卫星星载后置非线性失真消除算法

doi:10.3969/j.issn.1001-2400.2015.01.033

Abstract

Abstract:

Aimed at the fact that predistortion can not cancel the nonlinear interference and memory interference which are caused by the power amplifier in the satellite and the high order modulation of the signal, a post nonlinear interference cancellation algorithm is proposed. Based on the fact that the high order signal under the DVB-S2 has the multiple amplitude, and combined with the memory of the amplifier, the algorithm builds an adaptive nonlinear interference cancellation module to realize the linearization of the satellite's output signal. The algorithm can be used by high order modulation and it can remove the nonlinear effect of the satellite's power amplifier perfectly. Simulation results about the bit error radio, power spectrum power and constellation show that our proposed algorithm can eliminate the nonlinear and memory interference.

Key words: satellite communication, nonlinear interference cancelation, memory, nonlinear

CLC Number:

TP722

TANG Chengkai;LIAN Baowang;ZHANG Lingling. Post nonlinear interference cancelation algorithm in satellite communication[J].J4, 2015, 42(1): 207-212.

References

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Post nonlinear interference cancelation algorithm in satellite communication

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