Apparatus and method for grey encoding modulated data
First Claim
1. A method comprising:
- encoding an input data stream based on a plural bit symbol alphabet, the symbol alphabet defined such that transmitted symbol waveforms having an adjacent transition represent bit sequences that differ by a single bit; and
transmitting a modulated signal, the modulated signal including a symbol waveform to represent each digital symbol within the encoded data stream.
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Accused Products
Abstract
A method and apparatus for grey encoding modulated data are described. In one embodiment, the method includes encoding of an input data stream to form an encoded data stream according to a symbol alphabet. In one embodiment, a modulated signal is produced from the encoded data stream. In one embodiment, the modulated signal includes a distinct symbol waveform to represent each symbol within the encoded data stream. In one embodiment, waveforms included in the modulated signal, which have adjacent transitions, represent symbols that differ by a single bit. In one embodiment, bit error rate is improved by encoding the phase positions in an edge position modulation system with grey encoding. Other embodiments are described and claimed.
25 Citations
29 Claims
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1. A method comprising:
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encoding an input data stream based on a plural bit symbol alphabet, the symbol alphabet defined such that transmitted symbol waveforms having an adjacent transition represent bit sequences that differ by a single bit; and
transmitting a modulated signal, the modulated signal including a symbol waveform to represent each digital symbol within the encoded data stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
modulating input data encoded according to a plural bit symbol alphabet using a plurality of symbol waveforms, the symbol alphabet defined using single distance digital symbols, wherein symbol waveforms having an adjacent transition represent adjacent digital symbols, such that each two adjacent symbols represent bit sequences that differ by only one bit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus, comprising:
a controller having an interface to modulate an input data stream encoded according to plural bit symbol alphabet using a plurality of symbol waveforms, the symbol alphabet defined such that symbol waveforms having an adjacent transition represent bit sequences that differ by only one bit. - View Dependent Claims (22, 23, 24, 25)
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26. A system comprising:
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a processor;
a chipset coupled to the processor, the chipset including a memory interface having a transceiver including at least one modulator to modulate an input data stream encoded according to plural bit symbol alphabet using a plurality of symbol waveforms, the symbol alphabet defined using single distance digital symbols, wherein symbol waveforms having adjacent transitions represent adjacent digital symbols such that each two adjacent digital symbols represent bit sequences that differ by one bit; and
a memory coupled to the chipset and having a transceiver including at least one demodulator to receive a symbol encoded by the modulator and to decode the symbol according to at least one time position value. - View Dependent Claims (27, 28, 29)
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Specification