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    • 8. 发明申请
    • Method for bit-byte synchronization in sampling a data string
    • 数据串采样中位字节同步的方法
    • US20050265493A1
    • 2005-12-01
    • US10856706
    • 2004-05-28
    • Mario BlaumRichard NewBruce Wilson
    • Mario BlaumRichard NewBruce Wilson
    • G11B20/10H04L7/00H04L7/02H04L7/04H04L25/497H04L27/06
    • G11B20/10009G11B20/10046H04L7/0066H04L7/04H04L25/497
    • Bit and byte synchronization for sampling and decoding a data string is provided a single data field u. The data string x has pre-pended to it a short string of is (ones), followed by u to yield a string y= . . . 1111, u, x. The string is pre-coded by convolution with 1/(1⊕D2). PRML-sampling of y starts at an initial phase, and vectors are obtained from that string by sampling at pre-selected phases following the initial sampling point. The vectors of y are compared with vectors corresponding to PRML samples of an initial set of bits in u obtained at predetermined phases. The pair of y, u vectors exhibiting the minimum Euclidian distance yields a sampling correction value by which the initial sampling phase is corrected and a new initial sampling point preceding x is determined. Here, bit and byte synchronization have been achieved and sampling of x proceeds at the corrected phase, from the new initial sampling point.
    • 为数据串采样和解码的位和字节同步提供单个数据字段u。 数据串x已经预先提供了一个短串的(1),其次是u得到一个字符串y =。 。 。 1111,u,x。 该字符串通过卷积与1 /(1⊕D 2 )进行预编码。 y的PRML采样从初始阶段开始,并且通过在初始采样点之后的预选阶段进行采样从该串中获得向量。 将y的向量与对应于在预定阶段获得的u的初始位组的PRML样本相对应的向量进行比较。 呈现最小欧几里德距离的一对y,u向量产生采样校正值,通过该取样校正值校正初始采样相位,并且确定x之前的新的初始采样点。 这里,已经实现了比特和字节同步,并且从新的初始采样点在校正阶段进行x的采样。