communications is reliably and efficiently transmitting information signals over imperfect channels. One successful approach to achieving high-speed data transmission is multicarrier modulation (MCM), often also called multitone modulation . The principle of MCM is to divide the transmission channel into a number of orthogonal subchannels or subcarriers. This channel partitioning method attempt...

The pDSL technology is used for providing multiple, high-speed broadband links over power lines in the indoor environment. This work addresses the problem of bandwidth allocation between the various links of a pDSL network and proposes an algorithm for determining the allocation of the various subchannels during network activation and periodically during the normal network operation. The paper ...

In order to improve the reliability of data transmission, this paper proposes a HARQ combining scheme based on channel impulse response and confidence level in OFDM wireless system. The confidence level of subchannel is obtained according to the position of comb pilot sequence. In the proposed scheme, the same data is retransmitted immediately as soon as NACK is received at the transmitting ter...

Steering is the entanglement-based quantum effect that embodies the "spooky action at a distance" disliked by Einstein and scrutinized by Einstein, Podolsky, and Rosen. Here we provide a necessary and sufficient characterization of steering, based on a quantum information processing task: the discrimination of branches in a quantum evolution, which we dub subchannel discrimination. We prove tha...

Here, we consider the problem of jointly optimizing users' offloading decisions, communication and computing resource allocation in a sliced multi-cell mobile edge (MEC) network. We minimize weighted sum gap between observed delay at each slice its corresponding requirement, where weights set priority slice. Fractional form objective function, discrete subchannel allocation, considered partial ...

Channels with spectral nulls are sometimes dubbed bad channels because they can cause poor performance in communication systems. This correspondence investigates the validity of this intuition by studying the geometry of an orthogonal frequency-division multiplex (OFDM) system. It is shown that the subchannel attenuation coefficients form a natural coordinate system for describing finite-impuls...

We propose a compress-forward (CF) strategy for relaying over parallel Gaussian channels. The proposed CF strategy compresses received signals at the relay under a constraint on the product of their allowable distortions and forwards them to the destination over all subchannels. Power allocation over all subchannels at both the source and the relay and bit allocation for compressing received si...

Discrete Multitone (DMT) modulation is a multicarrier technique which makes efficient use of the channel, maximizing the throughput by sending different numbers of bits on different subchannels. The number of bits on each subchannel depends on the Signal-to-Noise Ratio of the subchannel. The performance of a DMT system can be further increased by using powerful coding techniques. This paper inv...

We address the efficient realization of a filtered multitone (FMT) modulation system and its orthogonal design. FMT modulation can be viewed as a Discrete Fourier Transform (DFT) modulated filter bank (FB). It generalizes the popular orthogonal frequency division multiplexing (OFDM) scheme by deploying frequency confined subchannel pulses. We compare three realizations that have been described ...