SYSTEMS/METHODS OF ADAPTIVELY VARYING A SPECTRAL CONTENT OF COMMUNICATIONS
First Claim
1. A communications method comprising:
- mapping information into a baseband waveform; and
varying a spectral content of the baseband waveform, without resorting to chipping, by using for said mapping first and second waveform elements that differ therebetween in spectral content.
2 Assignments
0 Petitions
Accused Products
Abstract
A spectral content of a baseband waveform is varied and a measure of the baseband waveform whose spectral content has been varied is used by a transmitter in order to convey information. According to embodiments of inventive concepts, a set of frequencies that is used to provide spectral content to the baseband waveform is varied. In some embodiments, the spectral content comprises non-contiguous first and second frequency intervals wherein a third frequency interval that is between the first and second frequency intervals remains substantially devoid of providing spectral content in order to reduce or avoid interference. In other embodiments, the spectral content that is varied comprises a bandwidth that is varied. The inventive concepts are relevant to 4G LTE carrier aggregation systems/methods and/or other aspects of 4G LTE. Various transmitter/receiver embodiments are disclosed including direct synthesis transmitter/receiver embodiments.
15 Citations
66 Claims
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1. A communications method comprising:
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mapping information into a baseband waveform; and varying a spectral content of the baseband waveform, without resorting to chipping, by using for said mapping first and second waveform elements that differ therebetween in spectral content. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A communications method comprising:
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processing a waveform that comprises a variable spectral content and is devoid of chipping by using first and second waveform elements that differ therebetween in bandwidth; and mapping the waveform that was processed into an information sequence. - View Dependent Claims (14, 15, 16, 17)
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18. A communications method comprising:
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mapping information that is to be transmitted into a baseband waveform; varying a spectral content of the baseband waveform, without resorting to chipping, by using for said mapping first and second waveform elements that differ therebetween in spectral content; processing a waveform that comprises a variable spectral content and is devoid of chipping by using first and second waveform elements that differ therebetween in bandwidth; and mapping the waveform that was processed into a received information sequence. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A communications system comprising:
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a processor that is configured to perform operations comprising; mapping information into a baseband waveform; and varying a spectral content of the baseband waveform, without resorting to chipping, by using for said mapping first and second waveform elements that differ therebetween in spectral content. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A communications system comprising:
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a processor that is configured to perform operations comprising; processing a waveform that comprises a variable spectral content and is devoid of chipping by using first and second waveform elements that differ therebetween in bandwidth; and mapping the waveform that was processed into an information sequence. - View Dependent Claims (47, 48, 49, 50)
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51. A communications system comprising:
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a processor that is configured to perform operations comprising; mapping information that is to be transmitted into a baseband waveform; varying a spectral content of the baseband waveform, without resorting to chipping, by using for said mapping first and second waveform elements that differ therebetween in spectral content; processing a waveform that comprises a variable spectral content and is devoid of chipping by using first and second waveform elements that differ therebetween in bandwidth; and mapping the waveform that was processed into a received information sequence. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification