OQAM/OFDM系统中基于信道估计的原型滤波器设计

doi:10.3969/j.issn.1001-506X.2020.01.26

Abstract

Abstract:

A method based on channel estimation is provided to design the prototype filter in the frequency selective channel of offset quadrature amplitude modulation based orthogonal frequency division multiplexing systems. Considering the low spectral efficiency of the classic preamble, an efficient preamble structure is proposed to save the frequency spectral efficiency. Channel estimation based on this new structure is also obtained. The reciprocal of the signal to interference plus noise ratio (RSINR) is derived to measure the influence of the prototype to channel estimation. After that, the problem of prototype filter design is formulated as an optimization problem under the object of minimizing the stop-band energy with constraints on the RSINR. To accelerate the convergence and obtain a global optimal solution, the box based branch and bound algorithm is utilized to solve the optimization problem. Simulation results demonstrate the validity and efficiency of the proposed method.

Key words: offset quadrature amplitude modulation based orthogonal frequency division multiplexing, channel estimation, prototype filter design, reciprocal of the signal to interference plus noise ratio (RSINR)

CLC Number:

TN929.5

Yongjin LIU, Xihong CHEN. Prototype filter design based on channel estimation for OQAM/OFDM systems[J]. Systems Engineering and Electronics, 2020, 42(1): 191-197.

Figures/Tables 5

References 25

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名称	阻带能量
IOTA	5.262 1×10^-4
文献[16]中的滤波器	4.312 6×10^-5
文献[10]中的滤波器	7.532 8×10^-5
本文设计的滤波器	8.462 7×10^-6

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Prototype filter design based on channel estimation for OQAM/OFDM systems

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