Method and apparatus for cell searching in asynchronous CDMA systems
AssigneeTexas Instuments Incorporated
InventorsChaitali Sengupta, Yuan Kang Lee
Life of this patent
Estimating the term…
Abstract
A method for performing a cell search routine commences by using the Synchronization Channel's (SCH) Primary Synchronization Code (PSC) to acquire slot synchronization to a cell (402). This step will collect a number of hypotheses for frame timing. The method then uses a searcher algorithm such as a sequential dwell searcher that can quickly reject all of the wrong hypotheses gathered in the slot synchronization step, and determine the best hypotheses (404). This cell search routine leads to faster cell acquisition times as compared to some prior art techniques. A receiver (502) that includes a cell searcher (504) that performs the method mentioned above is also described.
Claims7
A method for cell searching in an asynchronous CDMA system where the scrambling code is known, comprising the steps of:
- (a) performing slot synchronization in order to collect a group of hypotheses for frame timing;
- and
- (b) processing through the group of hypotheses in step (a) in order to establish frame timing.
A communication receiver, comprising:
- an antenna;
- and
- a cell searcher coupled to the antenna, the cell searcher performing slot synchronization in order to collect a group of hypotheses for frame timing and processing through the group of hypotheses in step in order to establish frame timing.
Dependencies are inferred from the claim text.