Adaptive decision method for restricted band digital FM

N. Bolourchi, D. Schilling
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引用次数: 2

Abstract

A technique for the detection of narrowband multilevel continuous phase frequency shift keyed signals (CPFSK signals) is introduced. This technique is a noncoherent demodulation which utilizes a limiter-discriminator-integrator (LDI) followed by a nonlinear postprocessor to combat the intersymbol interference caused by a bandlimiting filter. The error rate performance is computed for this receiver and compared with that of the LDI receiver. The proposed system was simulated and the bit error rate (BER) performances of 2, 4, and 8-ary CPFSK schemes were obtained. The proposed technique provides improved BER performances for narrowband digital FM. Simulation results have verified the superiority of this method.<>
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限制波段数字调频的自适应决策方法
介绍了一种窄带多电平连续相移频键控信号(CPFSK)的检测技术。这种技术是一种非相干解调,它利用一个限制-鉴别-积分器(LDI)和一个非线性后处理器来对抗由带限滤波器引起的码间干扰。计算了该接收机的误码率性能,并与LDI接收机进行了比较。对所提出的系统进行了仿真,得到了2、4和8元CPFSK方案的误码率性能。该技术提高了窄带数字调频的误码率。仿真结果验证了该方法的优越性。
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