摘要 |
<p>Provided is a digital modulation method capable of narrowing a base band width while increasing the number of transmission bits per symbol. The digital modulation method deviates the phase of a carrier signal continuously thereby to transmit digital data, and limits the maximum of the phase to be deviated, when digital data of 2 bits or more is transmitted by one phase deviation. A digital modulation circuit includes a base band signal generation circuit (11) for generating a base band signal, of which the maximum of the phase to be deviated is limited, in a manner to meet the digital data of 2 bits or more to be transmitted by one phase deviation, and an orthogonal modulator (12) for modulating the generated base band signal orthogonally.</p> |
申请人 |
MITSUBISHI ELECTRIC CORPORATION;TOHOKU UNIVERSITY;TSUBOUCHI, KAZUO;TAKAGI, TADASHI;NAKASE, HIROYUKI;KAMEDA, SUGURU;ISHIZU, FUMIO;SOGABE, YASUSHI;FUJIMURA, AKINORI |
发明人 |
TSUBOUCHI, KAZUO;TAKAGI, TADASHI;NAKASE, HIROYUKI;KAMEDA, SUGURU;ISHIZU, FUMIO;SOGABE, YASUSHI;FUJIMURA, AKINORI |