NOVEL RECEIVER ARCHITECTURE FOR CDMA RECEIVER DOWNLINK

• US 20060209761A1
• Filed: 06/06/2006
• Published: 09/21/2006
• Est. Priority Date: 01/25/2002
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: DSPC Technologies Limited
• Inventors: Yellin, Daniel, Moshavi, Shimon, Hagin-Metzer, Tsofnat, Perets, Yoni
• Granted Patent: US 8,724,597 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7085 using a code tracking loop, e.g. a delay-locked loop
• CPC Class Codes: H04B 1/7117 Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04B 2201/70702 Intercell-related aspects
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04

Abstract

A receiver includes a searcher to identify pilot signals within a received signal and a pilot tracking unit to continuously track pilot signals identified by the searcher. The pilot signals tracked by the pilot tracking unit may include pilot signals associated with an affiliated base station as well as pilot signals associated with non-affiliated base stations. In at least one embodiment, the pilot tracking unit continuously tracks most or all of the pilot signals identified by the searcher.

Claims

1. A wireless communication system comprising:

a network controller to make a soft handoff decision for a communication device based on base station related information received from the communication device, said base station related information being assembled within the communication device by continuously tracking selected base station pilot signals received by the communication device, said selected base station pilot signals sometimes including one or more pilot signals that are not assigned to rake fingers within said communication device, said network controller to deliver soft handoff information to said communication device after said soft handoff decision has been made.

2. The wireless communication system of claim 1, wherein:

said base station related information includes detailed signal strength reports for base stations about the communication device.

3. The wireless communication system of claim 1, wherein:

said base station related information includes multi-path diversity information for base stations about the communication device.

4. The wireless communication system of claim 1, wherein:

said base station related information includes antenna diversity information for base stations about the communication device.

5. The wireless communication system of claim 1, wherein:

said base station related information includes signal strength reports for base stations about the communication device that have been modified based on at least one of the following;

multi-path diversity information for base stations about the communication device and antenna diversity information for base stations about the communication device.

6. The wireless communication system of claim 1, wherein:

said soft handoff information includes information identifying members of an active set of base stations for the communication device.