Bandwidth efficiency improvement for multi-carrier systems

Author

Hamamura, Masanori ; Tachikawa, Shin Ichi

Author_Institution

Dept. of Inf. Syst. Eng., Kochi Univ. of Technology, Japan

Volume

1

fYear

2004

fDate

5-8 Sept. 2004

Firstpage

48

Abstract

A novel multi-carrier transmission system named high compaction multi-carrier modulation (HC-MCM) is proposed to improve the spectral efficiency of OFDM. The HC-MCM can arbitrarily overlap the spectra of its subcarriers with an operation for the transmitting signal, whereby a fast transmission rate can easily be achieved. A DFT-based transmitter and receiver, spectral efficiency, the minimum Euclidean distance, and bit-error rate (BER) characteristics are elaborated. As a result, it is shown that a remarkable improvement in spectral efficiency can be obtained by the HC-MCM as the number of subcarriers increases. It is also shown that subcarrier spectra overlapping is sensitive to the minimum Euclidean distance, but large enough in comparison with OFDM under the condition that the transmission rate and the frequency spacing of subcarriers are identical to those in OFDM.

Keywords

OFDM modulation; discrete Fourier transforms; error statistics; radio receivers; radio transmitters; BER; DFT; Euclidean distance; OFDM; bit-error rate; high compaction multi-carrier modulation; multi-carrier transmission system; receiver configuration; spectral efficiency; transmitter configuration; wireless medium; Bandwidth; Binary phase shift keying; Bit error rate; Compaction; Euclidean distance; Information systems; Interference; OFDM modulation; Propagation losses; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on

Print_ISBN

0-7803-8523-3

Type

conf

DOI

10.1109/PIMRC.2004.1370834

Filename

1370834