Title :
Performance of Simulink Based SS-OFDM Model for Broadband Wireless Access Network
Author :
Akare, Umesh P. ; Lande, Sudhir B. ; Balpande, Suresh ; Thakre, Laxman P.
Author_Institution :
Digital Electron., RCET, Bhilai, India
Abstract :
Orthogonal Frequency Division Multiplexing (OFDM) has emerged as a potential application for the delivery of broad band wireless access. Both DS and FH systems reduce the average power spectral density of a signal and affects by broadband noise. Narrowband interference impacts severely on an FH signal than a DS signal on the same channel. The combination of OFDM with Direct Sequence Spread Spectrum (DS-SS) resulting in SS-OFDM, is suitable for the design of a multi-user system, robust against channel impairments. We have simulated the SS-OFDM model with BPSK, QPSK, 8-PSK, 16-PSK, 64-PSK and 8-QAM, 16-QAM, 64-QAM modulation techniques. Simulation results for SSOFDM with BPSK modulation is found suitable for short distance communication whereas 8-PSK modulation can be used for long distance communication. But we recommend MQAM modulation for SS-OFDM since it gives remarkable improvement in BER as compared to M-PSK.
Keywords :
OFDM modulation; broadband networks; multiuser channels; phase shift keying; quadrature amplitude modulation; radio access networks; spread spectrum communication; BER; BPSK; M-PSK; M-QAM; QPSK; SS-OFDM model; Simulink; broadband wireless access network; direct sequence spread spectrum; multi-user system; narrowband interference; orthogonal frequency division multiplexing; Binary phase shift keying; Interference; Narrowband; Noise reduction; Noise robustness; OFDM modulation; Power system modeling; Quadrature phase shift keying; Spread spectrum communication; Wireless networks;
Conference_Titel :
Emerging Trends in Engineering and Technology (ICETET), 2009 2nd International Conference on
Conference_Location :
Nagpur
Print_ISBN :
978-1-4244-5250-7
Electronic_ISBN :
978-0-7695-3884-6
DOI :
10.1109/ICETET.2009.178
