Performance analysis of curve-shaped NLFM against Doppler effect and background noise

Rohman, Budiman P.A.; Ratna, Indrawijaya; Miftahushudur, Tajul; Wael, Chaeriah Bin Ali

doi:10.1109/icramet.2016.7849581

Cited by 3 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the handover delay increases along with the acceleration of the train speed. It is because higher moving speed causes more serious Doppler effects [25], resulting in the deterioration of bit error rate performance and the delay of handover signaling transmission. Therefore, the high mobility has a certain impact on handover performance.…”

Section: Performance Evaluationmentioning

confidence: 99%

A Relay-assisted Secure Handover Mechanism for High-speed Trains

2019

KSII TIIS

View full text Add to dashboard Cite

Considering that the existing Long Term Evolution is not suitable for the fast and frequent handovers of high-speed trains, this paper proposes a relay-assisted handover mechanism to solve the problems of long handover authentication time and vulnerable to security attacks. It can achieve mutual authentication for train-ground wireless communication, and data transmission is consistent with one-time pad at the same time. The security analysis, efficiency analysis and simulation results show that the proposed mechanism not only realizes the forward security and resists many common attacks, but also effectively reduces the computational overhead of train antenna during the secure handover process. When the running speed of a train is lower than 500km/h, the handover delay is generally lower than 50ms and the handover outage probability is less than 1.8%. When the running speed of a train is 350km/h, the throughput is higher than 16.4mbps in the process of handover. Therefore, the secure handover mechanism can improve the handover performance of high-speed trains.

show abstract

Section: Performance Evaluationmentioning

confidence: 99%

A Relay-assisted Secure Handover Mechanism for High-speed Trains

2019

KSII TIIS

View full text Add to dashboard Cite

show abstract

“…A radar observing a moving object or target will be cause a Doppler effect and time dilation that will affect the performance of the pulse compression [18] - [19]. The LFM signal has Doppler tolerance when the target conditions at very high speeds but have the same pulse compression performance as the stationary condition.…”

Section: Doppler Effectmentioning

confidence: 99%

“…- (17) In (17), is time of target (seconds), is distance of target (meter), is speed of target (m/s), is time (seconds), is speed of light (3x108m/s). (18) In (18), ′ is time dilation (seconds) and is pulse width (seconds) (19) In (19), is doppler frequency (Hz) and : wavelength (meter).…”

Section: Model For Realistic Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Non Linear Frequency Modulation (NLFM) Waveforms for Pulse Compression Radar

Widyantara

Sugihartono

Suratman

et al. 2018

indones.j.electron.telecommun.

View full text Add to dashboard Cite

Non Linear Frequency Modulation (NLFM) method can suppress the peak sidelobe level without additional windowing function. NLFM doesn’t require any weighting function because it has inbuilt one. NLFM has a variable frequency deviation function due to the relation between frequency and time of the signal which is not linear so that it is possible to suppress of peak sidelobe level. This paper studies the characteristic of various NLFM waveform, such as NLFM Tri Stage Piece Wise (TSPW), NLFM S, and NLFM Taylor. The study of Pulse Compression of NLFM waveform consists of three aspects. First, analysis of pulse compression performance. Second, analysis of background noise. Last, analysis of Doppler effects. The simulation is done using Matlab software. The lowest value Peak Sidelobe Level (PSL)of NLFM TSPW is about -20 dB while NLFM S and NLFM Taylor are about -32 dB and -39 dB. Additive White Gaussian Noise (AWGN) and Doppler Effect influenced the value of PSL for each NLFM waveform. NLFM Taylor has the best NLFM waveform when the Doppler Effect and AWGN cause the value of PSL become high. Comparison between NLFM Taylor and Linear Frequency Modulation(LFM) is done in radar surveillance applications to analyze the detectability performance where the condition of Radar Cross Section (RCS) for each target has different significant value. The three targets are commercial airplanes, helicopter and fighter. For detectability performance, NLFM Taylor can detect more clearly than LFM conventional.

show abstract