Title:
TRANSMITTER, RECEIVER, TRANSMISSION SYSTEM, TRANSMISSION METHOD AND RECEPTION METHOD
Document Type and Number:
Japanese Patent JP3233626
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a transmission system that transmits data streams by using plural layers including layers A and B.
SOLUTION: Carriers, in a frequency relation orthogonal to each other by each symbol time in each of layers, are modulated by two data streams or more among a plurality of data streams. Each transmitter has one modulation section or more, that modulates the carrier by using each data stream respectively sent in layers A and B, while changing a signal point number assigned on a space diagram and also has an inverse Fourier transform section that applies inverse Fourier transformation to an output of the modulation section to convert it into a time axis. A 1st data stream of the layer A among data streams transmitted in the layer A includes demodulation information to demodulate a modulation signal modulating the data streams other than the 1st data stream in the layer A, and a 1st data stream of the layer B among data streams transmitted in the layer B includes demodulation information to demodulate a modulation signal modulating the data streams which are other than the 1st data stream in the layer B, and each transmitter transmits the data stream with a difference between the symbol time of the layer B and a symbol time of the layer A.
Inventors:
Mitsuaki Ohshima
Application Number:
JP2000383341A
Publication Date:
November 26, 2001
Filing Date:
September 24, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03M13/25; H03M13/35; H04B1/66; H04B14/04; H04H20/00; H04H20/06; H04J11/00; H04L1/00; H04L27/00; H04L27/02; H04L27/04; H04L27/18; H04L27/22; H04L27/26; H04L27/34; H04L27/36; H04L27/38; H04N5/38; H04N5/40; H04N5/44; H04N5/455; H04N5/46; H04N7/00; H04N7/015; H04N7/08; H04N7/081; H04N7/20; H04N11/24; H04N21/2662; H04N21/647; H04N21/845; (IPC1-7): H04J11/00; H04N5/38; H04N5/44; H04N7/08; H04N7/081
Domestic Patent References:
| JP5218978A |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)