Xem 1-8 trên 8 kết quả Distance of code
  • • Tín hiệu truyền qua kênh truyền sẽ bị ảnh hưởng bởi nhiễu, can nhiễu, fading… là tín hiệu đầu thu bị sai. • Mã hóa kênh: dùng để bảo vệ dữ liệu không bị sai bằng cách thêm vào các bit dư thừa (redundancy). • Ý tưởng mã hóa kênh là gởi một chuỗi bit có khả năng sửa lỗi • Mã hóa kênh không làm giảm lỗi bit truyền mà chỉ làm giảm lỗi bit dữ liệu (bảng tin) • Có hai loại mã hóa kênh cơ bản là: Block codes và Convolutional codes...

    pdf36p hoangchung_dtvt 10-12-2012 72 25   Download

  • Signal detection in AWGN channels Minimum distance detector. Maximum likelihood. Average probability of symbol error. Union bound on error probability. Upper bound on error probability based on the minimum distance.ISI in the detection process due to the filtering effects of the system Overall equivalent system transfer function

    ppt30p doanhung_dtvtk10 24-03-2013 27 5   Download

  • Convolutional codes are linear. Therefore, the Hamming distance between any pair of code sequences corresponds to the Hamming distance between the allzero code sequence and some nonzero code sequence. The nonzero sequence of minimum Hamming weight diverges from the allzero path at some point and remerges with the allzero path at some later point

    ppt22p stevenhuynh87 08-12-2010 77 3   Download

  • My objective in writing this book was to produce a general, comprehensive textbook that treats all the essential core areas of cryptography. Although many books and monographs on cryptography have been written in recent years, the majority of them tend to address specialized areas of cryptography. On the other hand, many of the existing general textbooks have become out-of-date due to the rapid expansion of research in cryptography in the past 15 years.

    pdf574p vananhcun 02-05-2010 152 47   Download

  • Pandemic planning should consider the need for stockpiling of essential supplies. Discuss with key suppliers a plan for regular shipments in the event of shortages or disruptions in transportation systems. Shortages may occur because of disruptions in transportation systems or inability of suppliers to meet demands because of their own staff shortages. Canadian supplies travel long distances by truck, train and aircraft and are vulnerable to any disruption.

    pdf31p bi_ve_sau 05-02-2013 17 5   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học về toán học trên tạp chí toán học quốc tế đề tài: Graphs Associated with Codes of Covering Radius 1 and Minimum Distance 2...

    pdf17p thulanh6 15-09-2011 22 3   Download

  • For reliable communications to take place on a network, things like the physical method of signaling and the meaning of each signal or series of signals must be defined ahead of time. Create a simple physical network and agree on some basic rules for communication in order to send and receive data. This will be a digital network based on the American Standard Code for Information Interchange (ASCII). It will be similar to the old telegraph Morse code-based systems. In these older systems the only means of communicating over long distances was by sending a series of dots and dashes...

    pdf2p thanhha 27-08-2009 40 2   Download

  • Matched decoding is a technique that enables the efficient maximum-likelihood sequence estimation of convolutionally encoded PAM-transmission over ISI-channels. Recently, we have shown that the super-trellis of encoder and channel can be described with significantly fewer states without loss in Euclidean distance, by introducing a non-linear representation of the trellis. This paper extends the matched decoding concept to punctured convolutional codes and introduces a time-variant, non-linear trellis description.

    pdf5p kinhadthu 16-12-2015 6 2   Download

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