Pulse or digital communications – Receivers – Automatic frequency control
Patent
1998-05-06
2000-05-23
Vo, Don N.
Pulse or digital communications
Receivers
Automatic frequency control
375350, 375354, 4551922, H04L 2706
Patent
active
06067332&
ABSTRACT:
A digital audio broadcast receiver searches for a receivable digital audio broadcast signal by first searching for a signal, having at least a predetermined power level, in which frame synchronization symbols can be detected. This stage of the search is made by searching a known frequency grid, or by scanning in steps approximately equal to the bandwidth of the digital audio broadcast signal. After frame synchronization symbols have been detected, the receiver attempts to find the center frequency of the received signal, changing the receiving frequency in steps less than the bandwidth of the digital audio broadcast signal, if necessary. A prompt indication that a receivable digital audio broadcast signal has been found is given when frame synchronization symbols are detected, or when the center frequency is found.
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Ishida Masayuki
Morita Masakazu
Ohkubo Tadatoshi
Taura Ken-ichi
Tsujishita Masahiro
Mitsubishi Denki & Kabushiki Kaisha
Phu Phuong
Vo Don N.
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