Channel estimator with extended channel bandwidth
AssigneeMotorola, Inc.
InventorsMichael Wang, Rajeev Agrawal, Xiangyang Chen, Ajoy Singh, Tyler Brown
Life of this patent
Estimating the term…
Abstract
A method (1700) and apparatus (1801) provide channel estimation with extended bandwidth filters. Antenna (1813) receives a signal such as a pilot signal and detects a bandwidth associated with the pilot signal in a detector (320). One of a plurality of filters (603, 605, 607, and 609) including extended bandwidth filters (311) and a default filter (305) can be selected by a selector (617). If the detector detects activity associated with a wider bandwidth, the filter associated with the wider bandwidth is selected over the presently selected filter. If no activity is detected, the default filter is selected.
Claims20
A method for providing an estimation of a channel in a receiver associated with one or more of a mobile station and a base station in a Radio Access Network (RAN), the receiver capable of moving relative to a source of a signal in accordance with a relative speed, the method comprising:
- detecting the signal within one of a plurality of frequency bandwidths associated with a corresponding plurality of filters to provide a detected one of the plurality of frequency bandwidths;
- and
- selecting one of the plurality of filters for providing the estimation based on the detected one of the plurality of frequency bandwidths,
- wherein if the detecting the signal fails to provide the detected one of the plurality of frequency bandwidths, the selecting selects a default one of the plurality of filters for the providing the estimation.
An apparatus for providing an estimation of a channel in a receiver associated with one or more of a mobile station and a base station in a Radio Access Network (RAN), the receiver capable of moving relative to a source of a signal in accordance with a relative speed, the apparatus comprising:
- a memory;
- an RF interface arranged to couple to the RAN and configured to receive the signal;
- and
- a processor coupled to the memory and the RF interface, the processor configured to facilitate:
- detecting the signal received from the RF interface within an associated frequency bandwidth to form a detected signal;
- and
- selecting one of a plurality of filters configured in the processor for providing the estimation based on the detected signal,
- wherein if the detecting fails to detect the signal within the associated frequency bandwidth, the selecting selects a default one of the plurality of filters for the providing the estimation.
A channel estimator configured for estimating a channel in a receiver associated with one or more of a mobile station and a base station in a Radio Access Network (RAN), the receiver capable of moving relative to a source of a signal in accordance with a relative speed, the channel estimator comprising:
- a default filter and an extended filter;
- a detector configured to receive the signal and detect channel activity associated with the signal to form a detected channel activity, the detected channel activity capable of being detected in connection with a bandwidth associated with one of the default filter and the extended filter;
- and
- a selector coupled to the default filter, the extended filter, and the detector, the selector configured to select one of the default filter and the extended filter based on the detected channel activity to provide the estimating the channel.
Dependencies are inferred from the claim text.