Abstract
In this paper, we consider K-user Y channels where K users simultaneously exchange messages with each other via an intermediate relay. Degrees of freedom (DOF) of Y channels with multiple antennas is not known in general. Investigation of the feasibility conditions of signal space alignment for network coding is an initial step for addressing this open problem. We verify that when user i with M i antennas sends K-1 independent messages to the other users through a relay with N antennas and each message achieves the DOF of d, the total DOF of dK(K-1) is attained if M i d(K-1), N≥ dK(K-1)}/2 and N < min{ i+M j-d
| Original language | English |
|---|---|
| Article number | 6144762 |
| Pages (from-to) | 1210-1219 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 11 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2012 Mar 1 |
Keywords
- Degrees of freedom
- interference alignment
- network coding
- Y channels
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Applied Mathematics
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Cite this
Lee, K., Lee, N., & Lee, I. (2012). Achievable degrees of freedom on K-user y channels. IEEE Transactions on Wireless Communications, 11(3), 1210-1219. [6144762]. https://doi.org/10.1109/TWC.2012.012712.111194