发明名称 |
DEVICE AND METHOD FOR CONTROLLING DISTORTION CHARACTERISTIC OF PREDISTORTION UNIT |
摘要 |
controlling nonlinear distortion characteristics in radio communication system transmitter. SUBSTANCE: device has predistortion unit 1 for pre- shaping nonlinear distortion characteristic opposing those occurring in output amplifier 22; step-up converter 20 that functions to convert output frequency of predistortion unit into radio-frequency band and to send converted frequency to output amplifier 22; check-up unit 44 for checking output level across output amplifier 22; memory unit 42 for pre- memorizing nonlinear distortion characteristics of predistortion unit 1 in the form of digital data; distortion controller 46 for output and control of digital data on definite nonlinear distortion characteristic stored in memory unit 42 according to output level across check-up unit 44; digital-to-analog converter 40 for converting digital data on nonlinear distortion characteristic arriving from distortion controller 46 into analog signal and applying converted data to predistortion unit 1. EFFECT: enhanced accuracy of correlating distortion characteristics of predistortion unit and output amplifier. 5 cl, 4 dwg
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申请公布号 |
RU2178236(C2) |
申请公布日期 |
2002.01.10 |
申请号 |
RU19970105376 |
申请日期 |
1997.03.31 |
申请人 |
SAMSUNG EHLEKTRONIKS KO., LTD. |
发明人 |
LI DONG-VU |
分类号 |
H03F1/26;(IPC1-7):H03F1/26 |
主分类号 |
H03F1/26 |
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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