Title :
Implementation of Multi-Level Decision and De-Mapping Based on Nature-Coding Method in QAM Demodulation
Author :
Li, Zichuang ; Zhang, Meng ; Jiang, Zhixiang ; Wu, Jianhui
Author_Institution :
Nat. ASIC Syst. Eng. Res. Center, Southeast Univ., Nanjing
Abstract :
The optimum levels were used to decide the real levels for the data input with low error rate. And the real levels could be used to get during de-mapping. For the reason above, it is very important to find the optimum levels. The joint of two parts about one-dimension decision decided the decision bounds in two-dimension space, and the points were fixed to standard constellation. The codes used for the implementation may determine the complexity of hardware. So the nature-coding method was used to simplify the implementation of hardware.
Keywords :
decision theory; demodulation; modulation coding; quadrature amplitude modulation; QAM demodulation; decision bounds; multilevel decision; multilevel demapping; nature-coding method; one-dimension decision; two-dimension space; Additive noise; Additive white noise; Application specific integrated circuits; Circuit noise; Data engineering; Demodulation; Error analysis; Gaussian noise; Quadrature amplitude modulation; Systems engineering and theory;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.390
