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US 7,480,330 B2Granted
Method and apparatus to perform modulation using integer timing relationships between intra symbol modulation components
AssigneeIntel Corporation
InventorLarry R. Tate
Life of this patent
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Abstract
A method and apparatus to improve modulation efficiency for chip to chip interconnects. Modulation objects that are integer multiples of a fundamental time unit (FTU) are used to populate a symbol period that is also an integer multiple of the FTU. A possible symbol set is established as the set in which the modulation object occupies every possible combination of slots within the symbol period. By permitting the modulation object to overlap positions in different symbols of the set, greater modulation efficiency is achieved.
Claims13
A method comprising:
- defining a phase modulation component (PMC) of a modulation symbol as an integer multiple of fundamental time units (FTU's);
- defining a set of modulation symbols in which a PMC in one symbol may overlap a position of a PMC in another symbol;
- and
- encoding data as at least one symbol of the set.
1 more element
An apparatus comprising:
- mapping logic to generate a plurality of control signals to control edge transitions in a modulation symbol;
- and
- a plurality of delay elements coupled to a clock to ensure transition in the modulation symbol occur at integer multiples of a fundamental time unit (FTU).
Dependencies are inferred from the claim text.