发明名称 |
System and method for improved spur reduction in direct RF receiver architectures |
摘要 |
Improved spur reduction architectures that improve linearity in direct radio frequency (RF) receiver architectures. Non-uniform sampling in the form of sampling clock phase (or frequency) modulation is used to induce phase (or frequency) modulation on signals that are being received from a given Nyquist zone. At the output of the ADC (analog-to-digital converter), the signals are de-modulated to remove the induced modulation based on the Nyquist zone that is being received. The de-modulation process results in non-desired spurious artifacts (interfering leakage signals and ADC spurs) being spread in the frequency domain. Strong spurious artifacts may be removed after measuring the induced modulation and de-modulating. For the case of weak spurious artifacts, the de-modulation for the desired Nyquist zone spread these signals in the frequency domain. Induced modulation on signals may also provide a dithering effect on the ADC.
|
申请公布号 |
US2010202566(A1) |
申请公布日期 |
2010.08.12 |
申请号 |
US20090592777 |
申请日期 |
2009.12.02 |
申请人 |
FUDGE GERALD L;BLAND ROSS E;RAVINDRAN SUJIT;CHIVERS MARK A |
发明人 |
FUDGE GERALD L.;BLAND ROSS E.;RAVINDRAN SUJIT;CHIVERS MARK A. |
分类号 |
H04L27/14;H04L27/00 |
主分类号 |
H04L27/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|