We consider secure communication over a two-user Gaussian interference channel, where each transmitter sends a confidential message to its legitimate receiver. For this setting, we identify a regime where the simple scheme of using Gaussian wiretap codebook at each transmitter (without cooperative jamming) and treating interference as noise at each intended receiver (in short, GWC-TIN scheme) a...

In this paper, we investigate practical turbo receiver design for throughput-efficient relay ARQ transmissions over broadband cooperative MIMO channels. Our setup is comprised of three multi-antenna nodes: a source, a destination, and a relay node operating under the amplify-and-forward half-duplex relaying mode. To attain higher system average throughput, we adopt a two-slot transmission strat...

In Wireless Sensor Networks large number of nodes and limited energy available per node calls for designing efficient transmission protocols. Cooperative transmission is one of the protocols which helps wireless nodes to achieve spatial diversity, which translates into reduction in transmission power or increase in coverage area. Cooperative protocol can be realized with or without (called conv...

An incremental relaying protocol based on the adaptive decode-and-forward (DF) relaying scheme is presented for a cooperative wireless network composed of one source, K relays, and one destination and with binary frequency-shift keying (BFSK) modulation. In order to reduce error propagation and satisfy bit error rate (BER) requirement, the proposed protocol employs two thresholds. One threshold...

Because of the gains like diversity, throughput, and the coverage extension provided by the multiple-input multipleout (MIMO) systems, it has been part of the various wireless communications standards. However, to reap the benefits offered by MIMO systems in size-constrained nodes, used in wireless communications, has been a challenging issue. To address this challenge, cooperative communicatio...

This work presents a novel diffusion based dualphase molecular communication system where the source leverages multiple cooperating nanomachines to improve the end-toend reliability of communication. The Neyman-Pearson Likelihood Ratio Tests are derived for each of the cooperative as well as the destination nanomachines in the presence of multiuser interference. Further, to characterize the per...