发明名称 |
MOBILE WIRELESS COMMUNICATIONS DEVICE WITH SEPARATE IN-PHASE (I) AND QUADRATURE (Q) PHASE POWER AMPLIFICATION AND POWER AMPLIFIER PRE-DISTORTION AND IQ BALANCE COMPENSATION |
摘要 |
A communications device, in one aspect as a portable wireless communications device, includes an in-phase modulator and power amplifier that receives a baseband I signal and modulates and amplifies the I signal. A quadrature modulator and power amplifier receives a baseband Q signal and modulates and amplifies the Q signal. A power combiner sums and outputs the I and Q signals. An I demodulator circuit receives a signal fed back from the I power amplifier and demodulates the fed back signal to produce demodulated I signals. A Q demodulator circuit receives a signal fed back from the Q power amplifier and demodulates the fed back signal to produce demodulated Q signals. A processor compares the digital, baseband I and Q signals with a demodulated I and Q signals to compensate for amplitude, frequency and phase modulation errors.
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申请公布号 |
US2012263213(A1) |
申请公布日期 |
2012.10.18 |
申请号 |
US201213526430 |
申请日期 |
2012.06.18 |
申请人 |
ZHU LIZHONG;MANKARUSE GEORGE;CORRIGAN MICHAEL;JARMUSZEWSKI PERRY;KRAVETS OLEKSIY;NICKERSON KENT;SANGARY NAGULA;RESEARCH IN MOTION LIMITED |
发明人 |
ZHU LIZHONG;MANKARUSE GEORGE;CORRIGAN MICHAEL;JARMUSZEWSKI PERRY;KRAVETS OLEKSIY;NICKERSON KENT;SANGARY NAGULA |
分类号 |
H04B1/38 |
主分类号 |
H04B1/38 |
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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