Title :
Linear dispersion space-time codes for multiuser systems with low decoding complexity
Author :
Hsu, Fu-Te ; Su, Hsuan-Jung
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
Abstract :
We explicitly construct space-time codes for a multiple access system composed of K users transmitting simultaneously to the base station in block-fading channels. Each user encodes its own data independently without cooperation between users. Our codes design uses the idea of linear dispersion encoding together with circulant matrices assigned to each user that allow low-complexity linear minimum mean square error (MMSE) decoding when the channel realization is known to the base station. Moreover, the ergodic sum rate of the proposed design is studied and compared with the sum capacity.
Keywords :
computational complexity; fading channels; least mean squares methods; linear codes; matrix algebra; multi-access systems; space-time codes; base station; block-fading channels; circulant matrices; linear dispersion encoding; linear dispersion space-time codes; low decoding complexity; low-complexity linear minimum mean square error decoding; multiple access system; multiuser systems; Base stations; Block codes; Detectors; Error analysis; Fading; Maximum likelihood decoding; Maximum likelihood detection; Mean square error methods; Receiving antennas; Space time codes;
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.2008.4699685
