Solving algorithm for combinatorial index in LTE-A PUSCH and DSP realization

Li Xiaowen; Zhou Yao; Zhang Aiping; Feng Youbo

doi:10.13756/j.gtxyj.2015.05.022

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Solving algorithm for combinatorial index in LTE-A PUSCH and DSP realization

- Solving algorithm for combinatorial index in LTE-A PUSCH and DSP realization
- Study on Optical communication Issue 5, Pages: 75-78(2015)
- 作者机构：
  
  重庆邮电大学重庆市移动通信技术重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2015.05.022
  CLC： TN929.5
- Published：2015，
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[1]李小文,周瑶,张爱平,冯友波.LTE-APUSCH组合索引求解算法与DSP实现[J].光通信研究,2015(05):75-78.

Li Xiaowen, Zhou Yao, Zhang Aiping, et al. Solving algorithm for combinatorial index in LTE-A PUSCH and DSP realization. [J]. (5):75-78(2015)
[1]李小文,周瑶,张爱平,冯友波.LTE-APUSCH组合索引求解算法与DSP实现[J].光通信研究,2015(05):75-78. DOI： 10.13756/j.gtxyj.2015.05.022.

Li Xiaowen, Zhou Yao, Zhang Aiping, et al. Solving algorithm for combinatorial index in LTE-A PUSCH and DSP realization. [J]. (5):75-78(2015) DOI： 10.13756/j.gtxyj.2015.05.022.

摘要

LTE-A（改进的长期演进）上行支持一种基于Clustered DFT-S-OFDM（集合式离散傅里叶变换扩展正交频分复用）的非连续频域资源分配方式

而为了在PUSCH（物理上行共享信道）中实现这种分配方式

求解组合索引成了一个关键问题。针对这个问题

文章提出一种基于组合数系统的贪婪算法

以查表的方式取代传统的全搜索算法

查找次数从O（N4）降到了O（N）。最后通过在DSP（数字信号处理器）中实现该算法

证实了该算法具有更强的可行性和有效性。

Abstract

In LTE-Advanced（LTE-A）uplinks

a non-contiguous frequency resource allocation based on clustered DFT-SOFDM is supported.In order to implement such resource allocation in PUSCH

solving the combinatorial index becomes a critical issue.With regard to this issue

this paper presents a combinatorial system-based greedy algorithm

which uses table checkup instead of the conventional full-search algorithm

reducing the number of searching times fromO（N4）to O（N）.This algorithm is realized in DSP

verifying its greater feasibility and effectiveness.

关键词

改进的长期演进物理上行共享信道资源分配组合索引数字信号处理器实现

Keywords

LTE-APUSCHresource allocationcombinatorial indexDSP realization

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