Method and system for single antenna receiver system for WCDMA
View Patent ↗A receiver receives multipath signals in a W-CDMA system. Channel estimates and timing reference signals are generated utilizing the received multipath signals. Timing correction signals indicating a location of the received multipath signals may be generated and the received multipath signals may be combined based on the computed channel estimates and/or the generated timing reference signals. The multipath signals may be combined as a signal cluster. Circuitry may be provided that computes channel estimates based on at least one of a plurality of received multipath signals, and generates timing reference signals indicating a location of at least one of the plurality of received multipath signals. Circuitry may also be provided that combines at least a portion of the plurality of received multipath signals based on at least a portion of the computed channel estimates and/or the generated timing reference signals.
1. A method for processing radio frequency (RF) signals, the method comprising:
computing channel estimates based on a plurality of chip-level data items received via a plurality of received multipath signals;
generating timing reference signals indicating a location of at least one of said plurality of received multipath signals;
maximum-ratio combining at least a portion of said plurality of received chip-level data items as a signal cluster to form a combined plurality of chip-level data items based on at least one of said computed channel estimates and said generated timing reference signals, wherein the maximum-ratio combining includes assigning a rake receiver finger to the signal cluster; and
extracting transmitted information from said combined plurality of chip-level data items.
2. The method according to claim 1 , wherein said extracting transmitted information further includes generating a plurality of symbol-level data items by despreading said combined plurality of chip-level data items.
3. The method according to claim 1 , wherein said extracting transmitted information further includes generating a plurality of symbol-level data items by utilizing a despreading code.
4. The method according to claim 3 , further comprising:
combining at least a portion of said plurality of symbol-level data items.
5. The method according to claim 3 , further comprising:
combining at least a portion of said plurality of symbol-level data items when said plurality of received multipath signals are received from a plurality of base transceiver stations.
6. The method according to claim 1 , wherein each of said plurality of received multipath signals is received at a distinct time instant, the method further comprising:
determining each said distinct time instant based on said generated timing reference signals.
7. The method according to claim 1 , wherein said maximum-ratio combining at least a portion of said plurality of received chip-level data items as the signal cluster is further based on a time interval.
8. The method according to claim 7 , wherein the time interval is determined using a time offset.
9. The method according to claim 1 , further comprising:
generating a lock indication to designate a validity of a component value in said computed channel estimates.
10. The method according to claim 1 , wherein said maximum-ratio combining at least a portion of said plurality of received chip-level data items as the signal cluster is further based on a time interval having a length sufficient to permit receipt of said plurality of received multipath signals prior to a transmission of a subsequent signal.
11. A system for processing radio frequency (RF) signals, comprising:
a circuit comprising at least one cluster path processor and a maximum-ratio combining processor, wherein said maximum-ratio combining processor includes a rake receiver, said circuit being configured to:
compute channel estimates based on a plurality of chip-level data items received via a plurality of received multipath signals;
generate timing reference signals indicating a location of said at least one of said plurality of received multipath signals;
maximum-ratio combine at least a portion of said plurality of received chip-level data items as a signal cluster to form a combined plurality of chip-level data items based on at least one of said computed channel estimates and said generated timing reference signals, wherein the circuit is further configured to assign a finger of the rake receiver to the signal cluster; and
extract transmitted information from said combined plurality of chip-level data items.
12. The system according to claim 11 , wherein said circuit is further configured to extract the transmitted information by generating a plurality of symbol-level data items by despreading said combined plurality of chip-level data items.
13. The system according to claim 11 , wherein said circuit is further configured to extract the transmitted information by generating a plurality of symbol-level data items by utilizing a despreading code.
14. The system according to claim 13 , wherein said circuit is further configured to combine at least a portion of said plurality of symbol-level data items.
15. The system according to claim 13 , wherein said circuit is further configured to combine at least a portion of said plurality of symbol-level data items when said plurality of received multipath signals are received from a plurality of base transceiver stations.
16. The system according to claim 11 , wherein each of said plurality of received multipath signals is received at a distinct time instant, and said circuit is further configured to determine each said distinct time instant based on said generated timing reference signals.
17. The system according to claim 11 , wherein said circuit is further configured to combine said at least a portion of said plurality of received chip-level data items as the signal cluster is further based on a time interval.
18. The system according to claim 17 , wherein the time interval is determined using a time offset.
19. The system according to claim 11 , wherein said circuit is further configured to generate a lock indication to designate a validity of a component value in said computed channel estimates.
20. The system according to claim 11 , wherein said circuit is further configured to combine said at least a portion of said plurality of received chip-level data items as the signal cluster is further based on a time interval having a length sufficient to permit receipt of said plurality of received multipath signals prior to a transmission of a subsequent signal.