domain ofdm
RSS domain ofdmLow-Complexity Time-Domain ICI Equalization for OFDM Communications Over Rapidly Varying Channels
White Paper This paper considers wireless OFDM communications over rapidly varying channels as occurring e.g.in high-mobility scenarios. In contrast to existing frequency-domain approaches, the schemes operate in... [11 Apr 2007]
Joint Time-Domain Tracking of Channel and Frequency Offset for OFDM Systems
White Paper This paper addresses the problem of joint channel and frequency offset estimation and tracking for OFDM systems. The channel taps and the frequency offset are estimated in time-domain while equalization... [11 Apr 2007]
Space-Time Interference Cancellation in MIMO-OFDM Systems
White Paper In this paper, a two stage hybrid interference cancellation and equalization framework is proposed for interference cancellation in the uplink of Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing... [11 Apr 2007]
The Performance of OFDM-SDMA Systems With Power Amplifier Non-Linearities
White Paper Amplifier nonlinearities affect drastically the performance of Orthogonal Frequency Domain Multiplexing OFDM systems. In this paper, the effects of amplifier nonlinearities is evaluated in... [11 Apr 2007]
Efficient Detection of Zero-Padded OFDM Signals With Large Blocks
White Paper This paper presents a frequency-domain receiver for ZP-OFDM schemes (Zero-Padded Orthogonal Frequency Division Multiplexing) where the duration of the channel impulse response is a significant fraction... [11 Apr 2007]
Sidelobe Suppression in OFDM Systems
White Paper The method is termed Multiple-Choice Sequences (MCS) and operates in the frequency domain of an OFDM system. This paper develops a method for reducing out-of-band emission caused by high sidelobes in... [11 Apr 2007]
Pilot-Aided Channel Estimation for Systems With Virtual Carriers
White Paper This paper investigates various frequency-domain channel estimators for Orthogonal Frequency Division Multiplexing (OFDM) systems with Virtual Carriers (VCs). As conventional estimators cannot estimate... [11 Apr 2007]
Using Constellation Shaping to Reduce the Peak and Average Power of OFDM Signals
White Paper Adopting the successful shell mapping algorithm for high data rate transmission over telephone channels, as described in the V.34 Recommendation of ITU-T, the authors build a shell mapping algorithm for multidimensional constellation in... [11 Apr 2007]
Modeling of a Reconfigurable OFDM IP Block Family for an RF System Simulator
White Paper A common reconfigurable Mother Model for ten different standardized digital OFDM transmitters has been developed. The idea of design domain specific Mother Model of IP block family as a base of modeling... [11 Apr 2007]
Diversity Reception for OFDM Systems Using Antenna Arrays
White Paper Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation scheme that achieves high spectral efficiency by using minimally densely spaced orthogonal subcarriers without increasing the transmitter and... [11 Apr 2007]
Joint Compensation of Transmitter and Receiver Impairments in OFDM Systems
White Paper In this paper, the effect of both the transmitter and receiver IQ imbalances in an OFDM system is studied and algorithms are developed to compensate for such distortions in the digital domain. The... [11 Apr 2007]
Joint Compensation of OFDM Transmitter and Receiver IQ Imbalance in the Presence of Carrier Frequency Offset
White Paper In this paper the effect of both transmitter and receiver IQ imbalance under carrier frequency offset in an OFDM system is studied and algorithms are developed to compensate for such distortions in the digital... [11 Apr 2007]
A Space-Time FIR Equalizer Training Algorithm for MIMO-OFDM Systems
White Paper This paper proposes several new direct training-based methods for FIR space-time equalizer design in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems employing spatial... [11 Apr 2007]
Multichannel Feedback in OFDM Ad Hoc Networks
White Paper This paper proposes a multichannel feedback protocol to enable local scheduling with channel state information for wireless networks with Orthogonal Frequency Division Multiplexing (OFDM). In the proposed protocol, the... [11 Apr 2007]
Algorithms for Quantized Precoding in MIMO OFDM Beamforming Systems
White Paper In this paper, Orthogonal Frequency Division Multiplexing (OFDM) is considered as a low complexity implementation of MIMO beamforming combining over frequency selective channels. The clustering algorithms group the... [11 Apr 2007]
