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Transpositional modulation systems and methods

A technique for modulating signals and periodic waveforms, applied in the field of signal processing

Inactive Publication Date: 2016-01-20
TM IP HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of early methods of generating these types of waveforms was the need to adjust the circuitry to remove small amplitude variations

Method used

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  • Transpositional modulation systems and methods
  • Transpositional modulation systems and methods
  • Transpositional modulation systems and methods

Examples

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Embodiment Construction

[0041] Many embodiments of the invention may take the form of computer-executable instructions, including algorithms, executed by a programmable computer or microprocessor. However, the invention may also be practiced using other computer system configurations. Certain aspects of the invention may be embodied in a special purpose computer or data processor specially programmed, configured or constructed to perform one or more of the methods or algorithms described below.

[0042] Aspects of the present invention described below may be stored or distributed on computer readable media, including magnetically and optically readable and removable computer diskettes, fixed diskettes, floppy disk drives, optical disk drives, magneto-optical disk drives, magnetic tape, hard disk drives (HDD ), solid-state drives (SSD), compact flash or non-volatile memory, and electronic distribution over networks including the cloud. In particular, data structures and data transfers of aspects of t...

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Abstract

Systems and methods for transpositional modulation and demodulation are provided. One such method for generating a signal includes the steps of providing a look-up table having a plurality of quarter-cycle waveforms, each of said quarter-cycle waveforms associated with a respective input level; receiving an input signal; and outputting quarter-cycle waveforms associated with levels of the received input signal. Systems for transpositional modulation are also provided. One such system for generating a signal includes a look-up table having a plurality of quarter-cycle waveforms. Each of the quarter-cycle waveforms are associated with a respective input level, and the look-up table is configured to receive an input signal, and output quarter-cycle waveforms associated with levels of the received input signal.

Description

technical field [0001] The present invention relates generally to signal processing, and more particularly to systems and methods for generating transposition modulated signals, and for demodulating transposition modulated signals. Background technique [0002] Existing transmission systems that carry voice, video or data have bandwidth limitations imposed by national and international regulatory agencies that control spectrum utilization. Carrier modulation methods have evolved from the original amplitude modulation to current methods that combine two or more carriers with amplitude, frequency or phase modulation in different combinations. Advanced carrier modulation methods have been developed to maximize the energy throughout the allocated channel bandwidth, thereby providing the maximum available information bandwidth for the allocated communication channel. [0003] A new fundamental carrier modulation was developed and first issued (see, e.g., U.S. Patent No. 4,613,97...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/64H03C7/02
CPCH03C7/02H04J11/004H04L27/00H04L27/3461
Inventor 理查德·C·格迪斯
Owner TM IP HLDG LLC