Decoding Latency of LDPC Codes in 5G NR

Abstract

Fifth generation (5G) new radio (NR) is the next generation of mobile network beyond the fourth generation (4G) long term evolution (LTE). In order to meet high throughput and low latency requirements, low-density parity-check (LDPC) codes are adopted by the 5G NR standard for data channels. In 5G NR, the decoder provided to implement the peak throughput requirement may not be able to decode transport blocks over the same radio resources in the same time duration. In this paper, we analyze the decoding latency of LDPC codes in a typical scenario from a system point of view. The analysis can be used to guide the design of the decoder.