多小波分形調(diào)制理論及其性能分析
Fractal Modulation with Multiwavelets and Its Performance
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摘要: 該文提出正交多小波分形調(diào)制理論，計(jì)算了理論功率譜密度和二進(jìn)數(shù)據(jù)下的誤碼率。多小波分形調(diào)制在各尺度能夠提供更多的子頻帶，為更多用戶服務(wù)，具有更高的頻帶利用率。仿真了其在加性高斯信道、Rayleigh信道和多徑信道下的誤碼率，并利用多小波周期自相關(guān)函數(shù)分析了系統(tǒng)抗多徑干擾能力，更進(jìn)一步，根據(jù)多小波周期自相關(guān)函數(shù)的過零點(diǎn)數(shù)對多小波函數(shù)進(jìn)行正交時(shí)移重疊，提高了系統(tǒng)數(shù)據(jù)速率。
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關(guān)鍵詞:
- 分形調(diào)制;多小波;頻帶利用率;周期自相關(guān)函數(shù)
Abstract: Fractal modulation based on multiwavelet is proposed and its power density spectrum is calculated and also its bit error ratio under binary data is calculated. Multiwavelet fractal modulation provides more sub-bands and holds more users at each scale and has much higher band efficiency than that with single wavelet. The bit error rate under additive white Gaussian noise channel, Rayleigh channel and multi-path channel is simulated. The systems anti-multi-path fading ability is analyzed by the periodic auto-correlation function of multiwavelets and wavelets. According to the number of the zero point of the periodic auto-correlation function, the capacity can be improved by orthogonal shift and overlapping in time domain. -
Wornell G W. Communication over fractal channels. IEEE International Conference on Acoustics, Speech and Signal Processing, New York, 1991:19451948. .[2]Wornell G W, Oppenheim A V. Wavelet-based representations for a class of self-similar signals with application to fractal modulation[J].IEEE Trans. on Information Theory.1992, 38(2):785-[3]Ptasinski H S.[J].Fellman R D. Implementation and simulation of a fractal modulation communication system. IEEE Supercomm/In-tern ational Communications Conference94:Serving Humanity Though Communications, New York.1994,:-[4]閻曉紅,劉貴忠, 劉峰. 分形信號的多小波基表示. 自然科學(xué)進(jìn)展, 2004, 14(3): 354.358.[5]閻曉紅, 劉貴忠, 劉峰. 1f信號的積分多小波變換表示. 電子與信息學(xué)報(bào), 2004, 26(10):16381644. .[6]Mariantonia C, Montefusco L B, Puccio L. Multiwavelet anlaysis and signal processing[J].IEEE Trans. on Circuits and Systems-II: Analog and Digital Signal Processing.1998, 45(8):970-[7]Chui C K, Lian J. A study of orthonormal multi-wavelets[J].J. Applied Numerical Mathematics.1996, 20(3):273-[8]Qingtang Jiang. Orthogonal multiwavelets with optimum time-frequency resolution[J].IEEE Trans. on Signal Processing.1998, 46(4):830- -
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