Performance study of optical wireless communication system based on LDPC code and BPPM

LENG Jiao-feng; HAO Shi-qi; L&uuml; Xu-guang; YAN Fei

Performance of optical wireless communication system based on binary pulse position modulation(BPPM) and low-density parity-check(LDPC) code through atmospheric turbulence channel was investigated in the both situations of perfect channel state information(CSI) and non-channel state information(NCSI)compared with LDPC coded optical wireless communication system based on on-off keying(OOK)with the same bite rate and the same average transmission power.Simulation results show that in the both situations of CSI and NCSI,optical wireless communication systems based on LDPC code and BPPM have more excellent bit error rate performance than that of LDPC coded optical wireless communication systems based on OOK,and when decoded with the average fading amplitude as an estimate of the NCSI channel,performance of optical wireless communication system based on LDPC and BPPM are not degraded too much compared to the CSI channel,and it was also found that LDPC coded optical wireless communication systems based on BPPM are less sensitive to turbulent intensity than the systems based on OOK.Therefore,in the situation of NCSI,LDPC coded optical wireless communication systems based on BPPM have excellent error correction capabilities and access to a larger coding gains,and the above scheme is well suited for optical wireless communication systems.

Corresponding author: HAO Shi-qi, liu_hsq@126.com;

1. State Key Laboratory of Pulsed Power Laser Technology, Electronic Engneering Institute, Hefei 230037, China;

2. Key Laboratory of Electronic Restriction of Anhui Province, Electronic Engneering Institute, Hefei 230037, China

Received Date: 2011-08-31

Accepted Date: 2011-10-04

Available Online: 2012-05-25

Abstract: Performance of optical wireless communication system based on binary pulse position modulation(BPPM) and low-density parity-check(LDPC) code through atmospheric turbulence channel was investigated in the both situations of perfect channel state information(CSI) and non-channel state information(NCSI)compared with LDPC coded optical wireless communication system based on on-off keying(OOK)with the same bite rate and the same average transmission power.Simulation results show that in the both situations of CSI and NCSI,optical wireless communication systems based on LDPC code and BPPM have more excellent bit error rate performance than that of LDPC coded optical wireless communication systems based on OOK,and when decoded with the average fading amplitude as an estimate of the NCSI channel,performance of optical wireless communication system based on LDPC and BPPM are not degraded too much compared to the CSI channel,and it was also found that LDPC coded optical wireless communication systems based on BPPM are less sensitive to turbulent intensity than the systems based on OOK.Therefore,in the situation of NCSI,LDPC coded optical wireless communication systems based on BPPM have excellent error correction capabilities and access to a larger coding gains,and the above scheme is well suited for optical wireless communication systems.

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Reference (17)

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Performance study of optical wireless communication system based on LDPC code and BPPM

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