Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-01-10
2006-01-10
Tse, Young T. (Department: 2637)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S222000, C370S208000, C370S210000
Reexamination Certificate
active
06985533
ABSTRACT:
A probability distribution transformer (110) in a multi-carrier modulation (MCM) transmitter (101) receives a MCM signal comprising data packets that represent amplitude values, where the amplitude values are characterized by a Gaussian probability density function. The probability distribution transformer (110), which is provided by a number of piecewise linear transforms, produce a transformed MCM signal comprising transformed data packets which represent transformed amplitude values, where the transformed amplitude values are characterized by a uniform probability density function. When transmitted, the transformed MCM signal results in reduced peak-to-average power ratio (PAPR). In a corresponding MCM receiver (102), a probability distribution inverter (180) inverts the transformation.
REFERENCES:
patent: 5937377 (1999-08-01), Hardiman et al.
patent: 6081502 (2000-06-01), Paneth et al.
patent: 6130918 (2000-10-01), Humphrey et al.
Abed-Meraim K.
Attallah Samir
Agency for Science Technology and Research
Chang Edith
Lawrence Y. D. Ho & Assoc.
Tse Young T.
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