Analysis of LDPC code in the FH system with partial‐band interference

Dai, Jingke; Jing, Yaque; Mao, Yao

doi:10.1049/iet-com.2017.0303

Cited by 4 publications

(7 citation statements)

References 31 publications

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“…Without loss of generality, we assume the transmitted symbol c � 1 in the current hop and then the conditional PDFs of y 1 , y 0 are given by [7]:…”

Section: System Model E Fh Communication System Model Is Depicted Inmentioning

confidence: 99%

“…e DDE of outer LDPC codes is similar to the above rules, only that the channel message PMF p z is removed at the CNs. e detail of DDE on the SR code is referred to [13], and here we just need to replace the initial LLR of the BPSK system by equation (7). e asymptotic BER performance of SLT codes and SR codes obtained by DDE under different PBI bandwidth fraction ρ is shown in Figure 3, where SNR is fixed to 10 dB and the outer code is fixed to a 0.98-rate regular (4, 200)-LDPC code.…”

Section: Asymptotic Performance Of Slt and Sr Codes We Define The Gementioning

confidence: 99%

“…Frequency hopping (FH) systems have been extensively employed to combat interference in commercial and military communications [1]. To further enhance the antijamming capability, error-correction codes have also been widely used in FH systems, like convolutional codes [2], Reed-Solomon codes [3], Turbo codes [4,5], and lowdensity parity-check (LDPC) codes [6,7] and all of them are rate-fixed. Since the interference on channels may change randomly and dramatically from time to time, the required code rate or signal power must be adjusted accordingly for uninterrupted communications.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, DDE is a better choice to obtain the asymptotic performance of the rateless code in the FH/BFSK system with interference. Furthermore, DDE has been successfully combined with the differential evolution (DE) algorithm to design LDPC codes [7] and SR codes [13], but it is a nonlinear optimization method which costs much computation and spends a long search time.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of Systematic Rateless Codes in FH/BFSK System with Interference

Dai

Zhao

Chen

et al. 2020

Mobile Information Systems

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e asymptotic analysis of systematic rateless codes in frequency hopping (FH) systems with interference is first provided using discretized density evolution (DDE) and compared with the traditional fixed-rate scheme. A simplified analysis with Gaussian assumption of initial message is proposed in the worst case of interference, which has much lower complexity and provides a very close result to DDE. Based on this simplified analysis, the linear programming is employed to design rateless codes and the simulation results on partial-band interference channels show that the optimized codes have more powerful antijamming performance than the codes originally designed for conventional systems.

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“…Without loss of generality, we assume the transmitted symbol c � 1 in the current hop and then the conditional PDFs of y 1 , y 0 are given by [7]:…”

Section: System Model E Fh Communication System Model Is Depicted Inmentioning

confidence: 99%

Section: Asymptotic Performance Of Slt and Sr Codes We Define The Gementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis and Design of Systematic Rateless Codes in FH/BFSK System with Interference

Dai

Zhao

Chen

et al. 2020

Mobile Information Systems

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“…Introduction: For reliable communications in the presence of partialband noise jamming (PBNJ), fast frequency hopping (FFH) system with L hops/bit (multiple hops per bit) is often employed. At the receiver end, diversity-combining techniques are usually used to achieve considerable performance gain [1][2][3][4][5]. In the past, it was shown that some of these diversity-combining techniques require the side information which is difficult for extraction while others can work well when side information is not available.…”

mentioning

confidence: 99%

F distribution in FFH/binary FSK system with dividing combining receiver

et al. 2019

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Fast frequency hopping (FFH) is a useful anti-jamming method. Many diversity combining methods are used to combat partial-band interference in FFH systems, including linear and non-linear combining receivers. In fifth-generation scenarios, FFH technique may take an important role in OFDM mode. In early works, a nonlinear combining receiver in FFH/binary FSK system named division-combining receiver (DCR) was proposed. It was found that the random variables for decision in the DCR are F-distributed under partial-band noise jamming over additive white Gaussian noise channel, which could be used for performance analysis and the probability computation of bit error. In this Letter, the specific presentations of DCR and its F-distribution characteristics are investigated. Simulations show that DCR receiver has a light advantage among non-linear receivers.

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