Now, a general solution is that combining STC with OFDM, but it is supposed that the channel changes slowly, so there is enough time to transmit the training sequence for channel estimation.
目前，一种普遍的解决方法是将空时码与正交频分复用（OFDM）相结合，但需要假定信道变化缓慢，从而有足够的时间通过发送训练序列来进行信道估计。
It saves time. If you normally spend an hour and a half in the gym following the traditional sequence, you'll work yourself just as hard in 45 minutes with interval training.
如果你平常花1个半小时在健身房按照传统的循序练，那么你只要通过间歇训练45分钟就可以达到同样的强度。
It saves time. If you normally spend an hour and a half in the gym following the traditional sequence, you'll work yourself just as hard in 45 minutes with interval training.
如果你平常花1个半小时在健身房按照传统的循序练，那么你只要通过间歇训练45分钟就可以达到同样的强度。
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