Therefore, it is significant to research minimum feedback rates for time-varying channels.
因此，研究时变信道下最小的反馈速率具有重要意义。
It can estimate the sampled impulse responses of unknown channels - fixed or slow time - varying channels.
它可对固定信道和慢时变信道的采样冲激响应进行估计。
The design criteria of space-time code (STC) for quasi-static fading channels, fast fading channels, and the time-varying fading channels are investigated.
对准静态衰落信道、快衰落信道以及介于两者之间的时变衰落信道下的空时码设计准则进行了研究。
The first-event error probability of STC is evaluated, and a new hybrid design criterion of space-time code for time-varying fading channels is proposed based on that probability.
考察了空时码的首事件差错概率，并基于首事件差错概率提出一种新的用于时变衰落信道的空时码混合设计准则。
The problem of channel estimation and tracking for MIMO time-varying frequency-selective channels is investigated based on training sequences.
本文主要研究了基于训练序列的多输入多输出（MIMO）时变频率选择性衰落信道的估计与跟踪问题。
The increasing of symbol duration makes OFDM more robust against multipath transmission, whereas, it makes OFDM more sensitive to the time varying of wireless mobile channels.
符号时间的增加，使得OFDM系统具有良好的抗多径性能，但同时也使OFDM系统对于无线移动信道的时变性更加敏感。
The increasing of symbol duration makes OFDM more robust against multipath transmission, whereas, it makes OFDM more sensitive to the time varying of wireless mobile channels.
符号时间的增加，使得OFDM系统具有良好的抗多径性能，但同时也使OFDM系统对于无线移动信道的时变性更加敏感。
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