.png){kind=icon}
返回
Zero-Crossing Precoding Techniques for Channels With 1-Bit Temporal Oversampling ADCs
.png){kind=icon}
PRE
AI
DOI：10.1109/TWC.2022.3233320.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
A promising approach to reducing the energy consumption is to consider coarse quantization at the receiver. In this study, we investigate novel precoding techniques in space and time for bandlimited multiuser MIMO downlink channels with 1-bit quantization and oversampling at the receiver, considering zero-crossing modulation. The proposed time-instance zero-crossing modulation conveys the information into the time-instances of zero-crossings. Two design criteria for time-instance zero-crossing modulation are investigated, namely, the minimum distance to the decision threshold and the mean-square error between the received and the desired signal. The maximization of the minimum distance to the decision threshold can be formulated as a quadratically constraint quadratic program. As an alternative, an equivalent problem can be formulated based on power minimization, which reduces computational complexity. Departing from the conventional mean-square error based technique, a more sophisticated algorithm is developed, which implies active constellation extension in order to improve the performance at high SNR. The extended problem is solved with two approaches, namely by formulating the problem as a second-order cone program and by considering an alternating optimization algorithm. Numerical results show that the proposed time-instance zero-crossing precoding methods significantly improve the bit error rate compared to the state-of-the-art methods.
Keyword:
Index Terms-1-bit quantization
oversampling
precoding
ADC
MSE
期刊
IF:
10.7
论文数:
1.3W
被引数:
5.3W
机构
引用论文
Channel Estimation for Large-Scale Multiple-Antenna Systems Using 1-Bit ADCs and Oversampling.png)
IEEE ACCESS
OAAI
IEEE ACCESSIF3.6
OAAI分享收藏Resource Allocation for Wireless-Powered IoT Networks With Short Packet Communication基于短分组通信的无线物联网网络资源分配
PREAI
分享收藏Massive MIMO Precoding and Spectral Shaping With Low Resolution Phase-Only DACs and Active Constellation Extension具有低分辨率纯相位dac和主动星座扩展的大规模MIMO预编码和频谱整形
OAAI
OAAI分享收藏
查看更多内容