求翻译：限幅相当于对原始信号加一矩形窗，如果OFDM信号的幅值小于预先给定的门限值时，该矩形窗函数的幅值就为1，否则，矩形窗函数的幅值就小于1。是什么意思？

Limit is equivalent to the original signal plus a rectangular window, if the OFDM signal amplitude is less than the pre-specified threshold, the amplitude of the rectangular window function is 1, otherwise, the amplitude of the rectangular window function is less than 1.

Limit is equivalent to the original signal plus a rectangular window OFDM signal, if the increase in advance to set the threshold value is less than the value of the rectangle window function to increase value to 1, otherwise, rectangular window in the bottom of the function value is less than 1.

The restriction is equal in adds a rectangular window to the primary signal, if the OFDM signal peak-to-peak value is smaller than time the threshold value which assigns in advance, this rectangular window box number peak-to-peak value is 1, otherwise, the rectangular window box number peak-to-peak

Limiting the equivalent to the original signal plus a rectangular Windows, if the OFDM signal amplitude is less than the advance of the given threshold value, the amplitude of the rectangular window function is 1, otherwise, the rectangular window function of the amplitude is less than 1.

Limit is equivalent to the original signal plus a rectangular window, if the OFDM signal amplitude is less than the pre-specified threshold, the amplitude of the rectangular window function is 1, otherwise, the amplitude of the rectangular window function is less than 1.