Performance of ML Range Estimator in Radio Interferometric Positioning Systems

Zhang, Yue; Qi, Wangdong; Li, Guangxia; Zhang, Su

doi:10.1109/lsp.2014.2352270

Cited by 12 publications

(4 citation statements)

References 18 publications

(34 reference statements)

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“…The multipath error correction scheme was used to estimate each channel's multipath profile in the process of the mitigation of multipath phenomena in the radio interferometric positioning system (Cheng Zhang et al 2017). Authors proposed the scheme of multipath error correction based on phase and amplitude of the received signal.…”

Section: Related Workmentioning

confidence: 99%

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2020

JDU

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The multipath phenomenon is a major factor that is continually affected negatively the performance of wireless communication systems. Since the receiver gets different copies of the transmitted signal from various paths at different times. Consequently, destructive or constructive interference can occur. Therefore, the performance of wireless communication systems is poor in term of bit error rate. This phenomenon can be taken as an advantage if the multipleinputmultipleoutput antenna systems are employed at both transmitter and receiver sides (antenna diversity) to improve the bit error rate performance. This paper focuses on the combination of multipath forward error correction diversity technique with vertical-Bell laboratories layered space-time coding. This will lead to enhance the bit error rate in wireless communication systems. The proposed system used Rayleigh and additive white Gaussian noise as two different channel models. The multipath forward error correction diversity technique treats the multipath propagated signals as unessential copies, to utilise them to enhance the bit error rate limitation in the multipleinputmultipleoutput systems. The simulation results showed that the performance of the proposed system can be gradually improved by increasing the number of utilised multipath signals in the multipath forward error correction diversity technique.

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Section: Related Workmentioning

confidence: 99%

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2020

JDU

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“…Authors proposed the scheme of multipath error correction based on phase and amplitude of the received signal. As a result, the estimated errors during the transmission can be reduced significantly under both moderate and severe multipath conditions (Cheng Zhang et al 2017).…”

Section: Related Workmentioning

confidence: 99%

Performance Improvement of Ber Based on Multipath Forward Error Correction Diversity in Wireless Communication Channels

Al-Khalil

2020

JDU

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The multipath phenomenon is a major factor that is continually affected negatively the performance of wireless communication systems. Since the receiver gets different copies of the transmitted signal from various paths at different times. Consequently, destructive or constructive interference can occur. Therefore, the performance of wireless communication systems is poor in term of bit error rate. This phenomenon can be taken as an advantage if the multiple – input – multiple – output antenna systems are employed at both transmitter and receiver sides (antenna diversity) to improve the bit error rate performance. This paper focuses on the combination of multipath forward error correction diversity technique with vertical-Bell laboratories layered space-time coding. This will lead to enhance the bit error rate in wireless communication systems. The proposed system used Rayleigh and additive white Gaussian noise as two different channel models. The multipath forward error correction diversity technique treats the multipath propagated signals as unessential copies, to utilise them to enhance the bit error rate limitation in the multiple – input – multiple – output systems. The simulation results showed that the performance of the proposed system can be gradually improved by increasing the number of utilised multipath signals in the multipath forward error correction diversity technique

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“…Applying the maximum likelihood estimate (MLE) using grid search was proposed to estimate the range in this study. In [23], the objective searching function maximizes the summation for the exponential function of the phase difference. The MLE with a refined grid search will lead to an accurate estimate, but it will consume time.…”

Section: Introductionmentioning

confidence: 99%

Phase Difference Compensation Method for Range Estimation in an MFCW–CW Radar

Ryu

Lee

2021

IEEE Access

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Multifrequency continuous-wave-continuous-wave (MFCW-CW) radars simultaneously transmit multifrequency continuous-wave (MFCW) signals sequentially at a constant time step and a continuous-wave (CW) signal constantly. As MFCW signals are transmitted sequentially, only one phase difference exists at each time. All phase differences between the MFCW and CW signals should be exploited to resolve ambiguous ranges. In this article, we propose a method to compensate the phase difference between the sequential MFCW signals and CW signal using the Doppler frequency of the CW signal. To verify the phase difference compensation result, we estimated the range of multiple targets. The simulation results showed that the proposed phase difference compensation method performed well regardless of compensation direction and target motion. Moreover, we proposed applying the maximum likelihood estimation (MLE) and reduced-complexity off-grid sparse Bayesian learning (RC-OGSBL) to estimate ranges and analyzed their performance. The range accuracy of the MLE using a 0.1-m grid search showed superior performance and the running time of the MLE using the simple method is the fastest among the simulated methods. The RC-OGSBL using a 5-m grid showed good results in terms of range accuracy and running time.

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Performance of ML Range Estimator in Radio Interferometric Positioning Systems

Cited by 12 publications

References 18 publications

Untitled

Untitled

Performance Improvement of Ber Based on Multipath Forward Error Correction Diversity in Wireless Communication Channels

Phase Difference Compensation Method for Range Estimation in an MFCW–CW Radar

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