Title :
BER performance analysis of a multi user Alamouti-MRC system on secured text message transmission
Author :
Ahmed, Toufik ; Ali, Md Mortuza ; Ullah, S.E.
Author_Institution :
Dept. of Electr. & Electron. Eng., Rajshahi Univ. of Eng. & Technol., Rajshahi, Bangladesh
Abstract :
This paper investigates the effect of antenna diversity for a double transmit and multiple receive antenna supported wireless communication system that employs multi user Alamouti´s space time block coding (STBC) and maximal ratio combining (MRC) scheme on secured text message transmission. The FEC encoded Alamouti-MRC transmission system under investigation implements RSA cryptographic algorithm and deploys various multi-level digital modulations (16-PSK, 16-DPSK and 16-QAM) techniques over an Additive White Gaussian Noise (AWGN) and Rayleigh Fading Channels. It has been observed from the study that in case of without receive antenna diversity the system shows comparatively worst performance in 16-DPSK scheme and satisfactory performance in 16-QAM. It is noticeable that the system performance is improved with increase in number of receive antenna. The performance analysis shows that with implemented Alamouti-MRC scheme (6 receive antenna) under 16-QAM digital modulation, the system provides excellent performance over a significant low signal to noise ratio (SNR) values.
Keywords :
AWGN channels; Rayleigh channels; differential phase shift keying; diversity reception; electronic messaging; error statistics; multiuser channels; public key cryptography; quadrature amplitude modulation; radio receivers; radio transmitters; radiocommunication; space-time block codes; telecommunication security; 16-DPSK technique; 16-PSK technique; 16-QAM technique; AWGN; BER performance analysis; FEC encoded Alamouti-MRC transmission system; MRC scheme; RSA cryptographic algorithm; Rayleigh fading channel; SNR value; STBC; additive white Gaussian noise; antenna diversity; double transmit antenna; maximal ratio combining scheme; multilevel digital modulation; multiple receive antenna; multiuser Alamouti space time block coding; multiuser Alamouti-MRC system; secured text message transmission; signal to noise ratio; wireless communication system; Antenna Diversity; Bit Error Rate; MRC; Rayleigh Fading; STBC;
Conference_Titel :
Computer and Information Technology (ICCIT), 2012 15th International Conference on
Conference_Location :
Chittagong
Print_ISBN :
978-1-4673-4833-1
DOI :
10.1109/ICCITechn.2012.6509717
