A Digital Phase Locked Loop based Signal and Symbol Recovery System for Wireless Channel (Signals and Communication Technology)
暫譯: 基於數位相位鎖定迴路的無線通道信號與符號恢復系統(信號與通信技術)

Basab Bijoy Purkayastha, Kandarpa Kumar Sarma

  • 出版商: Springer
  • 出版日期: 2015-02-17
  • 售價: $4,510
  • 貴賓價: 9.5$4,285
  • 語言: 英文
  • 頁數: 244
  • 裝訂: Hardcover
  • ISBN: 8132220404
  • ISBN-13: 9788132220404
  • 海外代購書籍(需單獨結帳)

商品描述

The book reports two approaches of implementation of the essential components of a Digital Phase Locked Loop based system for dealing with wireless channels showing Nakagami-m fading. It is mostly observed in mobile communication. In the first approach, the structure of a Digital phase locked loop (DPLL) based on Zero Crossing (ZC) algorithm is proposed. In a modified form, the structure of a DPLL based systems for dealing with Nakagami-m fading based on Least Square Polynomial Fitting Filter is proposed, which operates at moderate sampling frequencies. A sixth order Least Square Polynomial Fitting (LSPF) block and Roots Approximator (RA) for better phase-frequency detection has been implemented as a replacement of Phase Frequency Detector (PFD) and Loop Filter (LF) of a traditional DPLL, which has helped to attain optimum performance of DPLL. The results of simulation of the proposed DPLL with Nakagami-m fading and QPSK modulation is discussed in detail which shows that the proposed method provides better performance than existing systems of similar type.

商品描述(中文翻譯)

本書報告了兩種實現數位相位鎖定迴路(Digital Phase Locked Loop, DPLL)系統的基本組件的方法,以應對顯示 Nakagami-m 衰落的無線通道。這種情況在行動通信中最為常見。在第一種方法中,提出了一種基於零交叉(Zero Crossing, ZC)演算法的數位相位鎖定迴路(DPLL)結構。在修改後的形式中,提出了一種基於最小平方多項式擬合濾波器(Least Square Polynomial Fitting Filter, LSPF)的 DPLL 系統結構,以應對 Nakagami-m 衰落,該系統在中等取樣頻率下運作。實現了一個六階最小平方多項式擬合(LSPF)區塊和根逼近器(Roots Approximator, RA),以取代傳統 DPLL 的相位頻率檢測器(Phase Frequency Detector, PFD)和迴路濾波器(Loop Filter, LF),這有助於達到 DPLL 的最佳性能。詳細討論了所提出的 DPLL 在 Nakagami-m 衰落和 QPSK 調變下的模擬結果,顯示所提出的方法提供了比現有類似系統更好的性能。