GIẢI PHÁP TÍNH TOÁN TRỌNG SỐ PHÂN CỰC MỚI TRONG THIẾT KẾ MÃ PHÂN CỰC

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Tác giả: Đức Thuận Đàm, Tiến Đệ Lại, Xuân Nghĩa Phạm

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Journal of Science and Technique: Section on Information and Communication Technology, 2023

Mô tả vật lý: tr.36

Bộ sưu tập: Metadata

ID: 372069

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Mã phân cực được Arikan đề xuất năm 2009 dựa vào nguyên lý phân cực kênh đã được chứng minh đạt dung lượng kênh đầu vào nhị phân đối xứng rời rạc. Mã phân cực cũng đã được 3GPP chọn làm mã sửa lỗi trong hệ thống thông tin di động thứ 5 (5G New Radio - 5G NR) với độ dài từ mã tối đa 1024 bit. Việc thiết kế mã dựa vào độ tin cậy của các kênh tổng hợp đã được nghiên cứu với nhiều phương pháp khác nhau với mục đích thỏa mãn những yêu cầu trong ứng dụng của 5G NR. Xuất phát từ yêu cầu với thiết kế mã phân cực là dễ thực thi, độ phức tạp giải mã thấp và duy trì hiệu năng sửa lỗi tốt, bài báo đã đề xuất một phương pháp thiết kế mã phân cực bằng cách xác định chuỗi chỉ số tin cậy (Reliability Sequence - RS) kênh tổng hợp dựa trên phương pháp trọng số phân cực mới (Improved Polarization Weights - IPW). Kết quả mô phỏng cho thấy hiệu suất sửa lỗi của mã thiết kế theo IPW tốt hơn các cấu trúc mã thiết kế theo (Polarization Weights - PW) và cấu trúc mã của 5G NR tại vùng tỉ lệ lỗi bit nhỏ, đặc biệt phương pháp này còn xây dựng chuỗi RS cho từ mã dài 2048 bit trong khi mới chỉ có chuỗi RS cho bộ mã dài 1024 bit cho chuẩn 5G NR.Polar codes proposed by Arikan based on channel polarization have been proven to achieve Symmetric Binary-Discrete Input Memoryless Channels capacity. 3GPP has also chosen the Polar codes as the error correction code in the fifth mobile communication system (5G New Radio - 5G NR) with a maximum codeword length of 1024 bits. The design of the code based on the reliability of the synthetic channels has been researched with many different methods to satisfy the requirements demanded in the application of 5G NR. The Polar codes design requirements are ease of implementation, low decoding complexity, and high performance in error correction. This paper has proposed a method of designing Polar codes by determining a synthetic channels reliability index sequence based on the Polarization Weights (PW) method called the Improved Polarization Weights (IPW) method. The simulation results show that the error correction performance of the code designed according to IPW is better than the code structure selected for 5G NR and designed according to the original PW method.

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