Power allocation for goodput optimization in BICM-OFDM systems

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Optimum goodput-oriented power allocation policy for BIC-OFDM packet transmissions

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Performance Analysis of a MC-CDMA Forward Link over Nonlinear Channels

This paper presents an analytical framework for the performance evaluation of an MC-CDMA forward-link in the presence of nonlinear distortions induced by transmitter's high-power amplifiers. The statistical characterization of the decision variable used for data detection is carried out through the application of the Bussgang theorem. Simulation results validate the accuracy of the proposed method under typical operating conditions

Iterative Nonlinear Channel Compensation for MC-CDMA Satellite Transmissions

In this paper we illustrate an efficient iterative multi-user predistorter scheme for the down-link of a satellite multiple access MC-CDMA which mitigates the nonlinear distortions induced by the power amplifier. Simulation results demonstrate that the proposed scheme can significantly improve the power efficiency of the satellite link

Theoretical Characterization of Nonlinear Distortion Noise in MC-CDMA Transmissions

This paper presents an analytical framework for the theoretical characterization and performance evaluation of an MC-CDMA forward-link in the presence of nonlinear distortions induced by transmitter's high-power amplifiers. The analytical characterization of the signal features, both in the time and frequency domains, is carried out through the application of the Bussgang theorem. Simulation results are derived to validate the accuracy of the proposed method under typical operating conditions

Minimum-PAPR Waveform Design for MC-CDMA Transmissions over Nonlinear Channels

In this contribution we demonstrate that the peak-to-average power ratio (PAPR) of a Multi-Carrier Code Division Multiple Access (MC-CDMA) signal can be suitably minimized by resorting to a judicious strategy for the allocation of the spreading signature codes. A low-complexity implementation of the proposed strategy is presented and its performance gain over conventional random allocation strategy is numerically assessed

A Pragmatic Bit and Power Allocation Algorithm for NOFDM Signalling

In this paper, a novel pragmatic bit and power allocation algorithm for Non Orthogonal Frequency Division Multiplexing (NOFDM) systems is presented. It is based on the well-known Campello approach and takes into account the lack of orthogonality between adjacent waveforms. Simulation results in a typical NOFDM wireless applicative scenario show the effectiveness of the proposed algorithms

A Novel Exponential Link Error Prediction Method for OFDM Systems

Coded multicarrier techniques combined together with link resources adaptation algorithms are the key technologies toward efficient high-data-rate communications over wireless fading channels. This paper contributes with a novel accurate yet simple method to predict at the transmitter the link performance of bit-interleaved coded (BIC) orthogonal frequency division multiplexing (OFDM) links, which offers appealing features when compared with conventional techniques. Its effectiveness is confirmed through extensive simulation results obtained over typical wireless channel environments

A Low-Complexity Spreading-Code Allocation Strategy for Reduced-PAPR MC-CDMA Transmissions

In this contribution we demonstrate that the peak-to-average power ratio (PAPR) of a Multi-Carrier Code Division Multiple Access (MC-CDMA) signal can be suitably minimized by resorting to a judicious strategy for the allocation of the spreading signature codes. A low-complexity implementation of the proposed strategy is presented and its performance gain over conventional random allocation strategy is numerically assessed