Multiplex communications – Wide area network – Packet switching
Patent
1993-01-27
1995-04-11
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
375 99, H04J 1100
Patent
active
054065518
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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LeFloch, et al.: Digital Sound Broadcasting to Mobile Receivers: pp. 493-503: 1989 IEEE.
Kuroda Toru
Moriyama Shigeki
Saito Masafumi
Saito Tomohiro
Takada Masayuki
Hom Shick
Nippon Hoso Kyokai
Olms Douglas W.
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