The results show that the scheme of turbo code based on BPSK can degrade SNR 3 dB compared with that of BPSK and BPPM, and the scheme of BPSK is efficient to degrade the BER of system when the SNR is high.

• 结果表明；基于BPSK的turbo码系统比OOK和BPPM系统的信噪比降低约3dB；且在高的信噪比情况下；BPSK系统能显著降低系统的误码率.