发明名称 |
Digital baseband modulator |
摘要 |
<p>A digital baseband modulator having a flexible architecture that is readily adaptible to a variety of digital modulation types is provided. A symbol builder maps the input data to a series of modulation states corresponding to data symbols that are represented as state indexes. A pair of digital filters accepts the state indexes being generated by the symbol builder to provide both up-sampling and filtering functions. The digital filters are implemented using random access memory (RAM) to implement blocks of interpolating look-up multipliers which may be readily configured between fast, normal, and long modes. The filtered output data from the digital filters is provided to a resampler that converts the filtered output data to an output sample rate that corresponds to the sample rate of output DACs and corresponding analog low pass filters. <IMAGE></p> |
申请公布号 |
EP0940956(A2) |
申请公布日期 |
1999.09.08 |
申请号 |
EP19990301614 |
申请日期 |
1999.03.03 |
申请人 |
AGILENT TECHNOLOGIES, INC. (A DELAWARE CORPORATION) |
发明人 |
SCHWARTZ, DAVID J.;BLOOM, ALAN R.;ANKLAM, WILLIAM J. |
分类号 |
H04L27/20;H04J13/00;H04L27/00;(IPC1-7):H04L27/00 |
主分类号 |
H04L27/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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