Multiple Accessing for the Collision Channel Without Feedback |
| |
Authors: | Hui J |
| |
Affiliation: | Bell Comm. Res., Murray Hill, NJ, USA; |
| |
Abstract: | We consider asynchronous multiple accessing without feedback over the collision channel. Redundant coding is used to overcome user interference which causes erasures for collided packets. The channel has a sum capacity of e-1and a sum cutoff rate of 0.295. The best codes are long constraint length rate 1/3 convolutional encoders which achieve a sum throughput up to the sum cutoff rate using an easy-to-implement forward search decoding algorithm. In the presence of additive Gaussian noise, the same redundant coding can save, at hardly any extra cost, about 6 dB of signal-to-noise ratio. |
| |
Keywords: | |
|
|