【摘 要】
：
为了解决毫米波无线通信中模数转换器(analog to digital converter,ADC)无法在接收信号上实现高倍的过采样以及多径影响所导致的定时跟踪问题,该文基于2倍过采样数据,根据相
【机 构】
：
北京交通大学轨道交通控制与安全国家重点实验室,清华大学电子工程系,信息技术国家实验室(筹),
论文部分内容阅读
为了解决毫米波无线通信中模数转换器(analog to digital converter,ADC)无法在接收信号上实现高倍的过采样以及多径影响所导致的定时跟踪问题,该文基于2倍过采样数据,根据相关波形,利用Farrow插值给出2种适用于多径信道的定时跟踪方案,分别在频域均衡之前和之后进行误差精补偿。仿真结果表明:在Rummler信道下,定时频偏为时钟频率的20×10~(-6)、误比特率为10~(-5)时,这2种方案的信噪比(signal-to-noise ratio,SNR)与无定时频偏时的只相差2.5dB左右,说明这2种方案在多径信道下具有良好的定时跟踪性能。
In order to solve the problem of timing tracking caused by high-times oversampling and multipath effects on the received signal of analog-to-digital converter (ADC) in millimeter-wave wireless communication, based on 2 times oversampled data, The relevant waveforms are given by Farrow interpolation. Two kinds of timing tracking schemes are provided for multipath channels, respectively. Error compensation is performed before and after frequency domain equalization. The simulation results show that under the Rummler channel, when the timing offset is 20 × 10 ~ (-6) and the bit error rate is 10 ~ (-5), the signal-to- noise ratio (SNR) is about 2.5 dB away from the time offset with no timing offset, indicating that these two schemes have good timing tracking performance under multipath channels.
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