1037443-A2 is referenced by 11 patents and cites 4 patents.

An OFDM (Orthogonal Frequency Division Multiplexing) modulator of the present invention includes a polar coordinates converter to which real axis data and imaginary axis data output from a discrete inverse Fourier transformer are input. The converter converts the two kinds of input data to amplitude data to phase data. A carrier wave is subjected to phase modulation using the phase data and then input to a power amplifier as an input RF (Radio Frequency) signal. The power amplifier is implemented by a C class power amplifier having inherently high power utilization efficiency. The output level of the power amplifier is controlled in accordance with the amplitude data.

Ofdm modulator and digital broadcasting apparatus using the same
Application Number
EP20000105711 20000317
Publication Number
1037443 (A2)
Application Date
March 17, 2000
Publication Date
September 20, 2000
Takeda Haruo
Mori Nobuyuki
Nippon Electric Co
H03C 05/00
H04L 27/36
H04L 27/34
H04L 27/26
H04J 11/00
H04L 27/36
H04L 27/26
H04J 11/00
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