Optimum interpolator method and apparatus for digital timing adjustment
First Claim
1. A digital timing synchronizer of a receiver for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code, comprising:
- a channel estimator configured for estimating an initial code phase of the received signal;
a code generator configured to generate a timing reference code that is adjustable by integer increments; and
an interpolation feedback circuit configured for interpolation and correction of the timing error, whereby the interpolation is achieved through an integer code shift, plus a quantized fractional delay estimate selected from a look-up table of quantized fractional delay estimate values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.
1 Assignment
0 Petitions
Accused Products
Abstract
A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code. A channel estimator estimates an initial code phase of the received signal. A code generator generates a timing reference code that is adjustable by integer increments. An interpolation feedback circuit is configured for interpolation and correction of the timing error, whereby the interpolation is achieved through an integer code shift, plus a quantized fractional adjustment selected from a look-up table of quantized fractional adjustment values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.
27 Citations
16 Claims
-
1. A digital timing synchronizer of a receiver for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code, comprising:
-
a channel estimator configured for estimating an initial code phase of the received signal;
a code generator configured to generate a timing reference code that is adjustable by integer increments; and
an interpolation feedback circuit configured for interpolation and correction of the timing error, whereby the interpolation is achieved through an integer code shift, plus a quantized fractional delay estimate selected from a look-up table of quantized fractional delay estimate values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for digital timing synchronization of a receiver to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code, comprising:
-
estimating an initial code phase of the received signal;
generating a timing reference code that is adjustable by integer increments; and
interpolating and correcting the timing error, whereby the interpolating is achieved through an integer code shift, plus a quantized fractional delay selected from a look-up table of quantized fractional delay values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification