.png){kind=icon}
Return
Compute-Forward Multiple Access (CFMA): Practical Implementations
.png){kind=icon}
OA
AI
DOI：10.1109/TCOMM.2018.2874240.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We present a practical strategy that aims to attain rate points on the dominant face of the multiple access channel capacity using a standard low complexity decoder. This technique is built upon recent theoretical developments of Zhu and Gastpar on compute-forward multiple access which achieves the capacity of the multiple access channel using a sequential decoder. We illustrate this strategy with off-the-shelf LDPC codes. In the first stage of decoding, the receiver first recovers a linear combination of the transmitted codewords using the sum-product algorithm (SPA). In the second stage, by using the recovered sum-of-codewords as side information, the receiver recovers one of the two codewords using a modified SPA, ultimately recovering both codewords. The main benefit of recovering the sum-of-codewords instead of the codeword itself is that it allows to attain points on the dominant face of the multiple access channel capacity without the need of rate-splitting or time sharing while maintaining a low complexity in the order of a standard point-to-point decoder. This property is also shown to be crucial for some applications, e.g., interference channels. For all the simulations with single-layer binary codes, our proposed practical strategy is shown to be within 1.7 dB of the theoretical limits, without explicit optimization on the off-the-self LDPC codes.
Keywords:
Compute-forward multiple access (CFMA)
multiple access channel
low density parity check codes (LDPC)
sequential decoding
sum-product algorithm
Journal
IF:
8.3
Papers:
1.2W
Citations:
3.6W
Organization
View more organizations
Cited Papers
ShareSaveShareSaveShareSaveNewcastle disease virus (NDV) recombinant expressing Marek’s disease virus (MDV) glycoprotein B significantly protects chickens against MDV and NDV challenges.png)
VaccineOAAI
VaccineIF0
OAAIShareSave View more