matlab代码仿真ofdm系统

资 源 简 介

产生0-1随机序列 => 串并转换 => 映射 => 取共轭、过采样 % => IFFT => 加循环前缀和后缀 => 加窗 => 并串转换 => % 多径信道 => 加AWGN => 串并转换 => 去前缀 => FFT => % 下采样 => 解映射 => 求误码率

详 情 说 明

In order to generate a 0-1 random sequence, we first need to perform a series of transformations. We start by converting the sequence from parallel to serial, followed by mapping the serial sequence. To improve the accuracy of the mapping, we take the conjugate of the sequence and employ oversampling techniques.

Next, we apply the Inverse Fast Fourier Transform (IFFT) to the sequence, and add cyclic prefixes and suffixes to reduce the effect of inter-symbol interference. To further improve the signal quality, we apply a windowing function to the sequence before converting it back to parallel form.

At this point, we need to consider the impact of multipath fading on the signal. To simulate this effect, we add white Gaussian noise (AWGN) to the signal, and convert it back to serial form. We then remove the cyclic prefix and perform a Fast Fourier Transform (FFT) on the signal.

To reduce the amount of data being processed, we apply downsampling to the signal. Finally, we perform demapping to obtain the error rate. By following these steps, we can transform a random sequence into a high-quality signal that can be transmitted efficiently and accurately.