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In this paper, we propose Patched Distributed Space-Time Block Codes (DSTBC) for the Dynamic Decode and Forward (DDF) Relaying protocol, in which the relay transmits combination of information from the first and second phase of the DDF protocol, and the destination makes a linear combination of symbols received in the two phases. Thus, from the error correcting code point of view, the number of coded...
This paper proposes a simple physical (PHY) layer design to introduce cooperation in the downlink of an infrastructure-based multicell multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) network. To improve the cell coverage, a novel PHY layer design is proposed that allows cooperation among an arbitrary and unknown number of base stations (BSs), by suitably randomizing...
We propose a new method of applying network coding for cooperative wireless networks. The network consists of multiple (M ges 2) users having independent information to be transmitted to a common base station (BS). These users form partners and relay information for each other. The transmission blocks are subject to block-fading with independent fading coefficients for each block. Designed non-binary...
In this paper, we study how to improve the performance of a decode-and-forward protocol based cooperative system over the delay constrained channels. We propose a simple transmission scheme, which makes the cooperative system tolerant of the delays caused by the poor synchronization of the relaying nodes. The proposed scheme is able to provide an improved coding gain in unsynchronized cooperative...
When channel state information (CSI) is not available to the transmitter, outage events might happen and automatic repeat request (ARQ) is implemented to ensure reliable transmission in such case. In this paper, we consider a three nodes relay system with hybrid relay scheme, where the relay, based on it decoding status, could switch between decode-and-forward (DF) and compress-and-forward (CF) adaptively...
We consider the problem of communication for a network composed of two half-duplex relays. A Successive relaying protocol in which the relays transmit their received messages successively to the destination is studied. A non-cooperative coding based on dirty paper coding (DPC) and a cooperative coding based on block Markov encoding (BME) are proposed and the optimum input distribution for the degraded...
Due to layer interactions, packets in cross layer protocol designs are impaired with both errors and packet loss, where the latter is also referred to as a packet erasure. In real-time applications, packet-level forward error correction (FEC) schemes are favorable candidates to enhance the performance of such protocols without retransmission. This paper proposes to use one type of code to recover...
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