发明名称 |
Digital intermediate frequency QAM modulator using parallel processing |
摘要 |
The digital Intermediate Frequency (IF) modulator applies to various modulation types and offers a simple and low cost method to implement a high-speed digital IF modulator using field programmable gate arrays (FPGAs). The architecture eliminates multipliers and sequential processing by storing the pre-computed modulated cosine and sine carriers in ROM look-up-tables (LUTs). The high-speed input data stream is parallel processed using the corresponding LUTs, which reduces the main processing speed, allowing the use of low cost FPGAs.
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申请公布号 |
US7379509(B2) |
申请公布日期 |
2008.05.27 |
申请号 |
US20030644561 |
申请日期 |
2003.08.19 |
申请人 |
LAWRENCE LIVERMORE NATIONAL SECURITY, LLC |
发明人 |
PAO HSUEH-YUAN;TRAN BINH-NIEN |
分类号 |
H04L27/36;H03C3/40 |
主分类号 |
H04L27/36 |
代理机构 |
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