Hierarchical modulation for communication channels in single-carrier frequency division multiple access

A communication channel, layered modulation technology, applied in signal channels, multi-carrier systems, phase-modulated carrier systems, etc., can solve problems such as far away

Inactive Publication Date: 2010-03-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the above methods are far from providing a complete and efficient solution to the problem of simultaneously transmitting multiple channels

Method used

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  • Hierarchical modulation for communication channels in single-carrier frequency division multiple access
  • Hierarchical modulation for communication channels in single-carrier frequency division multiple access
  • Hierarchical modulation for communication channels in single-carrier frequency division multiple access

Examples

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Embodiment Construction

[0032] Various embodiments are now described with reference to the drawings, wherein like reference numerals refer to like elements herein. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the described embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0033] As used in this application, "component," "module," "system" and similar terms are intended to refer to a computer-related entity, such as hardware, firmware, a combination of hardware and software, software, or software in execution. By way of example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or...

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Abstract

System(s) and method(s) are provided to transmit simultaneously a first and a second communication channel in a single-carrier waveform format with disparate error rate requirements. First channel and second channel are coded individually to form an alphabet for a first and second constellation. Prior to transmission, bits of information of the first and second channels are modulated with a hierarchical modulation constellation is generated through a combination of a first a second constellation; each constellation is assigned a configurable weight (e.g., a ''hierarchic weight'') that is expressed in terms of a configurable energy ratio. The energy ratio determines the resilience of bits associated with the first and second channel. Bit mapping within the first and second constellation provides redundancy to mitigate error rate within each quadrant of the hierarchical constellation. Hierarchical modulation of more than two channel can be accomplished through the same principal of individual coding and constellation composition.

Description

[0001] Priority claim based on 35 U.S.C. §119 [0002] This patent application claims priority to US Provisional Application No. 60 / 942,980, filed June 8, 2007, entitled "HIERARCHICALMODULATION BASED CONTROL CHANNEL FOR SC-FDMA." The entire content of this application is expressly incorporated herein by reference. technical field [0003] The following description relates generally to wireless communications and, in particular, to layered modulation of multiple communication channels simultaneously transmitted over a single carrier. Background technique [0004] Wireless communication systems have become an almost ubiquitous method for transmitting voice and data (eg, video and audio streaming, file transfer, web browsing, etc.). Emergence of emerging markets for wireless communications, increasing complexity of user requirements, and competition among network operators have driven tremendous advances in wireless technology at both the user equipment and network levels. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/02H04L27/18H04L27/26H04L27/34
CPCH04L27/2604H04L27/183H04L5/023H04L27/3488H04B7/0413H04B7/0623H04B7/063H04B7/0632H04B7/0639
Inventor D·P·马拉蒂
Owner QUALCOMM INC
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