부산대학교 도서관

In todays world, the demand for Mobile Internet is increasing and the Internet of Things poses a challenging requirement for 5G wireless communications. Turbo Codes and Tail Bitting Convolution Codes (TBCC) have proven to be efficient for LTE communication. But these codes have failed to satisfy the conditions defined for 5G Communications. In 5G, we require advanced error correction techniques for channel coding. To fulfill 5G communications requirements, we use LDPC and Polar codes for error correction. In 5G NR (New Radio) LDPC codes used for the data channel and control channel Polar Codes are used. We get high Coding gain for this code. It has several features such as high throughput, low power dissipation, and low latency. We describe encoding and decoding methods of LDPC and Polar Codes. They use two types of Base matrices of 5G NR for this code. Polar codes depend on channel polarization and are the first code that has achieved Shannon channel capacity. Polar codes have wide applications in Information theory. Quasi Cyclic LDPC code, Irregular Repeat-Accumulate (IRA) code, Spatially Coupled LDPC (SP-LDPC), NBLDPC-Polar Codes described. For 5G Standard this code plays an important role in Channel Coding.