发明名称 |
SIGNAL MODULATION FOR SWITCHED MODE POWER AMPLIFIERS TECHNICAL FIELD OF THE INVENTION |
摘要 |
<p>In a device (10) for modulating Cartesian base band signals (I, Q) a first and second mapping unit (12, 14) each map signal samples of a corresponding Cartesian signal (I, Q) to intermediary signal sections having only two non-zero levels provided symmetrically around zero for forming two intermediary signals (S1, S2). A first and second processing unit (16, 18) each map each intermediary sections of an intermediary signal (S1, S2) to segments of a corresponding pulse train (S3, S4) through providing a positive pulse in one half of a segment if the corresponding signal section has a positive signal level and a positive pulse in another half of the segment if the corresponding signal section has a negative signal level. A delay unit (20) delays the pulses of one train in relation to the other and a combining unit (22) combines the trains for provision to a power amplifier (24).</p> |
申请公布号 |
WO2009031952(A1) |
申请公布日期 |
2009.03.12 |
申请号 |
WO2007SE50613 |
申请日期 |
2007.09.04 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);MALMQVIST, HAAKAN;REXBERG, LEONARD |
发明人 |
MALMQVIST, HAAKAN;REXBERG, LEONARD |
分类号 |
H04L27/36;H03F3/217;H04L25/49 |
主分类号 |
H04L27/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|