Coding Schemes for User Cooperation in Low-Power Regimes
Guosen Yue, Xiaodong Wang, Zigui Yang, Anders Høst-Madsen · IEEE Transactions on Signal Processing · 2008
We consider the design of cooperation coding schemes for a two-user multiaccess channel (MAC). In particular, we consider two block Markov coding schemes, namely, the multiplexed coding and the superposition coding. Although the fully multiplexed (FMP) coding outperforms the superposition coding in theory, it is difficult to implement with practical error-correction codes. We, therefore, introduce a partially multiplexed (PMP) coding scheme for code rate R-2FER, and it provides a 10-dB gain over the noncooperative MAC. The multiplex coding using PMP-IRZH codes offers 1-dB gain over the superposition coding, and a 9.5-dB gain over noncooperative MAC at 10-2FER. Moreover, the PMP-IRZH coding performs only 0.5 dB away from the outage capacity of multiplexed coding in the low-power regime.