| 摘要 |
<p>A beam forming receiver comprises a plurality of front end circuits (4, 5, 6, 7, 8) receiving RF signals from array antennas (2, 22) and down-converting them to analog baseband signals. A receiving section comprises a first beam former (11, 12, 13) that controls phase and amplitude of each analog baseband signal individually to obtain analog phase shifted signals and combines them to a combined analog baseband signal. A beam tracking section comprises analog-to-digital converters (35, 36) to convert the analog baseband signals to digital baseband signals, and a second beam former. The second beam former phase shifts and combines the digital baseband signals to a combined digital baseband signal; and the searching and tracking section can further determine from this signal a signal indicative of a beam direction and provide it as a control signal to the first beam former.</p> |
