Back to results
US 7,453,950 B2Granted
System and method of efficiently modulating data using symbols having more than one pulse
AssigneeIntel Corporation
InventorsWeimin Sun, Tao Liang
Life of this patent
Estimating the term…
Abstract
A method and apparatus to improve modulation efficiency. A symbol is created in which the relative position of a second pulse is a symbol period encode at least one bit. The symbol is transmitted across a communication channel. The one or more bits modulated by the position of the second pulse are recovered such that high bit rate communication may occur without channel compensation.
Claims21
A method comprising:
- transmitting a first pulse during a symbol period, the first pulse providing both front and back edge position modulation, wherein the first pulse has a leading slot to encode a first bit;
- and
- transmitting a second pulse during the symbol period following a gap, the second pulse moveable within the symbol period, wherein the second pulse has a leading slot and at least one lagging slot such that a position of the leading slot of the second pulse within the symbol period modulates at least one second bit, and a position of an at least one lagging slot of the first pulse in combination with a position of the at least one lagging slot of the second pulse encodes at least one third bit independent of the encoding of the first bit and the at least one second bit.
An apparatus comprising:
- a modulator to encode data as symbols, wherein each symbol includes a first pulse having a base pulse width, a leading edge and at least one lagging slot, the leading edge of the first pulse to encode at least one first bit, and a second pulse having a second base pulse width with a leading edge and at least one lagging slot, the leading edge of the second pulse positionable within a symbol period to encode at least one second bit, and a position of the at least one lagging slot of the first pulse in combination with the position of the at least one lagging slot of the second pulse encodes at least one third bit independent of the encoding of the at least one first bit and the at least one second bit.
A system comprising:
- a bus;
- a processor coupled to the bus, the processor including a modulator to encode data as symbols, each symbol including at least a first pulse, wherein the first pulse has a leading slot to encode a first bit, and a second pulse such that a position of a leading slot of a base pulse of the second pulse encodes at least one second bit, and a position of the at least one lagging slot of the first pulse in combination with a position of an at least one lagging slot of the base pulse of the second pulse encodes at least one third bit independent of encoding of the the first bit and the at least one second bit;
- a chip set coupled to the processor and including a demodulator to receive a symbol encoded by the modulator and decode at least one bit from a position of the back edge of the base pulse of the second pulse within the symbol period;
- and
- a memory device coupled to the chip set.
2 more elements
A method comprising:
- transmitting a first pulse during a symbol period, the first pulse including a leading slot and a lagging slot;
- transmitting a second pulse during the symbol period following a gap, the second pulse moveable within the symbol period, the second pulse including a leading slot and a lagging slot;
- modulating a combination of a position the lagging slot of the first pulse, a position of the leading slot of the second pulse, and a position of the lagging slot of the second pulse to encode five bits, wherein thirty-two states of modulation are provided from the five bits;
- modulating the leading slot of the first pulse to encode a sixth bit;
- encoding a seventh bit through amplitude modulation on the first pulse;
- and
- encoding an eighth bit through amplitude modulation on the second pulse.
4 more elements
Dependencies are inferred from the claim text.