Adaptive timing recovery via generalized RAKE reception
First Claim
1. A method of determining operating modes in a receiver for demodulating a received signal, comprising:
- identifying a signal image in the received signal;
determining a first signal quality metric for a single-delay receiver mode in which the signal image is processed using a single delay;
determining a second signal quality metric for a multi-delay receiver mode in which the signal image is processed using multiple delays; and
selecting the single-delay receiver mode or the multi-delay receiver mode based on a comparison of said first and second signal quality metrics.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for determining operating modes in a receiver is described herein. A delay searcher in the receiver detects a signal image in the received signal. When the receiver is a RAKE receiver, a plurality of RAKE fingers coherently combine time-shifted versions of the received signal at different delays. Alternatively, when the receiver is a chip equalization receiver, an FIR filter coherently pre-combines the signal images in the received signal. A processor determines delays. In particular, the processor generates a first signal quality metric for a single-delay receiver mode, and generates a second signal quality metric for a multi-delay receiver mode. Based on a comparison of the first and second signal quality metrics, the processor selects the single-delay or the multi-delay receiver mode for processing the signal image.
87 Citations
48 Claims
-
1. A method of determining operating modes in a receiver for demodulating a received signal, comprising:
-
identifying a signal image in the received signal;
determining a first signal quality metric for a single-delay receiver mode in which the signal image is processed using a single delay;
determining a second signal quality metric for a multi-delay receiver mode in which the signal image is processed using multiple delays; and
selecting the single-delay receiver mode or the multi-delay receiver mode based on a comparison of said first and second signal quality metrics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. A receiver for demodulating a received signal containing one or more signal images, said receiver comprising:
-
a delay searcher configured to detect a signal image in the received signal;
a processor operative to;
determine a first signal quality metric for a single-delay receiver mode in which the signal image is processed using a single delay;
determine a second signal quality metric for a multi-delay receiver mode in which the signal image is processed using multiple delays; and
select the single-delay receiver mode or the multi-delay receiver mode based on a comparison of said first and second signal quality metrics. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
-
Specification