emlab modeling of digital communication systems using simulink chap.13 simulink examples 13.3 spread...

EMLAB Modeling of Digital Communication Systems using Simulink Chap.13 Simulink Examples 13.3 Spread Spectrum 13.4 Antenna Nulling EMLAB 1 AWGN spread spectrum BPSK 13.3 Spread Spectrum Spread Spectrum Simulink Model without In-Band Interference BPSK signal; sampling time: 1s Spread spectrum; sampling time: 0.1s EMLAB Spread Spectrum Simulink Model without In-Band Interference (contd) Received signal BPSK Demodulated signal Transmitted signal Transmitted signal BPSK Modulated signal Transmitted signal BPSK Spread Spectrum signal AWGN BPSK (E b /N 0 =3dB ) 100 , E b /N 0 =3dB spreading BER . EMLAB 3 Spread Spectrum Simulink Model with In-Band Interference 1kHz, 1V p_p, 30V p_p Spread spectrum; sampling time: 0.01s, 0.001s EMLAB 4 Spectrum Analyzer Spread Spectrum Simulink Model with In-Band Interference (contd) Spread Spectrum BPSK : 1V p_p EMLAB Spread Spectrum Simulink Model with In-Band Interference (contd) Transmitted Signal: 100 chips/bit Despread Signal: 100 chips/bit : 1V p_p EMLAB Spread Spectrum Simulink Model with In-Band Interference (contd) Transmitted Signal: 1000 chips/bit Despread Signal: 1000 chips/bit EMLAB Spread Spectrum Simulink Model with In-Band Interference (contd) Transmitted Signal: 1000 chips/bit Despread Signal: 1000 chips/bit BPSK Spread Spectrum signal Spread Spectrum signalTransmitted Signal Before BPSK Modulated Received Signal BPSK Despread EMLAB Spread Spectrum Simulink Model with In-Band Interference (contd) : 60V p_p Transmitted Signal: 100 chips/bit Received Signal: 100 chips/bit EMLAB 9 RLS Spread Spectrum Simulink Model with In-Band Interference and Excision filter length=32, forgetting factor=1, initial input variance=0.1 EMLAB 10 : 60V p_p, RLS filter Spread Spectrum Simulink Model with In-Band Interference and Excision (contd) Received Signal: 100 chips/bit RLS EMLAB Antenna Nulling EMLAB Antenna Nulling (contd) EMLAB 13 13.4 Antenna Nulling (contd) EMLAB 13.4 Antenna Nulling (contd) 14 S/I = 0dB EMLAB 15 13.4 Antenna Nulling (contd) EMLAB 16 S/I = 0dB, 10dB Antenna Nulling (contd)