Beam-Forming in Millimeter-Wave Radio System via Stochastic Approximation

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Beam-Forming in Millimeter-Wave Radio System via Stochastic Approximation

更新时间：2025-07-09

- Beam-Forming in Millimeter-Wave Radio System via Stochastic Approximation
- Vol. 45, Issue 10, Pages: 72-76(2011)
- 作者机构：
  
  西安交通大学电子与信息工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.5
- Online First：10 October 2011，
  
  Published：2011
- 稿件说明：
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Beam-Forming in Millimeter-Wave Radio System via Stochastic Approximation[J]. 2011, 45(10): 72-76.
DOI：

Beam-Forming in Millimeter-Wave Radio System via Stochastic Approximation[J]. 2011, 45(10): 72-76. DOI：

摘要

为了在60 GHz毫米波通信系统中确定收发机最优的窄波束方向使得传输速率最大

提出了一种基于波束码本的自适应波束赋形算法.该算法在室内60 GHz信道的射线跟踪模型基础上建立了离散优化问题

并引入随机逼近的全局优化算法进行求解

首先在窄波束空间中进行随机采样

再利用含噪的信道估计获得样本目标函数的无偏估计量

并据此执行自适应迭代更新

最终找到波束码本中最优的收发波束方向.相对于已有的波束赋形算法

该算法不要求收发机兼容多种宽度的天线方向图

无需精确的信道估计

且运算效率更高

适用性更强.仿真实验表明

在搜索空间规模较大时

该算法可以以相对较低的复杂度获得全局最优解或次优解

并能有效地缓解遮挡对链路产生的严重衰减

提高系统鲁棒性.

Abstract

An adaptive beam-forming algorithm is proposed based on beambook to determine the optimal beam directions for 60 GHz millimeter wave transceiver for a maximal transmission rate. Stochastic approximation algorithm is introduced to solve the discrete optimization problem that is established on the basis of the 60 GHz channel model in indoor environment by ray tracing technique. The search space spanned by the narrow beams is randomly sampled and an unbiased estimate to the objective function for each sample is acquired using the noisy channel estimates. Then

adaptive updates are performed recursively until the optimal solution is found from a well-designed beambook. Compared with existing beambook based beamforming algorithms

the proposed solution is more efficient in two aspects: low implementation complexity since neither the multiple beam patterns nor the exact channel state information is required; and high computational effectiveness due to the selective resource allocation mechanism. Simulation results show that a solution close to the global solution is achieved in a relatively small number of iterations

and the inevitable blockage impact in 60 GHz radio link is mitigated

which enhances the link robustness against obstructions.

关键词

Keywords

references

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MALTSEY A, PERAHIA E, HANSEN C, et al. Channel models for 60 GHz WLAN systems [EB/OL]. [2010-05-20]. https:∥mentor.ieee.org/802.11/dcn/09/11-09-0334-08-00ad-channel-models-for-60-ghz-wlan-systems.doc.

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