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Low-complexity power control method based on discontinuous carrier OFDM system

A technology of power control and low complexity, applied in multi-carrier systems, power management, multi-frequency code systems, etc., to achieve the effect of high communication rate requirements

Inactive Publication Date: 2010-12-01
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amplitude attenuation of the power spectrum side lobes of each order in the OFDM system does not strictly satisfy the equidistant cloud ladder distribution

Method used

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  • Low-complexity power control method based on discontinuous carrier OFDM system
  • Low-complexity power control method based on discontinuous carrier OFDM system
  • Low-complexity power control method based on discontinuous carrier OFDM system

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Embodiment Construction

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Abstract

The invention discloses a low-complexity power control method based on a discontinuous carrier OFDM system, which adopts the second-degree parabola to replace the linear function to simulate the amplitude attenuation proportion of the power spectrum side lobe of each order of the discontinuous carrier OFDM system for power control according to the square proportion. The method comprises the following steps: (1), an order is determined; (2), the position of an available subcarrier in a spectrum pool is determined; (3), the out-of-band radiation interference information of a secondary user is fitted according to the order, and the total power is taken as the extreme water injection and distribution transmitting power; and (4), the channel capacity and the consumed power of an NC-OFDM systemare counted by statistics. The invention self-adaptively loads the transmitting power of all the subcarriers on the premise that the interference power of the secondary user to the major user is limited, meets the requirement of the highest communication speed and enables the channel capacity of the discontinuous carrier OFDM system to be maximized.

Description

Low Complexity Power Control Method Based on Discontinuous Carrier OFDM System technical field The invention relates to an adaptive power control method of a discontinuous carrier OFDM (orthogonal frequency division multiplexing) system, belonging to the technical field of wireless communication. Background technique In a Dynamic Spectrum Access (Dynamic Spectrum Access) network (also known as a cognitive radio network), a secondary user obtains a dynamic access opportunity to perform communication transmission under the condition that the authorization does not cause interference to the primary user. The "spectrum pool" (Spectrum Pooling) strategy proposed by Timo.A.Weiss can effectively improve the efficiency of spectrum use, that is, after the secondary user is authorized, he can use the frequency band in the unified spectrum pool that is not occupied by the primary user, which can be more efficient. Effectively utilize the entire target frequency band. At the same tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/32H04W52/26H04L27/26
Inventor 袁东风杨子原
Owner SHANDONG UNIV
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