Joint channel-physical layer network coding in multi-way wireless relay systems

Joint decoder for network and channel coded multi‐way relay systems with MPSK modulation

“…We consider a three-way relay system where nodes A, B and C are to exchange their information via a relay R as shown in Fig. 1 [15]. For simplicity, in order to present the proposed joint channel decoding and network coding algorithm, without loss of generality, we adopt the node pair selection scheme of [15] which selects nodes A and B to transmit their information first and then B and C to transmit their information second.…”

“…1 [15]. For simplicity, in order to present the proposed joint channel decoding and network coding algorithm, without loss of generality, we adopt the node pair selection scheme of [15] which selects nodes A and B to transmit their information first and then B and C to transmit their information second. We consider the joint decoder for the following two different communication models.…”

“…The vectors comprising of such groups of m bits are modulated using a MPSK modulation scheme to end up with a M-ary symbol vector. Finally, three such n-dimensional symbol vectors at nodes A, B and C are transmitted according to the scheme in [15] (Fig. 1).…”

“…However, the existing joint channel-network coding algorithms as in [8] cannot exploit this additional diversity. In [15], a new joint decoding algorithm was proposed to harness this time diversity in the joint decoding process to improve the error performance. However, the algorithm of [15] is limited to binary phase shift keying (BPSK) modulated information streams.…”

“…In [15], a new joint decoding algorithm was proposed to harness this time diversity in the joint decoding process to improve the error performance. However, the algorithm of [15] is limited to binary phase shift keying (BPSK) modulated information streams. To achieve high spectral efficiency, it is very common in modern standard communication systems to employ higher-order modulation schemes such as M-ary phase shift keying (MPSK) where multiple bits of information are carried in a single symbol.…”