基于比例速率约束的OFDMA-DF中继系统上行链路资源分配算法

doi:10.3969/j.issn.1000-0801.2013.04.018

Abstract

Abstract:

For orthogonal frequency division multiple access-based decode-and-forward（OFDMA-DF）relay uplinks communication system，a new algorithm with proportional fairness constraints of users’ rate was presented.The new algorithm was divided into two steps.Firstly，under equal power distribution，the user with the lowest proportional capacity had the option to pick which subcarrier and relay to use.Then，based on this basis，power allocation was optimized on subcarriers and the power allocation results were given.Analysis results demonstrate that the new algorithm can not only obtain high system capacity，but also guarantee fairness between users.

Key words: OFDMA, relay, decode-and-forward, proportional rate constraint, resource allocation

Cuiru Zhao,Youming Li,Bin Chen,Ting Zou,Xiaoqing Liu. Resource Allocation Algorithm in Uplink OFDMA-Based Decode-and-Forward Relay Systems with Proportional Rate Constraints[J]. Telecommunications Science, 2013, 29(4): 89-94.

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References 9

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参数	取值
最大多普勒频移	30 Hz
小区内半径	0.6 km
小区外半径	1 km
传输带宽W	1 MHz
中继数K	3
用户数M	8（M₀=4，M₁=4）
第1时隙总发送功率	46 dBm
第2时隙总发送功率	46 dBm
路径损耗传输模型	中继用户—中继：128.1+37.6lgd直传用户—基站：128.1+28.8lgd中继—基站：128.1+28.8lgd
目标误比特率	10^-3

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Resource Allocation Algorithm in Uplink OFDMA-Based Decode-and-Forward Relay Systems with Proportional Rate Constraints

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