Hop Rate Estimation of Hybrid DS/FH Spread Spectrum Signals Based on a Channelized Spectral Enhancement Strategy

Gass J H, Noneaker D L, and Pursley M B. A comparison of slow-frequency-hop and direct-sequence spread-spectrum packet communications over doubly selective fading channels[J].IEEE Transactions on Communications.2002, 50(8):1236-1239[2]Ko C C, Zhi W J, and Chin F. ML-based frequency estimation and synchronization of frequency hopping signals[J].IEEE Transactions on Signal Processing.2005, 53(2):403-410[3]Geraniotis E A. Coherent hybrid DS-SFH spread-spectrum multiple-access communications. IEEE Journal on Selected Areas in Communications, 1985, SAC-3(5): 695-705.[4]Hill D A and Felstead E B. Laboratory performance of spread spectrum detectors[J].IEE Proceedings Communications.1995, 142(4):243-249[5]Varzakas P and Tombras G S. Spectral efficiency for a hybrid DS/FH code-division multiple-access system in cellular mobile radio[J].IEEE Transactions on Vehicular Technology.2001, 50(6):1321-1327[6]Phoel W G. Iterative demodulation and decoding of frequency-hopped PSK in partial-band jamming[J].IEEE Journal on Selected Areas in Communications.2005, 23(5):1026-1033[7]Hussain Z M and Boashash B. Adaptive instantaneous frequency estimation of multicomponent FM signals using quadratic time-frequency distributions[J].IEEE Transactions on Signal Processing.2002, 50(8):1866-1876[8]Turicchia L and Sarpeshkar R. A bio-inspired companding strategy for spectral enhancement[J].IEEE Transactions on Speech Audio Processing.2005, 13(2):243-253[9]Gupta D, Filippov T V, and Kirichenko A F. Digital channelizing radio frequency receiver[J].IEEE Transactions on Applied Superconductivity.2007, 17(2):430-437[10]Tsividis Y. Externally linear, time-invariant systems and their application to companding signal processors[J].IEEE Transactions on Circuits Systems II.1997, 44(2):65-85[11]Shui P L, Bao Z, and Su H T. Nonparametric detection of FM signals using time-frequency ridge energy[J].IEEE Transactions on Signal Processing.2008, 56(5):1749-1760[12]Ivanovic V N and Jovanovski S. Signal adaptive system for time-frequency analysis[J].Electronics Letters.2008, 44(21):1279-1280[13]Shui P L, Shang H Y, and Zhao Y B. Instantaneous frequency estimation based on directionally smoothed pseudo-Wigner -Ville distribution bank[J].IET Radar Sonar and Navigation.2007, 1(4):317-325