In millimeter-wave (mmWave) wireless communications, the duration of the channel estimation plays a major role to establish the links before data transmission. However, fixed or long channel estimation can substantially hinder the achievable transmit data rates. In this letter, we propose a new scheme that optimizes the channel estimation duration to establish the link between the base station (BS) and a mobile station (MS) in mmWave communications. Before pilot transmissions, the BS predicts the downlink effective rate that would be achieved after channel estimation with the pilot precoder and compares this predicted rate with the current rate, based on the current channel estimates. The proposed scheme optimizes the mmWave channel estimation duration by ending pilot transmissions when the predicted rate is lower than the current rate.

中文翻译：

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通过速率预测优化毫米波信道估计持续时间

在毫米波（mmWave）无线通信中，信道估计的持续时间在数据传输之前建立链路方面起着重要作用。但是，固定或长信道估计会严重阻碍可达到的发射数据速率。在这封信中，我们提出了一种优化信道估计持续时间的新方案，以在毫米波通信中建立基站（BS）与移动站（MS）之间的链接。在导频传输之前，BS使用导频预编码器预测在信道估计之后将实现的下行链路有效速率，并且基于当前信道估计将该预测速率与当前速率进行比较。当预测速率低于当前速率时，该方案通过结束导频传输来优化毫米波信道估计持续时间。