Title :
Comparison analysis of uncoded and trellis-coded multilevel QAM radio systems
Author :
Bogenfeld, E. ; Rupprecht, W. ; Metzger, K. ; Valentin, R.
Author_Institution :
Inst. of Commun. Eng., Kaiserslautern Univ., Germany
Abstract :
The digital radio channel is investigated for uncoded and trellis-coded data transmission. The receiver uses a detector having memory. The Viterbi algorithm is optimum for the search of the most likely transmitted sequence. The authors apply a suboptimum procedure called the M-algorithm (MA). The MA uses a sorting breadth-first strategy and pursues only the M most likely data sequences. Simulation results are presented for uncoded/coded 16-quadrature amplitude modulation (QAM)/32-CROSS and 64-QAM/128-CROSS modulation types. The bit error rate and the signature were taken as the evaluation criteria
Keywords :
amplitude modulation; digital radio systems; error statistics; intersymbol interference; microwave links; trellis codes; 16-QAM/32-CROSS; 64-QAM/128-CROSS; M-algorithm; bit error rate; breadth-first strategy; digital radio channel; digital radio relay systems; intersymbol interference; microwave links; multilevel QAM radio systems; signature; suboptimum procedure; trellis-coded data transmission; uncoded data transmission; Amplitude modulation; Bit error rate; Data communication; Detectors; Digital communication; Modulation coding; Quadrature amplitude modulation; Receivers; Sorting; Viterbi algorithm;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188672
