Communications system, transmitter, receiver, and...

Details Communications system, transmitter, receiver, and... Communications system, transmitter, receiver, and...

2007-05-29

2010-12-14

Vu, Huy D (Department: 2461)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C370S343000, C370S252000

Reexamination Certificate

active

07852956

ABSTRACT:
Sample signals P0(0) to P0(N−1) are input for each symbol of a multiplexed transmission sample or transmission chip. The sum of a particular pair of sample signals (for example, a pair of P0(0) and P0(N/2)) is obtained by an adder for each pair of sample signals, and a signal the power of which is halved by attenuating the sum with an attenuator is generated and output as a dispersion signal P1(N/2). Additionally, a difference between the pair of the sample signals is obtained by a subtractor, and a signal the power of which is halved by attenuating the difference with an attenuator is generated and output as a dispersion signal P1(0). The dispersion signals P1(0) and P1(N/2) are made to respectively correspond to first and second subsymbols, which are configured by partitioning the symbol.

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Xiao Huang et al., “Reduction in Papr of OFDM System Using a Revised Compandi”, pp. 62-66 (Nov. 2002).
Y.J. Kou et al., “New Peak-to-Average Power-Ratio Reduction Algorithms for OFDM Systems Using Constellation Extension”, pp. 514-517 (Aug. 2005).

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