Analysis and power evaluation of window‐stopped parallel turbo decoding for LTE rate matching. Issue 9 (24th April 2018)

• Record Type: Journal Article
• Authors: Lin, Cheng‐Hung; Guo, Shu‐Wei; Ou, Li‐An
• Is Part Of: IET communications. Volume 12:Issue 9(2018)
• Page Start: 1148
• Page End: 1154
• Publication Date: 2018-04-24
• Subjects: automatic repeat request -- Long Term Evolution -- decoding -- turbo codes -- binary codes -- CMOS integrated circuits -- error correction codes; power evaluation -- LTE rate matching -- high‐speed data transmission -- LTE hybrid automatic repeat request scheme -- multiple transmission data -- single‐binary turbo code -- LTE RM -- window stopping rate -- kernel stopping rate -- high‐code‐rate decoding -- SB WS criterion -- implemented WS parallel turbo decoder -- Long‐term Evolution -- code rates -- window‐stopped parallel turbo decoding -- receiver -- WS criterion -- parallel SB WS turbo decoding -- codeword block decoding -- CMOS process -- size 90.0 nm; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2017.1078
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Long‐term evolution (LTE) adopts rate matching (RM) to reach high‐speed data transmission. According to the LTE hybrid automatic repeat request scheme, the receiver can correct multiple transmission data with distinct code rates. Here, the window‐stopped (WS) criterion is reinvestigated for the single‐binary (SB) turbo code in LTE RM. The parallel SB WS turbo decoding for LTE RM with distinct parameters is analysed in terms of window stopping rate, kernel stopping rate, and correcting performance. Experimental results reveal that the early termination technique does not work well for high‐code‐rate decoding. However, the SB WS criterion significantly achieves up to 19% window stopping for decoding large codeword blocks and 37% kernel stopping for decoding small codeword blocks. Moreover, the SB WS criterion is implemented within a parallel turbo decoder for LTE RM using a 90 nm CMOS process. The evaluation results show that the power dissipation of the implemented WS parallel turbo decoder can be significantly reduced by 17% with a 0.7% area overhead for high‐code‐rate decoding and high channel quality.