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首页> 外文会议>EUSIPCO 2007;European signal processing conference >A CORDIC-BASED QR-RLS MULTICHANNEL LATTICE FILTER
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A CORDIC-BASED QR-RLS MULTICHANNEL LATTICE FILTER

机译：基于CORDIC的QR-RLS多通道格子滤波器

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摘要

This paper presents an array-based algorithm for multichannelrn(multiple-input, single-output) lattice filtering. The filterrnis formed by an array of units that are adapted locallyrnand in parallel using a set of recursions that closely matchrnthose for single-channel lattice filters. The design, based onrna known step-by-step modular decomposition approach, allowsrnfor unequal filter lengths to be specified for differentrninput channels. Individual units are updated using a squarerootrn(QR) recursive-least squares (RLS) algorithm in arrayrnform that exhibits highly favorable numerical behavior. Thisrntype of filter may be mapped onto hardware by resorting tornthe CORDIC algorithm to implement Givens rotations. A procedurernbased on three CORDIC steps is proposed to handlerncomplex data that arise in several applications of multichannelrnfiltering. The algorithm is compared by simulationrnwith plain RLS and another multichannel RLS lattice algorithmrnover randomly-generated channels, and shown to significantlyrnoutperform them under low-precision fixed-pointrnarithmetic
机译：本文提出了一种基于数组的多通道（多输入，单输出）点阵滤波算法。过滤器由一系列单元组成，这些单元通过使用一组与单通道点阵滤镜紧密匹配的递归进行局部和并行调整。该设计基于已知的逐步模块分解方法，允许为不同的输入通道指定不相等的滤波器长度。使用平方根（QR）递归最小二乘（RLS）算法以数组形式更新单个单位，该算法具有很高的数值性能。可以通过诉诸CORDIC算法来实现Givens旋转将这种类型的滤波器映射到硬件上。提出了一种基于三个CORDIC步骤的程序来处理在多通道过滤的几种应用中出现的复杂数据。仿真结果与普通RLS和另一种多通道RLS晶格算法在随机生成的通道上进行比较，结果表明，在低精度定点算法下，该算法的性能明显优于常规RLS

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  • 来源
  • 会议地点 Poznan(PL);Poznan(PL)
  • 作者

    Jo?o Gomes; Victor Barroso;

  • 作者单位

    Instituto Superior Técnico – Instituto de Sistemas e RobóticarnAv. Rovisco Pais, 1049–001 Lisboa, Portugal jpg@isr.ist.utl.pt;

    rnInstituto Superior Técnico – Instituto de Sistemas e RobóticarnAv. Rovisco Pais, 1049–001 Lisboa, Portugal vab@isr.ist.utl.pt;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 通信理论;
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