Adaptative Multi-Carrier Code Division Multiple Access
a multi-carrier code and code technology, applied in the field of communication signal processing, can solve the problems of high cost to achieve high throughput, difficulty in achieving high performance, and increasing performance such as beyond 9 bit/hz, and achieve the effect of low implementation cos
Inactive Publication Date: 2011-04-07
AVAGO TECH WIRELESS IP SINGAPORE PTE
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
AMC-CDMA provides adaptive modulation for multiple network nodes, reduces implementation costs, and enhances robustness against channel impairments and frequency selective channels, allowing multiple users to share frequencies or codes, while maintaining low power spectral density and latency.
Problems solved by technology
One limitation with CDMA is the difficulty in achieving high performance due to channel impairments.
One limitation with OFDM is the high cost to achieve this high throughput.
In this example, there is high spectral efficiency but increasing performance such as beyond 9 bit / Hz increases costs.
One limitation is that high performance cannot be achieved due to channel impairments.
Method used
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[0017]The embodiments discussed herein are illustrative of one example of the present invention. As these embodiments of the present invention are described with reference to illustrations, various modifications or adaptations of the methods and / or specific structures described may become apparent to those skilled in the art. All such modifications, adaptations, or variations that rely upon the teachings of the present invention, and through which these teachings have advanced the art, are considered to be within the scope of the present invention. Hence, these descriptions and drawings should not be considered in a limiting sense, as it is understood that the present invention is in no way limited to only the embodiments illustrated.
[0018]A system for performing adaptative multi-carrier code division multiple access (AMC-CDMA) includes first circuitry and modulator circuitry. The first circuitry determines a channel performance metric for each of a plurality of channels. The first ...
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A system for performing adaptative multi-carrier code division multiple access (AMC-CDMA) includes first circuitry and modulator circuitry. The first circuitry determines a channel performance metric for each of a plurality of channels. The first circuitry determines at least one parameter of bit loading for each of the channels based on the channel performance metric. The modulator circuitry modulates AMC-CDMA signals using the parameters for bit loading in each of the channels for transmission over a wired connection.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Continuation of U.S. patent application Ser. No. 11 / 482,373, entitled “Adaptative Multi-Carrier Code Division Multiple Access,” filed Jul. 6, 2006 which is incorporated herein by reference. This application is also related to U.S. patent application Ser. No. 12 / 771,805, entitled “Adaptative Multi-Carrier Code Division Multiple Access,” filed Apr. 30, 2010 which is a Continuation-in-Part of U.S. patent application Ser. No. 11 / 482,373.BACKGROUND[0002]1. Technical Field[0003]The present invention relates generally to communication signal processing and more particularly to systems and methods for adaptative multi-carrier code division multiple access.[0004]2. Description of Related Art[0005]Code Division Multiple Access (CDMA) encodes data with a special code for each channel. CDMA provides greater capacity and security in a variety of communications systems such as radio systems, networking systems, and wireless commun...
Claims
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IPC IPC(8): H04L12/26
CPCH04B3/54H04B2203/5416H04B2203/5425H04J11/003H04J13/0022H04J13/0077H04L27/3411H04L5/0021H04L5/0046H04L5/006H04L5/0085H04L25/0216H04L27/0008H04L1/0003
InventorMOLINA, JOSE ABADINSUA, JUAN CARLOS RIVEIROHURWITZ, JONATHAN EPHRAIM DAVID
OwnerAVAGO TECH WIRELESS IP SINGAPORE PTE