have very low ...
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2004
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007
Abstract A low complexity frequency domain iterative decision-directed channel estimation (FD-ID... more Abstract A low complexity frequency domain iterative decision-directed channel estimation (FD-IDDCE) technique for single-carrier (SC) systems with frequency domain multiplexed (FDM) pilots is proposed. The tentative hard decisions from either the frequency domain ...
2002 IEEE Wireless Communications and Networking Conference Record. WCNC 2002 (Cat. No.02TH8609), 2002
2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484), 2003
Proceedings of 1997 Wireless Communications Conference, 1997
Abstract This paper reports on the work performed on the broadband indoor 29.5-GHz radio channel ... more Abstract This paper reports on the work performed on the broadband indoor 29.5-GHz radio channel measurements employing a directional-to-directional antenna configuration. The use of a programmable array antenna at the receiver allows investigations of the channel behavior for various reception angles. The reported results include the channel delay spread properties, the angle-dependent received power, and the correlation of two signals of different reception directions
Canadian Conference on Electrical and Computer Engineering 2004 (IEEE Cat. No.04CH37513), 2004
In this paper, we consider the uplink of SC-based (single-carrier) block transmission systems whe... more In this paper, we consider the uplink of SC-based (single-carrier) block transmission systems where the transmission bandwidth associated to each channel, exceeds the symbol rate and we can have significant overlapping between adjacent channels. We present an iterative frequency-domain receiver for joint equalization and ACI (adjacent channel interference) suppression taking advantage of spectral correlations for the separation of cyclostationary signals.
Vehicular Technology, IEEE Conference, 1995
A new PHASE algorithm is proposed for blind adaptive extraction of signal in the presence of inte... more A new PHASE algorithm is proposed for blind adaptive extraction of signal in the presence of interference by cyclostationary signal processing using an antenna array. The algorithm operates in an interference-limited system in which the desired and interfering signals have equal symbol rates, but slightly different carrier frequencies. Compared to the SCORE algorithm and a modified version of SCORE, the
IEEE Transactions on Communications, 1995
The paper concerns the feasibility and achievable performance of adaptive filtering in an interfe... more The paper concerns the feasibility and achievable performance of adaptive filtering in an interference-limited multipath fading environment as encountered in indoor wireless communications. In a typical cellular radio application, the performance-limiting impairment is interference due to synchronous data streams from other co-channel and adjacent channel users (CCI and ACI). The receiver under consideration employs an adaptive fractionally spaced decision feedback
IEEE Communications Letters, 2004
IEEE Transactions on Vehicular Technology, 2000
ABSTRACT Block transmission techniques, with appropriate cyclic prefix and frequency-domain proce... more ABSTRACT Block transmission techniques, with appropriate cyclic prefix and frequency-domain processing schemes, have been shown to be excellent candidates for digital transmission over severely time-dispersive channels, allowing good performance with implementation complexity that is much lower than traditional time-domain processing schemes. Orthogonal frequency-division multiplexing (OFDM) modulation is the most popular block transmission technique. Single-carrier (SC) modulation using frequency-domain equalization (FDE) is an attractive alternative approach based on this principle. In this paper, we propose two new receiver structures for multiple-input-multiple-output (MIMO) channels employing SC (MIMO-SC) modulation and FDE schemes. These receivers have a hybrid structure with frequency-domain feedforward and time-domain feedback filters for intersymbol interference (ISI) and interference cancellation. The proposed schemes are compared with different MIMO systems employing OFDM modulation (MIMO-OFDM) receivers in terms of performance [bit error rate (BER) and throughput] and complexity. Our performance results show the superiority of MIMO-SC approaches relative to MIMO-OFDM in terms of the BER performance for the simulated scenarios. Also, the simulation results show that the proposed hybrid MIMO-SC receivers yield a higher throughput than a MIMO-OFDM system.
