发明名称 |
Transmitter linearized using cartesian-processed look-up table and method therefor |
摘要 |
A transmitter (50) includes a nonlinear predistorter (58) having two instances of an inverting transform (106, 106′) that may be implemented in a look-up table (122) and that implements a transform which is the inverse of an average terms component (96) of a nonlinear transform model (94) for an amplifier (70). The look-up table (122) may be updated using a continuous process control loop that avoids Cartesian to polar coordinate conversions. One of the two instances of the inverting transform (106) is cascaded with a non-inversing transform (108) within a residual cancellation section (110) of the predistorter (58). The non-inversing transform (108) implements a transform which is an estimate of a deviation terms component (98) of the nonlinear transform model (94). The residual cancellation section (110) produces a weak signal that replaces an unwanted residual term in an amplified communication signal (76) with a much weaker residual term.
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申请公布号 |
US8351876(B2) |
申请公布日期 |
2013.01.08 |
申请号 |
US20100860507 |
申请日期 |
2010.08.20 |
申请人 |
CRESTCOM, INC.;MCCALLISTER RONALD DUANE;BROMBAUGH ERIC M. |
发明人 |
MCCALLISTER RONALD DUANE;BROMBAUGH ERIC M. |
分类号 |
H04B1/04;H04K3/00 |
主分类号 |
H04B1/04 |
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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