OFDM送信機及びOFDM受信機

Japanese Patent JP4291674

B2

An OFDM transmitter (100) transmits an OFDM signal by a frame having a plurality of transmission symbol periods constituted of an effective symbol period for transmitting an information bit and a guard interval. The OFDM transmitter (100) includes a guard interval length decider (106) configured to decide a guard interval length in accordance with a feedback signal from an OFDM receiver; and a guard interval length changer configured to change a guard interval length in each transmission symbol period, in accordance with a decided guard interval length without changing a frame length. The guard interval length changer comprises an Inverse Discrete Fourier transformer configured to execute IDFT processing for a symbol to which the information bits are mapped, by using a DFT point number calculated in accordance with the decided guard interval length, and a guard interval adder configured to add the guard interval having the decided guard interval length to the effective symbol period for transmitting the symbol subjected to the IDFT processing.

JP2011155336	COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, AND PROCESSING METHOD
WO/2003/058901	METHOD AND SYSTEM FOR A PROGRAMMABLE CODE GENERATOR
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Hiromasa Fujii
Hiroto Suda

JP2003381708A

July 08, 2009

November 11, 2003

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NTT DoCoMo, Inc.

H04J11/00; H04L1/00; H04L27/26

JP2001268040A
JP2002374223A
JP2000165342A
JP2001136146A
JP2001313622A
JP2001036495A
JP2003152670A
JP2003023410A
JP9512156A
JP2002204405A
JP2001069114A
JP2000059330A
JP10327122A

Hidekazu Miyoshi
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi

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