A multiple access relay channel (MARC) is considered in which an analogue-like network coding is implemented in the relay node. This analogue coding is a simple addition of the received signals at the relay node. Using “nulling detection” structure employed in V-BLAST receiver, we propose a detection scheme in the destination which is able to provide a diversity order of two for all users. We a...

Indexing terms: Bus-invert coding, Low power ____________________________________________________________________________________ Abstract: This Letter proposes a partial bus-invert coding scheme that reduces the total number of bus transitions further than the conventional bus-invert coding. In the proposed scheme, only a selected subset of the bus lines, which is determined statically, is con...

We present an optimized channel coding scheme for OFDM transmitter. Traditional coding methods use regular codes, in the sense that each bit participates in the same way to the channel encoding. Our approach consists in using a priory assumption on the channel available at the transmitter in order to optimize the coding scheme. We have considered the irregular Gallager block codes in our study....

We introduce a novel approach for compressive coding at the sensor layer for an integrated imaging system. Compression at the physical layer reduces the measurements-to-pixels ratio and the data volume for storage and transmission, without confounding image estimation or analysis. We introduce a particular compressive coding scheme based on the quantized Cosine transform (QCT) and the correspon...

A new coding scheme for general N -node relay networks is presented for unicast, multicast, and broadcast. The proposed distributed decode–forward scheme combines and generalizes Marton coding for single-hop broadcast channels and the Cover–El Gamal partial decode–forward coding scheme for 3-node relay channels. The key idea of the scheme is to precode all the codewords of the entire network at...

Many communication systems can be modeled as having a noisy forward channel and a noisy or noiseless feedback channel. The use of the feedback channel is of great interest because it can greatly lower the complexity of the modulation scheme for the forward channel. In addition to complexity benefits, it can greatly increase the rate at which the probability of error decays. In this paper, we lo...

In this paper, we propose a modulation multiplexing distributed space-time coding for two-user cooperative diversity in wireless network, in which the information of one user lies in the in-phase axis (I axis), while that of the other user lies in quadrature-phase axis (Q axis). Since two users share both time and frequency resource in cooperation sub-frame, the proposed scheme is more bandwidt...

Indexing terms: Bus-invert coding, Low power ____________________________________________________________________________________ Abstract: This Letter proposes a partial bus-invert coding scheme that reduces the total number of bus transitions further than the conventional bus-invert coding. In the proposed scheme, only a selected subset of the bus lines, which is determined statically, is con...