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Enhanced Cellular Coverage and Throughput Using Rateless Codes
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DOI：10.1109/TCOMM.2017.2676096.png)
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Abstract
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Rateless codes have been shown to provide robust error correction over a wide range of binary and noisy channels. Using a stochastic geometry model, this paper studies the performance of rateless codes in the cellular downlink and compares it with the performance of fixed-rate codes. For the case of Rayleigh fading, an accurate approximation is proposed for the distribution of the packet transmission time of K-bit information packets using rateless codes. The two types of channel coding schemes are compared by evaluating the typical user and per-user success probability and the rate. Based on both the analytical results and simulations, the paper shows that rateless coding provides a significant throughput gain relative to fixed-rate coding. Moreover, the benefit is not restricted to the typical user but applies to all users in the cellular network.
Keywords:
Rateless codes
fixed-rate codes
5G cellular downlink
stochastic geometry
PPP
PHY layer
delay and throughput
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