Multipath components are delayed copies of the original transmitted wave traveling through a different echo path, each with a different magnitude and time-of-arrival at the receiver.
[1][2][3] A rake receiver utilizes multiple correlators to separately detect the M strongest multipath components.
The rake receiver was patented in the US by Robert Price and Paul E. Green in July 1956,[4] (U.S. Pat.
Rake receivers are common in a wide variety of CDMA and W-CDMA radio devices such as mobile phones and wireless LAN equipment.
In a Flexible rake Receiver, signal reception is performed with a single correlator engine and a stream buffer storing the entire delay spread of baseband input/output (I/O) samples.