Performance Analysis of LDPC Coded SFH/BPSK in LFM Jamming

2013 ◽  
Vol 470 ◽  
pp. 748-752
Author(s):  
Jiong Li ◽  
Man Xi Wang ◽  
Dao Xing Guo ◽  
Xiao Fei Pan
Keyword(s):  
Code Rate ◽  
Low Density ◽  
Parity Check ◽  
Code Length ◽  
Phase Shift Keying ◽  
Rate Code ◽  
Low Density Parity Check ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Slow Frequency

In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence linear frequency modulated (LFM) jamming. We investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with LFM jamming by numerical simulation. And the results suggest that there is good performance through designing the system reasonably.

Performance Analysis of LDPC Coded SFH/BPSK in Partial-Band Interference

2013 ◽  
Vol 443 ◽  
pp. 417-421
Author(s):  
Jiong Li ◽  
Dao Xing Guo ◽  
Chao Gong
Keyword(s):  
Error Probability ◽  
Code Rate ◽  
Parity Check ◽  
Code Length ◽  
Phase Shift Keying ◽  
Rate Code ◽  
Low Density Parity Check ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Slow Frequency

In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence partial-band interference (PBI). The contributions of this paper are two folds. First, we give the bits error probability (BER) of the SFH/BPSK system with PBI by analysis, and further verify it by numerical results. Second, we investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with PBI by numerical simulation.

Study on LDPC Coded SFH System with Multi-Tone Interference

2013 ◽  
Vol 659 ◽  
pp. 83-88
Author(s):  
Lu Liang Jia ◽  
Ai Jun Liu ◽  
Dao Xing Guo ◽  
Gong Chao
Keyword(s):  
Additive White Gaussian Noise ◽  
Code Rate ◽  
Modulation Scheme ◽  
Parity Check ◽  
Code Length ◽  
Soft Decision ◽  
Rate Code ◽  
Low Density Parity Check ◽  
Simulation Results ◽  
Slow Frequency

Low-Density Parity-Check code, for its admiring performance which is close to the Shannon limit, has attracted large attention in anti-jamming systems. In this paper, we studied the LDPC coded slow frequency-hopping (SFH) system and analyzed its performance with Multi-tone Interference (MTI). Three modulation schemes (BPSK, QPSK and 8PSK) are adopted in the system. Especially for 8PSK, we compared the performance of two different soft-decision demodulation schemes over additive white Gaussian noise (AWGN) channel. Also, the influences of code rate, code length, modulation scheme and jamming mode are analyzed and examined, respectively. Finally, some valuable guidelines for designing LDPC coded SFH system are proposed. Simulation results demonstrate that a desirable performance can be achieved with the appropriately designed LDPC in SFH system.

scholarly journals Research on LDPC Coding for Free Space Optical Communication with Modified Bessel-Gaussian Beams Based on K-distribution

2018 ◽  
Vol 179 ◽  
pp. 03023
Author(s):  
Jin Wang ◽  
Fujiang Zeng ◽  
Qingqing Liang ◽  
Xiaofeng Zhang
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Ldpc Code ◽  
Code Rate ◽  
Low Density ◽  
Free Space Optical Communication ◽  
Parity Check ◽  
Free Space Optical ◽  
Low Density Parity Check ◽  
Space Optical Communication

We investigate the performance of low-density parity-check (LDPC) coding for free space optical communication (FSO) with modified Bessel-Gaussian (MBG) beams based on K-distribution. Based on an extended Huygens–Fresnel principle, the receiver plane intensity isformulated and then we analyze the propagation characteristics of MBG beams traveling in aturbulent atmosphere. Numerical calculations show that the interaction of the transmissiondistance, refractive index structure constant, and wavelength will affect the imaginary term inthe beam, allowing the beam to exhibit the properties of the MBG beams. To further improvethe communication quality of the FSO system, we introduce a fast Quasi-Cyclic (QC)Low-Density Parity-Check (LDPC) code. Simulation results show that under weak and strong turbulence conditions, the performance of the QC-LDPC code becomes better and better as the code rate increases, and the bit error rate (BER) keeps decreasing as the code rate increases.

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