Title :
MMSE combining scheme with subblock noise covariance matrix for fractional sampling-OFDM receivers
Author :
Kobayashi, Tatsuya ; Nishimura, Haruki ; Sanada, Yukitoshi
Author_Institution :
Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama
Abstract :
A diversity scheme with fractional sampling (FS) in OFDM receivers is investigated recently. When a sharp filter is employed, the correlation of noise samples among the adjacent subcarriers increases, and the performance of this scheme is deteriorated. Therefore, low-complexity subcarrier based MMSE combining scheme with the subblock of the noise covariance matrix is proposed in this paper. Numerical results through computer simulation show that the MMSE combining scheme proposed in this paper can outperforms a conventional MRC scheme and a subcarrier based MMSE combining scheme, when the sharp filter is employed.
Keywords :
OFDM modulation; covariance matrices; least mean squares methods; radio receivers; MMSE combining scheme; MRC scheme; fractional sampling; fractional sampling-OFDM receivers; subblock noise covariance matrix; 1f noise; Application software; Computer simulation; Covariance matrix; Diversity methods; Diversity reception; Filters; Maximum likelihood detection; OFDM; Sampling methods;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699481
