Multiplex communications – Generalized orthogonal or special mathematical techniques
Reexamination Certificate
2011-04-19
2011-04-19
Juntima, Nittaya (Department: 2462)
Multiplex communications
Generalized orthogonal or special mathematical techniques
C370S343000, C455S101000, C375S260000
Reexamination Certificate
active
07929407
ABSTRACT:
Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
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Jia Ming
Ma Jianglei
Tong Wen
Xu Hua
Zhang Hang
Juntima Nittaya
Nortel Networks Limited
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