1·If the length of its cyclic prefix is larger than the delay spread of transmission channel, we can get a simple frequency equalizer to demodulate OFDM signal.
对于传统的OFDM系统来说，如果循环前缀的长度大于信道的时延扩散值，则可以通过简单的频域均衡来解调OF DM信号。
2·The ML7338(ARM7TDMI core) and RF module RDA5206 are used to demodulate RF signals, recode, remodulate and transmit baseband signals, thus solving the RF interference problem in traditional stations.
该系统主要采用小灵通基带芯片ML7338（ARM7TDMI核）和RDA5206射频模块，实现对射频信号的解调，同时对基带信号重新编码再调制发射，很好地解决了普通直放站射频干扰问题。
3·Sample synchronization is a basic problem whether Software Radio Receiver systems can demodulate the received signal correctly, it also affects the performance of the system.
软件无线电接收机是否能正确的解调接收信号，样值同步是需要解决的基本问题之一，其好坏将直接影响系统性能。
4·In order to demodulate optic fiber Fabry-Perot sensors multiplexed in parallel with high accuracy and absolute cavity length, an improved cross-correlation demodulation method is proposed.
为了实现光纤法-珀传感器并联复用信号的高精度、绝对腔长解调，提出了一种改进的互相关解调法。
5·Realizes V. 29 signal basic modulate and demodulate procedure which includes square root raised cosine rolling-off shaping filter and orthogonal channel signal modulator and demodulator.
分别实现了V．29信号基本调制解调过程，包括平方根升余弦滚降脉冲成形技术的滤波器实现，以及对信号的正交调制与解调过程。