发明名称 |
Digital radio frequency memory utilizing time interleaved analog to digital converters and time interleaved digital to analog converters |
摘要 |
A digital radio frequency memory (DRFM) comprises a plurality of time interleaved analog to digital converters (ADCs) in cooperation with a plurality of time interleaved digital to analog converters (DACs) to provide an effective sampling rate which may be greater than the clock rate of the system. A higher sampling rate at the ADC increases instantaneous bandwidth, while a higher sampling rate at the DAC improves spectral purity. The ADCs and DACs are time interleaved by supplying a clock signal to each ADC/DAC which is skewed with respect to the previous and subsequent skewed signal. In order to process the higher effective sampling rate, a pre-computation of DAC values for each high rate sample is performed by an SDAC algorithm that pipelines the calculations of the processed sample values provided to the DAC. A DAC bias correction is provided to adjust for drift in the DACs. |
申请公布号 |
US8659453(B1) |
申请公布日期 |
2014.02.25 |
申请号 |
US201113082167 |
申请日期 |
2011.04.07 |
申请人 |
LOW NATHAN E.;WALTERS SHAWN;LOCKHEED MARTIN CORPORATION |
发明人 |
LOW NATHAN E.;WALTERS SHAWN |
分类号 |
H03M1/00 |
主分类号 |
H03M1/00 |
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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