RAKE接收机对于慢移动深衰落环境更为敏感，并且上行链路在多用户情况下存在明显的误码平台。
RAKE receiver is sensitive to slow speed and deep fading condition, and there obviously exists error floor in uplink under multi-user condition.
提出一种基于信号子空间估计，用于频率选择性衰落信道的盲多用户自适应接收机。
In this paper, a blind multiuser receiver for frequency-selective fading channel based on subspace tracking has been presented.
大战爆发后，乘沙俄和其他列强势力衰落之机，日本经济势力向黑龙江地区急剧扩张。
After the breakout of the war, with tsarist Russia and other big powers declining, Japanese aggrandized rapidly their economic force towards Heilongjiang Region.
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