Phân tích so sánh kỹ thuật ước lượng kênh LS và MMSE trong hệ thống OFDM dưới nước
Từ khóa:
Ước lượng kênh, OFDM, UWA-OFDM, LS, MMSETóm tắt
Bài báo trình bày các phương pháp tiêu biểu nâng cao độ chính xác ước lượng kênh trong hệ thống OFDM dưới nước. Việc truyền tin trong hệ thống thông tin thủy âm bị ảnh hưởng nhiều bởi các yếu tố môi trường, chất lượng hệ thống OFDM dưới nước phụ thuộc nhiều vào thông tin trạng thái kênh truyền. Bài báo phân tích kỹ thuật ước lượng kênh theo hai thuật toán LS và MMSE để đánh giá hiệu quả khả năng sử dụng cho hệ thống thông tin liên lạc dưới nước. Kết quả cho thấy, thuật toán MMSE tốt hơn thuật toán LS với yêu cầu thông tin về trạng thái kênh.
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