TRUYỀN NĂNG LƯỢNG KHÔNG DÂY DỰA TRÊN ĐỊNH DẠNG BÚP SÓNG CỘNG TÁC CÓ XEM XÉT TRIỆT NHIỄU

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Tác giả: Manh Kha Hoang, Van Dao Hoang, Xuan Thuc Kieu, Ngoc An Nguyen, Truong Hieu Nguyen, Van Cuong Nguyen, Van Luyen Tong

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2023

Mô tả vật lý: tr.208

Bộ sưu tập: Báo, Tạp chí

ID: 338592

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Mục tiêu của kỹ thuật truyền thông dữ liệu tiết kiệm năng lượng được gọi là định dạng búp sóngcộng tác (CB: Collaborative Beamforming) là tăng phạm vi truyền dẫn trong mạng bằng cách bức xạcông suất từ một cụm nút cảm biến (nút) theo hướng của các trạm gốc hoặc điểm truy cập mongmuốn (BS/APs: Base Stations/Access Points). Búp sóng chính của giản đồ bức xạ mẫu CB độc lập vớicác vị trí nút biến cụ thể
tuy nhiên, giản đồ bức xạ trung bình CB thể hiện một đặc tính xác định. Mặtkhác, giản đồ bức xạ mẫu do CB tạo ra cho một cụm gồm nhiều nút cộng tác thể hiện các búp sóngphụ mà chúng phụ thuộc nhiều vào các vị trí nút cụ thể. Bài báo này trình bày một giải pháp điềukhiển búp sóng phụ hay triệt nhiễu đơn giản mà phù hợp với CB trong mạng cảm biến không dây.Giải pháp này nhằm mục đích giảm nhiễu tại các BS/APs không mong muốn trong khi vẫn duy trì búpsóng chính về các BS/APs mong muốn. Tính hiệu quả của giải pháp đề xuất được đánh giá qua khảnăng triệt nhiễu và số lần thử nghiệm tìm kiếm trung bình cần thiết để chọn các nút cộng tác. Kết quảmô phỏng cho thấy rằng khi giải pháp lựa chọn nút được sử dụng với CB, nhiễu có thể được giảmđáng kể và giải pháp này cũng phù hợp chặt chẽ với các kết quả lý thuyết.The goal of the energy-efficient data communication technique known as collaborativebeamforming (CB) is to extend the network's transmission range by radiating the power of a clusterof sensor nodes in the direction of the desired base stations or access points (BSs/APs). The main lobeof the CB sample beampattern is independent of the particular node positions
however, the CBaverage pattern exhibits a deterministic characteristic. The sample beam pattern produced by the CBfor a cluster of finitely many collaborative nodes, on the other hand, exhibits sidelobes that are highlydependent on the particular node positions. This paper demonstrates a simple sidelobe control orinterference suppression approach that is appropriate for CB in wireless sensor networks. Thisapproach aims to reduce interferences at unwanted BSs/APs while maintaining the main lobesteering the desired BSs/APs. The proposed approach’s performance is evaluated in terms ofinterference suppression ability and the average number of search trials required to selectcollaborative nodes. Simulation results show that when node selection is employed with CB,interferences can be significantly reduced, and they also agree closely with theoretical results.

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