Original document(23 pages) Authorized document(22 pages) 中文版
    A cable modem (20) including a demodulator (25) having an improved carrier recovery circuit (35) is disclosed. The cable modem (20) demodulates phase-modulated signals, including phase and amplitude modulated signals such as quadrature amplitude modulation (QAM) information. The carrier recovery circuit (35) includes a phase detection function (40), preferably realized by way of programs executed by a digital signal processor, that generates a derivative signal (g(x'')) based upon a summation of a complex function of a corrected input signal (x'') over some or all of the possible points in the modulation constellation.
Application Number
99120729 Application Date
Title 名称 Improved phase estimation for use in reinsertion of phase-modulated signal carrier such as quadrature-amplitude modulated signal carrier
Publication Number
1265547 Publication Date
Approval Pub. Date 2004.03.31 Granted Pub. Date 2004.03.31
International Classification 分类号 H04L27/34
Applicant(s) Name
Texas Instruments Inc.
Address 地址
Inventor(s) Name 发明人 A. Gatheler
Attorney & Agent 代理人 sun jingguo

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