Title :
Decision directed coherent detection of 16-QAM on fading channels
Author :
Nakhjiri, Madjid Faghih ; Svensson, Arne
Author_Institution :
Dept. of Inf. Theory, Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
A coherent detector for differential 16-QAM on Rayleigh fading channels is presented. The phase and amplitude reference needed for the detection are provided by an MMSE estimate of the fading process. The estimation is assisted by previous decisions and implemented by a FIR-filter. The bit error performance of the detector proposed is analysed. According to the analysis, the proposed detector exhibits only a performance degradation of 8 dB compared to an ideal coherent detector for 16-QAM at BER of 1% for a normalized Doppler frequency of 0.05.
Keywords :
fading; 16-QAM; FIR-filter; MMSE estimate; Rayleigh fading channels; amplitude reference; bit error; coherent detector; decision directed coherent detection; differential 16-QAM; performance degradation; phase reference; Amplitude estimation; Bit error rate; Degradation; Detectors; Fading; Frequency; Performance analysis; Phase detection; Phase estimation; Rayleigh channels;
Conference_Titel :
Wireless Communication System Symposium, 1995., IEEE
DOI :
10.1109/WCSS.1995.588495
