Abstract

Although 4G (fourth generation) i.e. LTE (long term evolution) systems are now in use world-wide. But today’s 4G systems have some challenges left such as spectrum scarcity and energy efficiency. The prime objectives of near-by-future 5G (fifth generation) wireless communications are reliability, higher data rate, higher bandwidth, high spectrum efficiency, higher energy efficient and that too at lower latency. Channel coding tend to increase the reliability of the wireless communications system by adding extra bits in a controlled fashion and is considered to be most persuasive element of communication system. 4G LTE Turbo Codes have already been replaced by LDPC (low density parity check) Codes in many of the standards including mMTC (massive machine type communication), D2D (device to device communication) and URLLC (ultra-reliable low latency reliable communications). LDPC Codes and Polar Codes are securing much more observation because of their inherent advantages of excellent bit-error-rate performance, fast encoding and decoding procedures; which make them the strong contenders for 5G Channel Codes too. This paper provides the broad survey and comparison of the LDPC and Polar Codes along with their advantages and drawbacks which will aid in further improvement of the next generation wireless networks. In order to enlighten future research possibilities in this direction, issues addressed by distinct researchers have been explored too.

中文翻译：

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5G无线网络的信道编码技术研究

摘要

尽管4G（第四代）即LTE（长期演进）系统现在已在全球范围内使用。但是，当今的4G系统还存在一些挑战，例如频谱稀缺和能源效率。不久的将来的5G（第五代）无线通信的主要目标是可靠性，更高的数据速率，更高的带宽，更高的频谱效率，更高的能源效率以及更低的延迟。信道编码倾向于通过以受控方式添加额外的比特来增加无线通信系统的可靠性，并且被认为是通信系统中最具说服力的元素。在许多标准中，包括mMTC（大规模机器类型通信），4G LTE Turbo代码已被LDPC（低密度奇偶校验）代码取代。D2D（设备到设备的通信）和URLLC（超可靠的低延迟可靠通信）。由于LDPC码和Polar码具有出色的误码率性能，快速的编码和解码过程的固有优势，因此可以确保更多的观察。这也使它们成为5G通道代码的强大竞争者。本文提供了LDPC和Polar代码的广泛调查和比较，以及它们的优缺点，这将有助于进一步改进下一代无线网络。为了启发朝着这个方向的未来研究可能性，也探索了由不同研究人员解决的问题。快速的编码和解码程序；这也使它们成为5G通道代码的强大竞争者。本文提供了LDPC和Polar代码的广泛调查和比较，以及它们的优缺点，这将有助于进一步改进下一代无线网络。为了启发朝着这个方向的未来研究可能性，也探索了由不同研究人员解决的问题。快速的编码和解码程序；这也使它们成为5G通道代码的强大竞争者。本文提供了LDPC和Polar码的广泛调查和比较，以及它们的优缺点，这将有助于进一步改进下一代无线网络。为了启发朝着这个方向的未来研究可能性，也探索了由不同研究人员解决的问题。