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Coding for S-user vector adder channel

The article addresses the problem of constructing a multiple access system for a multi-user vector adder channel (the channel with intensity information or the B-channel). To solve the problem we propose an asynchronous1 coding scheme employing a single-user detection. For the resulting multiple access system we estimate the probability of wrong decoding. Based on this result an asymptotic lower estimate of the relative group rate is derived. The comparisons to the B-channel capacity and to the lower estimate for the A-channel are done.