Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-10-11
2010-02-16
Payne, David C (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
07664192
ABSTRACT:
A transmitter for minimizing a PAPR in OFDM communication system. The transmitter includes: a precoder for coding input symbols so that a signal rotation is generated, and generating a complex vector including the coded symbols; an encoder for performing a frequency-space mapping for the symbols generated as the complex vector according to a predetermined scheme; a random mapper for randomly mapping the symbols for which the frequency-space mapping has been performed on a frequency plane through at least one transmit antenna; an Inverse Fast Fourier Transform (IFFT) unit for performing an IFFT for the symbols for which the frequency-space mapping has been performed; and a gradient algorithm unit for receiving IFFTed signals from the IFFT unit and reducing the PAPR.
REFERENCES:
patent: 2006/0078066 (2006-04-01), Yun et al.
IEEE 802.16 Broadband Wireless Access Working group, Sung-Eun Park et al.
Sung-Eun Park et al., Tone Reservation Method for PAPR Reduction Scheme, Oct. 31, 2003.
Chae Chan-Byoung
Jeong Hong-Sil
Joo Pan-Yuh
Kim Jae-Yoel
Ko Kyun-Byoung
Payne David C
Samsung Electronics Co,. Ltd
Shah Tanmay K
The Farrell Law Firm, LLP
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