Cảm Biến Kênh Nén Sử Dụng Các Subcarrier Null Chỉ Định Trong Các Hệ Thống OFDM Không Dùng Một Hướng

Wireless Personal Communications - Tập 79 - Trang 1635-1645 - 2014
Jong-Ho Lee1, Yong-Hwa Kim2
1Department of Electronic Engineering, Gachon University, Seongnam, Korea
2Department of Electronic Engineering, Myongji University, Yongin, Korea

Tóm tắt

Trong bài báo này, chúng tôi xem xét việc hủy bỏ can thiệp tự thân bằng số trong các hệ thống truyền không dây sử dụng phân chia tần số vuông góc (OFDM) làm việc song công. Do việc hủy bỏ số bị ảnh hưởng mạnh bởi độ chính xác của ước lượng các kênh can thiệp tự thân, vốn có xu hướng thưa thớt, chúng tôi đề xuất một phương pháp ước lượng kênh dựa trên cảm biến nén sử dụng các subcarrier null chỉ định. Các kết quả số của chúng tôi cho thấy rằng, bằng cách cung cấp các ước lượng chính xác hơn về các kênh can thiệp tự thân, phương pháp đề xuất vượt trội hơn so với các phương pháp bình phương tối thiểu truyền thống về khả năng giảm thiểu can thiệp tự thân.

Từ khóa

#hủy bỏ số #can thiệp tự thân #OFDM #cảm biến nén #subcarrier null

Tài liệu tham khảo

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