IEEE Transactions on Communications, 1973
Single-carrier transmission is one of the most potential options for uplink transmission in wide-... more Single-carrier transmission is one of the most potential options for uplink transmission in wide-area deployments. It combines the benefits of computationally simple transmitter processing and highly efficient power amplification at the terminal. Frequency-domain methods for efficient equalization can be utilized at the access point either in linear MMSE equalization or in iterative turbo equalization. We describe the potential solutions in
Wireless Communications Conference, 1992
The authors investigate the performance of a decision-feedback equalizer in the presence of co-ch... more The authors investigate the performance of a decision-feedback equalizer in the presence of co-channel interference. Through ideal calculations and simulations under static channel conditions, they show that a DFE is capable of achieving significantly better performance in the presence of CCI than in an equal amount of noise. Furthermore, they observe that DFE performance in the presence of co-channel interference
[Proceedings] GLOBECOM '90: IEEE Global Telecommunications Conference and Exhibition, 1990
Optimum baseband combining with coherent BPSK (binary phase-shift keying) or QPSK (quadrature pha... more Optimum baseband combining with coherent BPSK (binary phase-shift keying) or QPSK (quadrature phase-shift keying) is an attractive technique for wideband TDMA (time-division multiple-access) portable communication radio links in view of its ability not only to combat dispersive fading but also to cancel cochannel interference. The performance of such a scheme is investigated for data rates ranging from 1 to 20
GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2001
Vehicular Technology, IEEE Conference, 1992
A family of orthogonal/convolutional codes for mobile CDMA communications is discussed. Their des... more A family of orthogonal/convolutional codes for mobile CDMA communications is discussed. Their design and implementational aspects are discussed. The R0 parameter of this family of codes is analyzed and presented in a uniform format. It is shown that it is desirable to use a code with a higher mobile CDMA communications. Simulation results are given. In particular, the authors simulated
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2004
In this paper we present a multiple access scheme for the up-link of broadband wireless systems. ... more In this paper we present a multiple access scheme for the up-link of broadband wireless systems. We consider SC-based (Single Carrier) block transmission, with all users transmitting continuously, regardless of their data-rate. The transmitted signals can have very low ...
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2004
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007
Abstract A low complexity frequency domain iterative decision-directed channel estimation (FD-ID... more Abstract A low complexity frequency domain iterative decision-directed channel estimation (FD-IDDCE) technique for single-carrier (SC) systems with frequency domain multiplexed (FDM) pilots is proposed. The tentative hard decisions from either the frequency domain ...
2002 IEEE Wireless Communications and Networking Conference Record. WCNC 2002 (Cat. No.02TH8609), 2002
2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484), 2003
Proceedings of 1997 Wireless Communications Conference, 1997
Abstract This paper reports on the work performed on the broadband indoor 29.5-GHz radio channel ... more Abstract This paper reports on the work performed on the broadband indoor 29.5-GHz radio channel measurements employing a directional-to-directional antenna configuration. The use of a programmable array antenna at the receiver allows investigations of the channel behavior for various reception angles. The reported results include the channel delay spread properties, the angle-dependent received power, and the correlation of two signals of different reception directions
Canadian Conference on Electrical and Computer Engineering 2004 (IEEE Cat. No.04CH37513), 2004
In this paper, we consider the uplink of SC-based (single-carrier) block transmission systems whe... more In this paper, we consider the uplink of SC-based (single-carrier) block transmission systems where the transmission bandwidth associated to each channel, exceeds the symbol rate and we can have significant overlapping between adjacent channels. We present an iterative frequency-domain receiver for joint equalization and ACI (adjacent channel interference) suppression taking advantage of spectral correlations for the separation of cyclostationary signals.
Vehicular Technology, IEEE Conference, 1995
A new PHASE algorithm is proposed for blind adaptive extraction of signal in the presence of inte... more A new PHASE algorithm is proposed for blind adaptive extraction of signal in the presence of interference by cyclostationary signal processing using an antenna array. The algorithm operates in an interference-limited system in which the desired and interfering signals have equal symbol rates, but slightly different carrier frequencies. Compared to the SCORE algorithm and a modified version of SCORE, the
IEEE Transactions on Communications, 1995
The paper concerns the feasibility and achievable performance of adaptive filtering in an interfe... more The paper concerns the feasibility and achievable performance of adaptive filtering in an interference-limited multipath fading environment as encountered in indoor wireless communications. In a typical cellular radio application, the performance-limiting impairment is interference due to synchronous data streams from other co-channel and adjacent channel users (CCI and ACI). The receiver under consideration employs an adaptive fractionally spaced decision feedback