Title:
COMMUNICATION SYSTEM, TRANSMITTER, AND RECEIVER
Document Type and Number:
Japanese Patent JP2015186246
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make the receiver side appropriately recognize/identify, with simple processing, a transmission mode selected adaptively according to a situation of deterioration in a radio propagation path.SOLUTION: A transmitter 101 comprises at least: a multicarrier modulation unit 106; a transmission mode setting unit 102; a mode tone generation unit 109; and an addition unit 107. The addition unit 107 adds a mode identification tone signal generated, according to output of the mode setting unit 102, by the mode tone generation unit 109 to transmission data modulated by the multicarrier modulation unit 106. A receiver 111 comprises at least: a multicarrier separation unit 114; a mode tone analysis unit 115; and a data demodulation unit 116. The mode tone analysis unit 115 identifies a transmission mode from a mode identification tone signal separated by the multicarrier separation unit 114. The data demodulation unit 116 demodulates data from a reception signal on the basis of the transmission mode.
Inventors:
NAITO MASASHI
Application Number:
JP2014064068A
Publication Date:
October 22, 2015
Filing Date:
March 26, 2014
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC
International Classes:
H04L27/26; H04W28/18; H04W72/04
Domestic Patent References:
| JP2012156606A | 2012-08-16 | |||
| JP4342171B2 | 2009-10-14 | |||
| JPH02261220A | 1990-10-24 |
Foreign References:
| US20030219068A1 | 2003-11-27 |