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为提高现有部分响应正交频分复用系统抗噪声性能,提出改进的部分响应正交频分复用系统.建立相关编码与卷积的关系,相关编码可等效于快速傅里叶逆变换(IFFT)之后的一个脉冲成形滤波器.把滤波器一分为二,将其中一个搬移到接收机一侧,从而获得最佳或准最佳的接收.无线衰落信道仿真结果表明,改进的部分响应正交频分复用系统较传统正交频分复用系统和现有部分响应正交频分复用系统信噪比提高约1.9dB.
In order to improve the anti-noise performance of the existing partial response Orthogonal Frequency Division Multiplexing system, an improved partial response Orthogonal Frequency Division Multiplexing (OFDM) system is proposed.The relationship between coding and convolution is established, and the correlation coding is equivalent to Fast Fourier Transform A pulse shaping filter after the transform (IFFT) The filter is split in half and one is moved to the receiver side for best or quasi-optimal reception The simulation results of the wireless fading channel show that the improved The SNR of partial response Orthogonal Frequency Division Multiplexing system is 1.9dB higher than that of the traditional Orthogonal Frequency Division Multiplexing system and existing Partial Response Orthogonal Frequency Division Multiplexing system.