发明名称 |
PULSE AMPLITUDE MODULATION CIRCUIT WITH PULSE WIDTH EQUALIZATION |
摘要 |
In pulse width control equalization, attention is paid to the existence of the symmetry of anteroposterior signals and thereby the size of a table in which the adjustment amount of an edge position is stored is reduced to the power of one-half. Pattern jitters caused by inter-symbol interference are suppressed. The pulse time span of each symbol is adjusted to an optimum pulse width determined by a calculating formula or search in a table in response to a code sequence to be transmitted. In the configuration wherein a table is used, the table to store an edge position adjustment amount wherein the row of the exclusive OR of two symbols located at positions symmetrical to each other before and after a center symbol now ready to be sent in the code sequence is used as a search key is made.
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申请公布号 |
US2008056342(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
US20070782705 |
申请日期 |
2007.07.25 |
申请人 |
FUJUDA KOJI;TOYODA HIDEHIRO;YAMASHITA HIROKI |
发明人 |
FUJUDA KOJI;TOYODA HIDEHIRO;YAMASHITA HIROKI |
分类号 |
H03H21/00 |
主分类号 |
H03H21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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