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Registered METHOD AND APPARATUS FOR DECOMPOSING RECEIVED SYMBOL SIGNAL MODULATED WITH BIT REFLECTED GRAY CODE INTO BIT INFORMATION
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METHOD AND APPARATUS FOR DECOMPOSING RECEIVED SYMBOL SIGNAL MODULATED WITH BIT REFLECTED GRAY CODE INTO BIT INFORMATION
- Inventors
- Kim Daeho, Bang Young Jo, Kim Jun-Woo, Bahng Seungjae, 현광민, Chang Wahn Yu, Park Hyeong Sook, 박윤옥, 윤동원, Sohn Kyung Yeol
- Application No.
- 12734984 (2008.09.01)
- Publication No.
- 20110103521 (2011.05.05)
- Registration No.
- 8559566 (2013.10.15)
- Country
- UNITED STATES
- Abstract
- Disclosed is a method and apparatus for composing a received symbol signal modulated with a bit reflected Gray code into bit information. According to an embodiment of the present invention, a positive integer of the received symbol signal having bits is assigned according to the Gray mapping rule, and a sign is determined. A value that is indicative of an arrangement of the bits constituting the received symbol signal is calculated. A boundary value in at least one bit group consisting of the bits constituting the received symbol signal is acquired, and a difference from an absolute value of the received symbol signal is calculated. The received symbol signal is converted into information per bit using a value of the received symbol signal based on the positive integer and the determined sign, the value that is indicative of the bit arrangement, and the difference from the absolute value. Therefore, it is possible to reduce complexity in bitwise decomposition for an iterative decoder inevitably used in a receiver.
- KSP Keywords
- Absolute value, Gray mapping, Iterative decoder, Mapping rule, boundary value, gray code, signal based