Symbol transmission method and apparatus for use in filter bank multicarrier system

An apparatus for transmitting filter-bank multi-carrier (FBMC) symbols in a FBMC system, the apparatus comprising:

• a switch configured to switch each FBMC symbol to one of a pre-transient transmission duration filter, a non-transient transmission duration filter, and a post-transient transmission duration filter;
• the pre-transient transmission duration filter configured to:
• truncate the FBMC symbol of which part overlapped with the pre-transient transmission duration, and
• change the energy distribution characteristic of the FBMC symbol;
• the post-transient transmission duration filter configured to:
• truncate the FBMC symbol of which part overlapped with the post-transient transmission duration, and
• change the energy distribution characteristic of the FBMC symbol;
• the non-transient transmission duration filter configured to filter the whole FBMC symbol positioned within the non-transient transmission duration;
• a parallel/series conversion unit configured to perform parallel/series conversion on the FBMC symbols output from the pre-transient transmission duration filter, the post-transient transmission duration filter, and the non-transient transmission duration filter;
• and
• a control unit configured to control the operations of the switch and the filters.

A method of transmitting offset quadrature amplitude modulation (OQAM) filter-bank multi-carrier (FBMC) symbols in an OQAM-FBMC system, the method comprising:

• configuring a transient transmission duration and non-transient transmission duration according to an overlapping facto of an OQAM-FBMC symbol;
• truncating a part of the OQAM-FBMC symbol which is overlapped with the transient transmission duration;
• changing energy distribution characteristics of filters to be applied to a real number part and imaginary part of the OQAM-FBMC symbol in the non-transient transmission duration;
• filtering the OQAM-FBMC symbol to be transmitted in the non-transient transmission duration using the filters with the changed energy distribution characteristics;
• and
• transmitting the filtered OQAM-FBMC symbols at corresponding transmission timings.

An apparatus for transmitting offset quadrature amplitude modulation (OQAM) filter-bank multi-carrier (FBMC) symbols in an OQAM-FBMC system, the apparatus comprising:

• a switch configured to switch each OQAM-FBMC symbol to one of a pre-transient transmission duration filter, a non-transient transmission duration filter, and a post-transient transmission duration filter;
• the pre-transient transmission duration filter configured to:
• truncates the OQAM-FBMC symbol of which part overlapped with the pre-transient transmission duration, and
• change the energy distribution characteristic of the OQAM-FBMC symbol by manipulating a real number part and an imaginary part of the OQAM-FBMC symbol distinctly;
• the post-transient transmission duration filter configured to:
• truncate the OQAM-FBMC symbol of which part overlapped with the post-transient transmission duration, and
• change the energy distribution characteristic of the OQAM-FBMC symbol by manipulating the real number part and the imaginary part of the OQAM-FBMC symbol distinctly;
• the non-transient transmission duration filter configured to filter the whole OQAM-FBMC symbol positioned within the non-transient transmission duration;
• a parallel/series conversion unit configured to perform parallel/series conversion on the OQAM-FBMC symbols output from the pre-transient transmission duration filter, post-transient transmission duration filter, and non-transient transmission duration filter;
• and
• a control unit configured to control the operations of the switch and the filters.