| 释义 |
rake receiver An antenna system that comprises a set of four receivers, or fingers, that work in a coor- dinated way to gather signal elements much like the tines of a garden rake work together to gather leaves. Each finger gathers a faded, or attenuated, signal element at a separate moment in time. The receiver employs spatial diversity and time diversity, combining and correlating the results of all four fingers to optimize the signal, thereby countering the effects of multipath fading and delay spread. Code-division multiple access (CDMA) systems employ rake receivers to deal with issues of multipath interference (MPI). See also antenna, attenuation, CDMA, delay spread, MPI, multipath fading, spatial diversity, and time diversity. |