Title :
Modulation Scheme Based on Precoder Matrix for MIMO Optical Wireless Communication Systems
Author :
Wu, Liang ; Zhang, Zaichen ; Liu, Huaping
Author_Institution :
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
fDate :
9/1/2012 12:00:00 AM
Abstract :
A modulation scheme for multiple-input multiple-output (MIMO) optical wireless systems that employ intensity modulation (IM) is proposed. This scheme, called precoder matrix modulation (PMM), exploits the properties of MIMO optical wireless communications to translate the spatial dimension into the constellation parameters by using a ´precoder matrix´. The transmitted signals in PMM are guaranteed to be nonnegative, as required in IM optical wireless communications. Existing schemes such as pulse-amplitude modulation could be used in such systems, but the proposed scheme has a much better performance. The constellation size of PMM can be flexibly increased, mitigating the bandwidth shortage issue due to the limitation of light emitting diodes (the transmitters).
Keywords :
MIMO communication; intensity modulation; matrix algebra; optical communication; optical modulation; precoding; IM; MIMO; PMM; intensity modulation; light emitting diode; multiple input multiple output; optical wireless communication; precoder matrix modulation; MIMO; Optical modulation; Optical receivers; Optical transmitters; Wireless communication; Optical wireless communications; modulation; multiple-input multiple-output (MIMO); precoding;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.071612.120973