Network and Channel Coded Cooperation Algorithms for Cellular Networks

Abstract

The paper analyzes the performances provided by two algorithms that combine the network and distributed channel coding in cooperative schemes with a relay-node serving two mobile stations, placed symmetrically and asymmetrically vs. the base-station. The analysis is performed in scenarios that consider error-affected mobile -relay node channels. It also proposes a low complexity hybrid coded cooperation algorithm that employs adaptively the cooperative or the non-cooperative transmissions. The selection of the cooperation mode is based on the bit error probability estimation on the mobile -relay node channels.

Optimal and low-complexity iterative joint network/channel decoding for the multiple-access relay channel

“…In [6], [7], it has been shown that JNCD can improve the performance of canonical two-way and multiple-access relay channels if compared to conventional distributed turbo coding and separate network and channel decoding. Recent research works on JNCD have confirmed its potential gains with respect to layered schemes (see, e.g., [2], [9]- [11] and references therein).…”

“…First, let us start by summarizing the main working principle of the basic conventional JNCD (see, e.g., [2], [6], [7], [9]- [11]). A sketched block-diagram of the decoder is shown in Fig.…”

“…Second, we propose a sub-optimal low-complexity iterative JNCD scheme, which is based on decoding principles of serial concatenated codes [14]. With respect to state-of-theart schemes for iterative JNCD [2], [6], [7], [9]- [11], our solution is based on propagating, between the blocks, extrinsic information of the coded bits, rather than extrinsic information of the information bits. This is achieved by providing a scheme that, as opposed to current solutions, starts the iterative decoding with the network code.…”

Multiple-access relaying with network coding: iterative network/channel decoding with imperfect CSI

“…The idea behind JNCD is the exploitation of the inherent redundancy of network and channel codes. In [7,8], it has been shown that, compared to conventional distributed turbo coding and separate network and channel decoding, JNCD can improve the performance of canonical two-way and multiple-access relay channels. http://asp.eurasipjournals.com/content/2013/1/170…”