Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Access Analog Fountain Codes   In this paper, we propose a novel rateless multiple access scheme based on
the recently proposed capacity-approaching analog fountain code (AFC). We show
that the multiple access process will create an equivalent analog fountain
code, referred to as the multiple access analog fountain code (MA-AFC), at the
destination. Thus, the standard belief propagation (BP) decoder can be
effectively used to jointly decode all the users. We further analyse the
asymptotic performance of the BP decoder by using a density evolution approach
and show that the average log-likelihood ratio (LLR) of each user's information
symbol is proportional to its transmit signal to noise ratio (SNR), when all
the users utilize the same AFC code. Simulation results show that the proposed
scheme can approach the sum-rate capacity of the Gaussian multiple access
channel in a wide range of signal to noise ratios.

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The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics