Codes for T-User Asymmetric Multiple-Access Channel with Independent Sources
Codes for T-User Asymmetric Multiple-Access Channel with Independent Sources
复制标题
具有独立源的 T 用户非对称多址信道的代码
DOI：
10.1109/itw.2017.8277982
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Jun Cheng
中科院分区：
文献类型：
--
作者：
Shan Lu;Hiroshi Kamabe;and Jun Cheng
非对称多址信道（AMAC）是一种多址信道，其中一部分用户可以观察到其他用户的消息。首先，我们提出了三个2用户唯一可解码（UD）码的两用户AMAC，这是实现更高的和速率比以前的2用户码。然后，我们考虑T用户噪声AMAC的多用户纠错码。一个定理表明，给定一个Ta用户δ a可译码的k元码A和一个Td子集δ a可译码的差集D，利用Hadamard矩阵可以得到一个更大的纠错T用户码C.为了便于实际构造，我们在2-用户UD码的基础上给出了2-用户差集，并得到了多用户AMAC的多用户纠错码。所提出的纠错码具有随着码长的增加而增加的和率和纠错能力。
An asymmetric multiple access channel (AMAC) is a multiple-access channel where a portion of the users can observe the messages of other users. We first propose three 2-user uniquely decodable (UD) codes for two-user AMAC, which are shown to achieve higher sum-rate than the previous 2-user codes. Then, we consider multiuser error correcting codes for T-user noisy AMAC. A theorem shows that given a Ta-user δa-decodable k-ary code A and a Td-subset δa-decodable difference set D a priori, a larger error-correcting T-user code C is obtained by Hadamard matrices. For practical construction, we give 2-user difference sets based on the 2-user UD codes, and obtain multiuser correcting codes for multiuser AMAC. The proposed correcting codes have increasing sum-rate and error-correcting capability with an increasing code length.