Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system

LIU Liang; ZHOU Jun; YE Fan; REN Jun-yan

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Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system

更新时间：2024-10-14

- Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system
- Vol. 30, Issue 10, Pages: 1-7(2009)
- 作者机构：
  
  复旦大学专用集成电路与系统国家重点实验室微纳电子科技创新平台
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN925
- Published：2009
- 稿件说明：
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LIU Liang, ZHOU Jun, YE Fan, et al. Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system[J]. 2009, 30(10): 1-7.
DOI：

LIU Liang, ZHOU Jun, YE Fan, et al. Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system[J]. 2009, 30(10): 1-7. DOI：

摘要

解决模拟前端非理想因素:载波频率偏差、采样频率偏差以及I/Q失配对多带-正交频分复用超宽带系统的影响。提出时域载波频偏和I/Q失配估计和补偿方案。该方案包括一种能有效对抗大范围I/Q失配的数据辅助载波频偏估计算法

一种时域I/Q失配估计算法和一种2步式载波频偏、I/Q失配补偿算法。在频域

利用超宽带数据帧头的时域扩展特性进行残余载波频偏和采样频偏估计。仿真结果表明

即使存在较大非理想因素的情况下

提出的估计与补偿方案仍然能提供较好的系统误码性能。

Abstract

Three types of wireless system frontend imperfections

namely carrier frequency offset （CFO）

sampling frequency offset （SFO） and in-phase/quadrature-phase （I/Q） imbalance were addressed. A time-domain CFO and I/Q imbalance estimation and compensation scheme for MB-OFDM based ultra-wideband （UWB） system was proposed. In the scheme

a data-aided CFO estimation algorithm

which was robust to large I/Q imbalance

was presented. Also

a time-domain I/Q imbalance estimation algorithm was introduced. Finally a two-step joint CFO and I/Q imbalance compensation scheme was developed. In frequency domain

a residual CFO and SFO estimation algorithm using the time-domain spreading feature of the UWB frame header was presented. The proposed scheme is competent for large front-end imperfections

and the results are confirmed by simulations.

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