Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems

A wireless communication system and multi-carrier modulation technology, applied in the field of data communication, can solve problems such as the inability to apply multi-carrier communication systems

Active Publication Date: 2006-07-12
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These various conventional schemes for reducing PAPR cannot be applied to some multi-carrier communication systems

Method used

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  • Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems
  • Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems
  • Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 A diagram of a wireless multiple-access communication system 100 employing multi-carrier modulation is shown. The system 100 includes a number of access points 110 that communicate with a number of terminals 120 (for simplicity, figure 1 Only two access points 110a and 110b are shown in . An access point is a fixed station used to communicate with the terminal. An access point may also be called a base station or some other terminology.

[0022] A terminal is a station that communicates with the access point. A terminal may also be called an access terminal, user terminal, remote station, mobile station, wireless communication device or some other terminology. Each terminal may communicate with one or more access points on the downlink and / or uplink at any given moment. The downlink (ie, forward link) refers to transmissions from access points to terminals, and the uplink (ie, reverse link) refers to transmissions from terminals to access points.

[0023]...

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PUM

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Abstract

Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

Description

technical field [0001] The present invention relates generally to data communications, and in particular to methods for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Background technique [0002] Wireless communication systems are widely deployed to provide various types of communications such as voice, data, and so on. The system may be a multiple-access system capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.). Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems. [0003] Wireless communication systems may employ multi-carrier modulation for data transmission. Common examples of multi-carrier modulation include Orthogonal Fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/00H04Q7/20H04B7/005H04L5/02H04L27/26H04W52/34H04W72/04
CPCH04L5/0007H04W52/367H04L27/2614H04L5/0066Y02B60/50H04W72/0453H04W52/343H04L5/0037
Inventor R·维贾亚恩A·阿格拉瓦尔S·K·杰哈
Owner QUALCOMM INC
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