Asynchronous Multitrack Detection With a Generalized Partial-Response Maximum-Likelihood Strategy
Asynchronous Multitrack Detection With a Generalized Partial-Response Maximum-Likelihood Strategy
复制标题
采用广义部分响应最大似然策略的异步多轨检测
DOI：
10.1109/tcomm.2021.3135864
复制
发表时间：
2022
影响因子：
8.3
通讯作者：
Barry, John R.
中科院分区：
文献类型：
--
作者：
Banan Sadeghian, Elnaz;Barry, John R.
磁记录中单轨检测的行业标准是部分响应均衡，然后是基于网格的序列检测器。我们首次将部分响应范例扩展到多轨检测的情况，此时联合检测的多个轨是异步写入的，具有不同的位相位和位速率。我们提出了一种多输入多输出 (MIMO) 部分响应均衡器，它将多个读回波形的不同步样本均衡到时变 MIMO 目标，从而实现基于网格的旋转目标 (ROTAR) 检测器来解决异步问题。我们在二维磁记录通道上评估了所提出的均衡策略，发现所提出的接收器优于一次检测一个磁道的传统接收器，误码率降低了 30%，并且它与磁道完全同步的虚拟系统的性能非常匹配。
The industry standard for single-track detection in magnetic recording is partial-response equalization followed by a trellis-based sequence detector. We extend for the first time the partial-response paradigm to the case of multitrack detection when the multiple tracks being jointly detected were written asynchronously, with different bit phases and bit rates. We propose a multiple-input multiple-output (MIMO) partial-response equalizer that equalizes the unsynchronized samples of the multiple readback waveforms to a time-varying MIMO target, thereby enabling a trellis-based rotating-target (ROTAR) detector that accounts for the asynchrony. We evaluate the proposed equalization strategy on a two-dimensional magnetic-recording channel, and find that the proposed receiver outperforms a conventional receiver that detects one track at a time, by a 30% reduction in the bit-error rate, and that it closely matches the performance of a fictitious system in which the tracks are perfectly synchronous.