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| The Recursive Calculation Method of Bit Soft Output |
| Pan Wen; You Xiao-hu |
| National Mobil Communications Lab, Southeast University, Nanjing 210096, China |
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Abstract In this paper, a new PAM (QAM) constellation is recursively designed by lower order modulation constellation arrangement, and the constellation is still Gray map. The every higher order modulation bit soft output can be calculated by bit soft output of lower order modulation. The soft output of any higher order modulation can be calculated by calculating the soft output of binary modulation. It can decrease complexity. The simulation shows its correctness.
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Received: 08 November 2004
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2006, Vol. 28 
