Minimizing the energy per bit for pilot-assisted data transmission over quantized channels
Minimizing the energy per bit for pilot-assisted data transmission over quantized channels
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DOI：
10.1109/pimrc.2014.7136137
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
Qing Bai;U. Mittmann;A. Mezghani;J. Nossek
中科院分区：
文献类型：
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作者：
Qing Bai;U. Mittmann;A. Mezghani;J. Nossek
为了在先验未知信道上进行通信，可以利用导频序列来帮助接收机获得信道状态信息。接收机前端的模数转换器（ADC）对输入信号进行采样和量化，包括导频和数据符号。这导致接收信噪比（SNR）的降低以及信道估计质量的恶化，信道估计质量在数量上取决于ADC所使用的位分辨率。在这项工作中，我们考虑点到点，基于训练的通信之间的单天线发射机和多天线接收机在瑞利块衰落信道，并考虑到ADC的联合优化的训练长度，平均接收SNR，接收天线的数量，和ADC的位分辨率的影响。优化的目标是最小化每比特能量指标，其中我们将ADC的发射功率和功耗都包括在能耗模型中，并采用取决于所有上述设计参数的容量下限。数值模拟的结果进行了演示和分析，导致一些有见地的意见和结论，这是重要的系统的能源效率的操作。
To communicate over a priori unknown channels, pilot sequences can be exploited to assist the receiver in obtaining the channel state information. The analog-to-digital converter (ADC) at the front end of the receiver samples and quantizes the input signal, including both pilot and data symbols. This results in a reduction of the receive signal-to-noise ratio (SNR) as well as deteriorated quality of channel estimation, which depends quantitatively on the bit resolution used by the ADC. In this work, we consider the point-to-point, training based communication between a single-antenna transmitter and a multi-antenna receiver over a Rayleigh block fading channel, and take into account the impact of the ADC for a joint optimization of the training length, the average receive SNR, the number of receive antennas, and the bit resolution of the ADC. Goal of the optimization is to minimize the energy per bit metric, where we include both transmit power and power dissipation of the ADC into the energy consumption model, and employ a capacity lower bound which depends on all aforementioned design parameters. Results from numerical simulations are demonstrated and analyzed, leading to a number of insightful observations and conclusions which are important for the energy efficient operation of the system.