Narrowband Interference Suppression in a Spreading WFRFT System and Optimal Order Selection

Liang, Yuan; Hu, Hang; Ni, Lei; Da, Xinyu; Xu, Ruiyang; Zhai, Dong

doi:10.1109/iccsn.2018.8488238

Cited by 1 publication

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a matter of clarity, when calculating only C 42 for different baseband modulation signals, X ASK , X PSK and X QAM , we will skip the subscripts ASK, PSK, and QAM in Eq. 6, (7) and (8) respectively. In the following deductions, the calculation of C 42 will be conducted for different baseband modulations.…”

Section: B Calculations Of C 42 For Ask Psk Qammentioning

confidence: 99%

“…The WFRFT-based system can be regarded as the convergence of Multi-Carrier (MC) and Single Carrier (SC) systems, and can be compatible with the current communication systems [2], [3], such as Single Carrier with Frequency Domain Equalization (SC-FDE), Orthogonal Frequency Division Multiplex(OFDM) and Long Term Evolution (LTE) [4]. The WFRFT-based system has the property to make the original signal bit energy distributed in frequency-time domain [2], and exhibits better performance on anti-interference [5]- [8] and anti-interception abilities [9]- [13] than other MC or SC systems. Since WFRFT-based system can be regarded as a novel hybrid carrier scheme that can converge the current SC and MC schemes [2], it's difficult to recognize the WFRFT signals by using the traditional recognition methods that apply to the SC and MC modulation recognitions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Modulation Recognition for WFRFT-Based System Using 4th-Order Cumulants

et al. 2019

Self Cite

View full text Add to dashboard Cite

We present a novel modulation recognition for weighted-type fractional Fourier transform (WFRFT)-based systems using the fourth-order cumulants. First, the constellation characteristics of the basic digital modulations ASK, PSK, and QAM are analyzed, and the corresponding relationships between the neighboring constellation points' distance and the constellation size are deduced. Second, the closed-form expressions of the fourth-order cumulants (C 42) for the WFRFT-based systems with ASK, PSK, and QAM are derived. Finally, through the first-and second-order derivatives of the C 42 , we prove that the optimal WFRFT order α r can be obtained through the minimization of the C 42. The simulation results show that the novel recognition for the WFRFT-based system is feasible and can reach an accuracy of almost 90% when energy per bit-to-noise power spectrum density ratio (E b /N 0) is greater than 6. INDEX TERMS Weighted-type fractional Fourier transform (WFRFT), modulation recognition, order optimization using 4th-order cumulants.

show abstract

Section: B Calculations Of C 42 For Ask Psk Qammentioning

confidence: 99%