Title :
Optimum Bit Detection of Quadrature Amplitude Modulation in Self Correlated Gaussian Noise Channel
Author :
Mansoor, Atif Bin ; Mansoor, Awais ; Shah, Syed Ismail
Author_Institution :
Coll. of Aeronaut. Eng., Nat. Univ. of Sci. & Technol.
Abstract :
This paper discusses the optimum bit detection for coherent QAM (quadrature amplitude modulation) in the presence of colored Gaussian noise. We employ gray-mapping for constellations, and derive the log-likelihood ratio (LLR) for each bit forming the symbol. Using LLR, we derive the average bit error probability for individual bits. We further investigate the equalization methods under colored noise to facilitate optimum detection
Keywords :
Gaussian channels; Gaussian noise; correlation methods; equalisers; error statistics; maximum likelihood detection; quadrature amplitude modulation; Gaussian noise channel; bit error probability; gray-mapping; log-likelihood ratio; optimum bit detection; quadrature amplitude modulation; Additive noise; Additive white noise; Colored noise; Digital communication; Digital modulation; Error probability; Filters; Gaussian noise; Matrices; Quadrature amplitude modulation;
Conference_Titel :
9th International Multitopic Conference, IEEE INMIC 2005
Conference_Location :
Karachi
Print_ISBN :
0-7803-9429-1
Electronic_ISBN :
0-7803-9430-5
DOI :
10.1109/INMIC.2005.334450
