Carrier interferometry coding and multicarrier processing

A carrier and processor technology, applied in the direction of modulated carrier system, multi-frequency code system, multiplex communication, etc., can solve problems that do not involve the phase relationship of orthogonal CI carriers

Inactive Publication Date: 2004-03-24
罗特41采购基金会有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The prior art also does not address the phase relationship between the orthogonal CI carriers to simplify the switching operation or the approximation of the switching

Method used

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  • Carrier interferometry coding and multicarrier processing
  • Carrier interferometry coding and multicarrier processing
  • Carrier interferometry coding and multicarrier processing

Examples

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Embodiment Construction

[0060] The description of the preferred embodiment assumes familiarity with CI, such as PCT Application No. PCT / US99 / 02838, PCT Application No. PCT / US00 / 18113, and Multicarrier Technology for Next Generation Multiple Access schemes by C.R. Nassar et al., Kluwer Academic Press: 2001, citing them together.

[0061] Various terms used in the description of the CI method and system are generally explained below. The descriptions in this section are for illustrative purposes only and are not limiting. The meaning of these terms will be apparent to those skilled in the art from the entire description herein. These terms may be detailed in the specification and cited references.

[0062] Carrier selection may include one or both of the following: selection of transmit-side carriers relative to one or more predetermined CI carrier parameters to produce at least one transmit signal and receive-side carrier selection to decompose the at least one signal into CI components .

[0063]...

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Abstract

Carrier Interferometry (CI) codes include families of orthogonal polyphase codes that have no length restrictions and can be used for direct-sequence and multicarrier coding. Quasi-orthogonal CI channel codes simultaneously improve probability-of-error performance and increase throughput. CI filtering (701, 702), which is based on CI codes, enables filtering and correlation operations via sampling and adding. CI codes simplify transform operations, such as Fourier transforms, by reducing or eliminating complex multiplications. CI filtering may be used to simplify synthesis and analysis functions and allow all physical-layer processing operations to be consolidated into simple sub-carrier selection and weighting operations. Thus, CI processing enables a software-defined baseband processor.

Description

[0001] This application claims priority to U.S. Patent Application No. 60 / 259,433, filed December 30,2000. technical field [0002] The present invention relates to carrier-interference measurements (CI). In particular, it concerns the application of CI to multicarrier processing, such as Fourier transform and coding. Background technique [0003] CI exploits fundamental concepts of quantum theory, which can substantially increase throughput and performance compared to conventional technologies based only on classical physics. [0004] CI was first disclosed in U.S. Patent No. 5,955,992. PCT / US00 / 18113 discloses the application of CI to coherent multiplexing and spatial interference measurements. PCT application PCT / US99 / 02838 discloses the application of CI to Direct Sequence Code Division Multiple Access (DS-CDMA). In "High Performance Bandwidth DS-CDMA with Fragment Shaping by Carrier-to-Interference Measurements" (C.R. Nassar and Z. Wu, 2000 International Forum on Adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B1/707H04J1/05H04L27/26
CPCH04L27/265H04B1/707H04L27/263H04L27/2628H04J13/12H04L27/26524H04L27/2654H04L27/2651H04L27/2634
Inventor 史蒂夫·沙提
Owner 罗特41采购基金会有限公司
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