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Subcarrier and power allocation method and system for uplink ofdm system

An allocation method and system sub-technology, applied in the field of communication, can solve problems such as system performance impact, affecting subcarrier allocation, unreasonable subcarrier and power allocation, etc., and achieve the effect of reducing computational complexity, improving efficiency and rationality

Active Publication Date: 2018-01-05
GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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Problems solved by technology

This cannot guarantee that the obtained power allocation is optimal, which seriously affects the allocation of subcarriers in the next iteration, and eventually leads to unreasonable allocation of subcarriers and power, and the system performance is greatly affected

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  • Subcarrier and power allocation method and system for uplink ofdm system
  • Subcarrier and power allocation method and system for uplink ofdm system
  • Subcarrier and power allocation method and system for uplink ofdm system

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] The following uses the KKT (Karush-Kuhn-Tucker) optimal condition as an example to allocate subcarriers; at the same time, use the Fenchel dual principle to allocate power to the subcarriers allocated to each user, and obtain the subcarrier and power allocation scheme of the uplink OFDM system .

[0024] see figure 1 As shown, a subcarrier and power allocation method of an uplink OFDM system comprises the following steps:

[0025] Step S101, obtaining the fairness weights of each user in the cell, the maximum power constraint information and the channel signal-to-noise ratio of each user o...

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Abstract

The invention provides an uplink OFDM system subcarrier and power distribution method and system. The method comprises the following steps: the fairness weight of each user in a cell, the maximum power constraint information and the channel signal-to-noise ratio of each user on a corresponding subcarrier are acquired; a hybrid variable optimization problem is established according to each fairness weight, the channel signal-to-noise ratio and the maximum power constraint information; iterative calculation is performed on the subcarrier distribution information and power configuration information according to the hybrid variable optimization problem; and distribution is performed on the subcarriers and the power separately according to the result of the iterative calculation. According to the invention, subcarrier and power distribution can be performed fast and effectively.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an uplink OFDM system subcarrier and power allocation method and an uplink OFDM system subcarrier and power allocation system. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiplexing) is a wireless communication system standard and a multiple access technology. Both WiMax and LTE support OFDMA. At present, the OFDMA technology has been extensively studied and has become the mainstream multiple access scheme of the downlink of 3GPP LTE. Resource allocation plays an important role in optimizing OFDMA system performance. Usually, one of the main metrics for radio resource allocation is spectrum efficiency. At the same time, energy efficiency has attracted more and more attention in the design of communication systems. [0003] There are already many technical solutions for the uplink OFDM system...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W52/04
Inventor 丁胜培肖恒辉李炯城陈运动赖志坚
Owner GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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