Polarization-division multiplexed (PDM) transmission based on the nonlinear Fourier transform (NFT) is proposed for optical fiber communication. The NFT algorithms are generalized from the scalar nonlinear Schrödinger equation for one polarization to the Manakov system for two polarizations. The transmission performance of the PDM nonlinear frequency-division multiplexing (NFDM) and PDM orthogo...

With the increase in radio communication devices and shared frequency spectrum between these devices, it is critical to neglect the effect of interference on wireless communications. In this paper, we have present the mathematical model of distribution of network interference. For a flexible and accurate representation, interference is modeled by alpha-stable distribution function and we have e...

Orthogonal frequency division multiplexing (OFDM), which uses a number of narrowband orthogonal sub-carriers, is a promising transmission technique. Also multi-carrier code division multi-access (MC-CDMA), which combines OFDM and frequency-domain spreading, has been attracting much attention as a future broadband wireless access. It was shown that MC-CDMA has lower channel capacity than OFDM, d...

In this paper, we propose optimal pilot pattern of downlink OFDM (Orthogonal Frequency Division Multiplexing) communication system. Current pilot patterns in OFDM system are evaluated with new criteria, new pilot pattern and “distance” filter which has small computational burden is suggested. The combination of suggested cell pilot pattern and “distance” filter provides better performance than ...

In this paper, we propose clipping noise cancellation scheme using compressed sensing (CS) for orthogonal frequency division multiplexing (OFDM) systems. In the proposed scheme, only the data tones with high reliability are exploited in reconstructing the clipping noise instead of the whole data tones. For reconstructing the clipping noise using a fraction of the data tones at the receiver, the...

We give here a mathematical context for polynomial cancellation coding, proposed recently to reduce intercarrier interference in orthogonal frequency division multiplexing (OFDM). In particular, we analyze polynomial cancellation coding (PCC) in terms of finite differences.

Orthogonal Frequency Division Multiplexing (OFDM) is a multi– channel modulation technique that makes use of Frequency division multiplexing (FDM) being modulated by a low bit rate digital stream. The main reason of using OFDM is because here the symbol detection is easy and also to increase the robustness against frequency selective fading and narrow band interference. In scenarios with time-v...

Recent developments in orthogonal frequency division multiplexing (OFDM) and single-carrier frequency-domain equalization (SCFDE) have sparked debate about the superiority of one method over the other. In this paper, we further this debate by comparing the theoretical performance of OFDM and SCFDE when each is implemented in one of two different multiple-input multiple-output (MIMO) architectur...

Orthogonal frequency division multiplexing (OFDM) is considered as one of the most promising techniques for next-generation wireless access systems. However, it may suffer from the so-called other-cell interference (OCI) in cellular environments. In this paper, we consider a novel resource allocation scheme to reduce the OCI in OFDM-based asynchronous cellular systems. The proposed scheme can r...

In this paper, we present weighted cyclic prefix orthogonal frequency division multiplexing (WCP-OFDM) as a generalization of traditional cyclic prefix OFDM (CP-OFDM). It allows the use of non-rectangular sub channel pulse shape in order to mitigate interference caused by time frequency selective channels. The precoding step may be required to reduce PAPR at the output of transmitter performanc...