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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Computation Of The Free Distance And Low Weight Distribution Of Turbo Codes With Convolutional Interleavers, Sina Vafi, Tadeusz A. Wysocki
Computation Of The Free Distance And Low Weight Distribution Of Turbo Codes With Convolutional Interleavers, Sina Vafi, Tadeusz A. Wysocki
Faculty of Informatics - Papers (Archive)
This work presents an algorithm for computation of the free distance parameter of turbo codes with a convolutional interleaver implemented to act as a block interleaver. Based on the properties of the interleaver and the algorithm applied, we can also determine the other low weights of turbo codes and this is useful in determining the performance of the error floor of turbo codes. For different turbo code structures, the relevant parameters have been computed. The error rate simulations confirm the algorithm results.
On Some Antenna Selection Techniques For Wireless Channels Utilizing Differential Space-Time Modulation, Le Chung Tran, Tadeusz A. Wysocki
On Some Antenna Selection Techniques For Wireless Channels Utilizing Differential Space-Time Modulation, Le Chung Tran, Tadeusz A. Wysocki
Faculty of Informatics - Papers (Archive)
The paper deals with antenna selection techniques for wireless channels utilizing differential space-time modulation. We propose here the restricted N-out-of-M antenna selection technique providing relatively good bit error performance, while using only one feedback bit for transmit diversity purpose. In addition, we also present an improved N-out-of-(N+1) antenna selection technique, which shortens the time required for processing feedback information. These techniques remarkably improve performance of wireless channels using differential detection.