TY - JOUR
T1 - Method of signal synthesis in digital frequency modulation exciter
AU - Wang, Ai Hua
AU - Huang, Zhen Fei
PY - 2009/5
Y1 - 2009/5
N2 - The framework of digital frequency modulation (FM) exciter is proposed, and the realization scheme of stereo signal composition and frequency modulation is studied. Combined with analysis and algorithm simulation, the design of hardware platform based on FPGA+DDS structure is accomplished. The performance of the signal after demodulation is analyzed by modulation analyzer and stereo decoder. Test results indicated that, compared with the conventional analog realization scheme, the signal synthesis method in digital FM exciter had simple structure and less error, and each parameter can satisfy the requirement of synchronization in broadcasting system, demanding exat unison in frequency, phase and modulation degree.
AB - The framework of digital frequency modulation (FM) exciter is proposed, and the realization scheme of stereo signal composition and frequency modulation is studied. Combined with analysis and algorithm simulation, the design of hardware platform based on FPGA+DDS structure is accomplished. The performance of the signal after demodulation is analyzed by modulation analyzer and stereo decoder. Test results indicated that, compared with the conventional analog realization scheme, the signal synthesis method in digital FM exciter had simple structure and less error, and each parameter can satisfy the requirement of synchronization in broadcasting system, demanding exat unison in frequency, phase and modulation degree.
KW - Direct digital frequency synthesis
KW - Frequency modulation
KW - Frequency modulation exciter
KW - Stereo
UR - http://www.scopus.com/inward/record.url?scp=67650080950&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:67650080950
SN - 1001-0645
VL - 29
SP - 436
EP - 440
JO - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
JF - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
IS - 5
ER -