tailieunhanh - Báo cáo hóa học: " Research Article Censored Distributed Space-Time Coding for Wireless Sensor Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Censored Distributed Space-Time Coding for Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 127689 9 pages doi 2008 127689 Research Article Censored Distributed Space-Time Coding for Wireless Sensor Networks S. Yiu and R. Schober Department of Electrical and Computer Engineering The University of British Columbia 2356 Main Mall Vancouver BC Canada V6T1Z4 Correspondence should be addressed to S. Yiu simony@ Received 22 April 2007 Accepted 3 August 2007 Recommended by George K. Karagiannidis We consider the application of distributed space-time coding in wireless sensor networks WSNs . In particular sensors use a common noncoherent distributed space-time block code DSTBC to forward their local decisions to the fusion center FC which makes the final decision. We show that the performance of distributed space-time coding is negatively affected by erroneous sensor decisions caused by observation noise. To overcome this problem of error propagation we introduce censored distributed space-time coding where only reliable decisions are forwarded to the FC. The optimum noncoherent maximum-likelihood and a low-complexity suboptimum generalized likelihood ratio test GLRT FC decision rules are derived and the performance of the GLRT decision rule is analyzed. Based on this performance analysis we derive a gradient algorithm for optimization of the local decision censoring threshold. Numerical and simulation results show the effectiveness of the proposed censoring scheme making distributed space-time coding a prime candidate for signaling in WSNs. Copyright 2008 S. Yiu and R. Schober. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION In recent years wireless sensor networks WSNs have been gaining popularity in a wide range of military and civilian applications such as .

TÀI LIỆU LIÊN QUAN
TÀI LIỆU MỚI ĐĂNG
19    228    0    18-04-2024
23    153    0    18-04-2024
41    114    0    18-04-2024
173    100    0    18-04-2024
14    107    0    18-04-2024
40    96    0    18-04-2024
8    104    0    18-04-2024
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.