Channel simulator having function of supporting carrier aggregation and carrier aggregation block used for the same
Provided is a channel simulator having a function of supporting a carrier aggregation and a carrier aggregation block used for the same to support a carrier aggregation function at a minimum path loss without reducing the number of valid connectable terminals. The channel simulator includes: a terminal interface block connected to each of at least four terminals through at least two transmission/reception ports; a carrier aggregation block including unit modules each including one RF coupler and one RF switch, and interposed between the terminal interface block and the terminal to support the carrier aggregation for one to four component carriers; and a management server. The carrier aggregation block includes a front-end carrier aggregation unit and a rear-end carrier aggregation unit.
1. A channel simulator for supporting a carrier aggregation, the channel simulator comprising:
a terminal interface block connected to a plurality of terminals through a plurality of transmission/reception ports;
a carrier aggregation block including a plurality of circuits each having a RF coupler and a RF switch, and interposed between the terminal interface block and the terminals to support the carrier aggregation for at least one component carrier; and
a management server for controlling On/Off of the RF switch according to a carrier aggregation scenario preset by a user,
wherein the carrier aggregation block comprises,
a front-end carrier aggregation sub-block including a plurality of combining circuits in which two of the combining circuits operate together while being connected to two transmission/reception ports for two arbitrary terminals so as to determine an aggregation with respect to every two component carriers; and
a rear-end carrier aggregation sub-block including a plurality of combining circuits for determining a re-aggregation of the component carriers aggregated in the front-end carrier aggregation sub-block, and a plurality of dividing circuits for copying the component carriers aggregated by the combining circuits to supply the copied component carriers to a terminal where a signal is disconnected.
2. The channel simulator of claim 1 , wherein the rear-end carrier aggregation sub-block copies and supplies four component carriers to other terminals.
3. The channel simulator of claim 2 , wherein the rear-end carrier aggregation sub-block copies and supplies every two component carriers to two mutually different terminals, respectively.
4. The channel simulator of claim 2 , wherein the dividing circuit of the rear-end carrier aggregation sub-block comprises a 1:4 divider having a single input terminal and four output terminals, and the rear-end carrier aggregation sub-block further comprises two switches for distributing signals of the 1:4 divider to arbitrary terminals.