DocumentCode
1629573
Title
Discrete Rate Spectral Efficiency Improvement by Scheme Switching for MIMO Systems
Author
Huang, Jinliang ; Signell, Svante
Author_Institution
R. Inst. of Technol., Stockholm
fYear
2008
Firstpage
3998
Lastpage
4002
Abstract
Adaptive modulation scheme has been widely used in multiple-input multiple-output (MIMO) systems to enhance spectral efficiency while maintaining the bit error rate (BER) under a target level. We consider two MIMO schemes, orthogonal space-time block codes (OSTBC) and spatial multiplexing with zero-forcing receiver (SM-ZF), that apply adaptive modulation scheme and derive closed-form expressions of the average spectral efficiency and BER. Based on the closed-form expression of spectral efficiency, a low complexity switching method is utilized to obtain high spectral efficiency gain over an adaptive system using a single scheme.
Keywords
MIMO communication; block codes; error statistics; orthogonal codes; space-time codes; MIMO system; adaptive modulation scheme; bit error rate; orthogonal space-time block codes; spatial multiplexing; zero-forcing receiver; Adaptive systems; Bit error rate; Block codes; Closed-form solution; MIMO; OFDM; Rayleigh channels; Receiving antennas; Switches; Transmitters;
fLanguage
English
Publisher
ieee
Conference_Titel
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location
Beijing
Print_ISBN
978-1-4244-2075-9
Electronic_ISBN
978-1-4244-2075-9
Type
conf
DOI
10.1109/ICC.2008.751
Filename
4533787
Link To Document