Abstract
In this paper, a rateless coding scheme with enhanced unequal error protection (UEP) property is proposed by concatenating the systematic polar code (SPC) and spinal code, where SPC is used as the outer code and spinal code is the inner code. The novel concatenated polar-spinal coding scheme is designed to provide an improved UEP for the information with different reliability requirements. At the receiver, a tail CRC-aided Bubble decoding is proposed to improve the performance of spinal codes effectively. Moreover, the rateless transmission control is designed carefully for the time-varying channels. The total complexity of joint concatenated decoding process is reduced. Simulation and analysis verify that the novel rateless polar-spinal coding scheme can provide better UEP performance for the information of each importance level in contrast to some existing UEP rateless coding schemes.
Highlights
For many new radio scenarios such as 5G and Internet of Things (IoT) applications, different classes of data have various reliability requirements
PROPOSED unequal error protection (UEP) RATELESS POLAR-SPINAL CODING AND DECODING SCHEMES we propose a novel concatenated UEP coding scheme based on systematic polar code (SPC) and rateless spinal codes
The main contributions are that i) in the practical applications, the cyclic redundancy check (CRC) check bits concatenated to each importance level are employed to verify whether the information is recovered or not; ii) they are utilized to choose the survival path when the CA-SCL decoding (CA-SD) of outer SPC is required; iii) the tail-CRC ensures that both more important bits (MIB) and less important bits (LIB) can obtain a performance improvement
Summary
For many new radio scenarios such as 5G and Internet of Things (IoT) applications, different classes of data have various reliability requirements. A novel concatenated polar-spinal coding scheme is designed to achieve a goal of better UEP for the information having different reliability requirements. At the receiver, since the error-prone part in spinal coding always locates in the last few bits, a tail cyclic redundancy check (CRC)-aided Bubble decoding (CA-BD) is proposed to improve the performance of spinal codes effectively. It contributes to an enhanced UEP for all importance levels without the degraded performance of the lowest importance level.
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