发明名称 |
Matched spectral null trellis codes for partial response channels. |
摘要 |
<p>A method is disclosed for coding input strings for a partial response channel to provide an output having a reliability determined by a preselectable coding gain. This method involves determining each frequency at which there is a zero in the transfer function of the partial response channel, and then encoding an input string into a binary code string having a power spectrum value of zero for each such frequency. A channel output sequence is generated responsively to transmission of the code string through the channel. The most probable sequence among those having a power spectrum value of zero is then calculated from the channel output sequence and decoded to provide the output.</p> |
申请公布号 |
EP0333324(A2) |
申请公布日期 |
1989.09.20 |
申请号 |
EP19890301416 |
申请日期 |
1989.02.15 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
KARABED, RAZMIK;SIEGEL, PAUL HOWARD |
分类号 |
G11B20/10;H03M13/23;H04L25/08;H04L25/49;H04L25/497 |
主分类号 |
G11B20/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|