Transmitting apparatus and method and provision medium

Details Transmitting apparatus and method and provision medium Transmitting apparatus and method and provision medium

2007-01-02

2007-01-02

Nguyen, Chau (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S350000

Reexamination Certificate

active

09936337

ABSTRACT:
Influence from an adjacent signal is prevented even if a guard band is not provided.A phase comparison unit21compares a reference window signal input to a PLL circuit4and a window signal supplied from a frequency division circuit22and outputs the comparison result to an LPF23. The LPF23extracts a low frequency component from the input signal and outputs the same to a voltage controlled oscillator24. The signal output from the voltage controlled oscillator24is supplied as a clock to units of an OFDM modulation circuit2and, at the same time, supplied to the frequency division circuit22. The frequency division circuit22divides the frequency of the supplied signal to thereby generate a new window signal and supplies the same to an IFFT unit13. Further, the generated window signal is supplied to a PLL circuit5. The PLL circuit5generates a clock for controlling a frequency modulation circuit3based on the supplied window signal.

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