Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing
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United States of America Patent
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Apr 11, 1995
Grant Date -
N/A
app pub date -
Jan 27, 1993
filing date -
Jan 31, 1992
priority date (Note) -
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Abstract
A digital signal transmission using OFDM modulation scheme in which the valid transmission data can be reproduced without requiring a recovery of the carriers at a receiver side. On a transmitter side, the transmission data sequence in which predetermined reference data for each carrier are placed among valid transmission data is modulated according to an orthogonal frequency division multiplexing (OFDM) modulation scheme using a plurality of carriers and obtained OFDM transmission signals are transmitted. On a receiver side, the received OFDM transmission signals are demodulated to obtain received data sequence containing valid received data and received reference data, and the valid transmission data are estimated from the received data sequence according to the valid received data, the received reference data, and the predetermined reference data for each carrier.
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