Partial band jamming of multicarrier frequency hopping/binary phase shift keying receiver over a Rayleigh fading channel with imperfect channel estimation

El-Mahdy, Ahmed

doi:10.1049/iet-com.2009.0382

Cited by 7 publications

(8 citation statements)

References 9 publications

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“…The conventional CFAR detector of radar systems assumes that background noise follows Gaussian distribution. However, the output distribution of the proposed NJPE was not Gaussian because of the square and square-root terms in Equation (6).…”

Section: Jammer Detector Wirh Gamma Distributionmentioning

confidence: 99%

“…where Z l denotes the estimated power of the noise and jammer in the l-th slot from Equation (6). If the only nonjammed slots based on S comb were combined, a larger signal-to-noise ratio (SNR) and a better BER could be attained.…”

Section: Jammer Detector Wirh Gamma Distributionmentioning

confidence: 99%

“…Let the NJPE output be a random variable Z, and its sample mean and variance be M and S 2 , respectively. NJPE (Z) is expressed as Equation (6). We rewrite the equation as…”

Section: Conflicts Of Interestmentioning

confidence: 99%

“…Military wireless communications need to mitigate jammers to attain reliability. To reduce jamming, several antijam techniques, such as frequency-hopping spread spectrum (FHSS) and direct-sequence spread spectrum (DSSS), were researched [3][4][5][6][7][8][9][10][11][12][13][14][15]. When jammer power is large, the FHSS is known to be more effective [16], but BER degradation remains.…”

Section: Introductionmentioning

confidence: 99%

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Antijamming Improvement for Frequency Hopping Using Noise-Jammer Power Estimator

et al. 2020

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In frequency-hopping spread-spectrum (FHSS) systems, jammer detection and mitigation are important but difficult. Each slot of the FHSS experiences frequency-selective fading and unequal transceiver-frequency gains that hinder the detection of jammed slots and result in a poor bit-error rate (BER). To increase BER performance, we first propose a noise-jammer power estimator (NJPE) that estimates noise and jammer powers regardless of different channel gains, and derived its normalized Cramér–Rao bound (NCRB). Second, we developed a jammer detector based on gamma distribution, and designed a restoration method combining all nonjammed slots. Computer simulations verified the derived NCRB of the proposed NJPE by normalized mean squared error (NMSE), and showed that the jammer-detection probability of the proposed jammer detector was better than that of conventional detectors. The BER performance of the proposed method was also shown to be better than that of conventional methods.

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Section: Jammer Detector Wirh Gamma Distributionmentioning

confidence: 99%

Section: Jammer Detector Wirh Gamma Distributionmentioning

confidence: 99%

“…Let the NJPE output be a random variable Z, and its sample mean and variance be M and S 2 , respectively. NJPE (Z) is expressed as Equation (6). We rewrite the equation as…”

Section: Conflicts Of Interestmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Antijamming Improvement for Frequency Hopping Using Noise-Jammer Power Estimator

et al. 2020

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“…The result can be adapted to MC-DS-CDMA systems with maximal-ratio combining. In [15]- [17] the performance of MC CDMA systems under full-time, partial-band jamming was studied. And in [2], the performance of MC-DS-CDMA under fulltime, partial-band jamming was studied for both narrowband Gaussian noise and continuous-wave tone interference.…”

mentioning

confidence: 99%

Multicarrier DS-CDMA System Under Fast Rician Fading and Partial-Time Partial-Band Jamming

Cosman

Milstein

2019

IEEE Trans. Commun.

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The impact of joint partial-time, partial-band jamming on a multicarrier (MC) asynchronous direct-sequence code-division multiple access (DS-CDMA) system in a fast fading environment is studied in conjunction with two different subcarrier combining and decoding schemes. An easy-to-evaluate upper bound using the Chernoff bound is provided and compared to simulation results. Simulation results suggest that for soft-decision decoding systems, under Rayleigh fading, full-time, full-band jamming is most effective. In contrast to the Rayleigh case, when a sufficiently strong line-of-sight component exists in the channel, the jammer's optimal strategy of attacking in time or frequency depends on the strength and the type of error correction that the system is deploying for that dimension. For hard-decision decoding systems, in Rayleigh fading, partial-band jamming is recommended. For the coding strategies examined, in Rician fading, the jammer should switch from full-time, partial-band jamming to a strategy that jams a higher percentage of the more heavily protected dimension as the jamming power increases. Furthermore, for AWGN channels, the results from the system show that the jammer should always jam a higher percentage of the more heavily protected dimension. Index Terms-Code division multiaccess, multipath channels, rician channels, jamming. I. INTRODUCTION D IFFERENT realizations of multitone direct-sequence code-division multiple access (DS-CDMA) and multicarrier (MC) DS-CDMA systems have been proposed and their performances have been analyzed in many publications [1]-[8]. It is well-known that DS-CDMA systems are vulnerable to partial-time jamming [9], [10], and in [11], [12] it can be seen that, depending on the design, multicarrier systems can be vulnerable to partial-band jamming. In this paper, we focus on the performance of the MC-DS-CDMA system described in [1] under joint partial-time, partial-band jamming. The performance of DS-CDMA systems undergoing a jamming attack has been studied extensively for the single carrier case. In [9], [13], [14] the performance of coded

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Multi-tone CDMA design for arbitrary frequency offsets using orthogonal code multiplexing at the transmitter and a tunable receiver

Manglani

Chaturvedi

2011

IET Communications

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Partial band jamming of multicarrier frequency hopping/binary phase shift keying receiver over a Rayleigh fading channel with imperfect channel estimation

Cited by 7 publications

References 9 publications

Antijamming Improvement for Frequency Hopping Using Noise-Jammer Power Estimator

Antijamming Improvement for Frequency Hopping Using Noise-Jammer Power Estimator

Multicarrier DS-CDMA System Under Fast Rician Fading and Partial-Time Partial-Band Jamming

Multi-tone CDMA design for arbitrary frequency offsets using orthogonal code multiplexing at the transmitter and a tunable receiver

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