초록 ▼

A spread spectrum signal having an associated code is tracked at a receiver. A plurality of components of the spread spectrum signal are despread using the associated code. Each of the plurality of components has a different code phase than all others of the plurality of code phases. Each of the plu

A spread spectrum signal having an associated code is tracked at a receiver. A plurality of components of the spread spectrum signal are despread using the associated code. Each of the plurality of components has a different code phase than all others of the plurality of code phases. Each of the plurality of components is weighted based on a phase difference between that component and a center code phase associated with the plurality of components. A tracking error is determined based on the weighted components.

대표청구항 ▼

What is claimed is: 1. A method implemented in a communication device for tracking a spread spectrum signal having an associated code at a receiver, the method comprising: despreading by a despreading device a plurality of components of the spread spectrum signal using the associated code, each of

What is claimed is: 1. A method implemented in a communication device for tracking a spread spectrum signal having an associated code at a receiver, the method comprising: despreading by a despreading device a plurality of components of the spread spectrum signal using the associated code, each of the plurality of components having a different code phase than all others of the plurality of code phases; weighting each of the plurality of components with a weight value based on a phase difference between that component and a center code phase of the plurality of components; and determining a tracking error based on the weighted components. 2. The method of claim 1 further comprising adjusting a phase of the center code phase in response to the tracking error. 3. The method of claim 1 wherein the weight values are proportional to a phase difference of each of the plurality of components and the center code phase. 4. The method of claim 1 wherein the weight values are proportional to a square of a phase difference of each of the plurality of components and the center code phase. 5. A circuit for tracking a spread spectrum signal having an associated code, the circuit comprising: an input configured to receive a received signal; a despread device configured to despread the received signal to produce a plurality of components of the spread spectrum signal using the associated code, each of the plurality of components having a different code phase than all others of the plurality of components; and a weight device configured to weigh each of the plurality of components with a weight value based on a phase difference between that component and a center code phase of the plurality of components, and to determine a tracking error based on the weighted components. 6. The circuit of claim 5 wherein a phase of the center code phase is adjusted in response to the tracking error. 7. The circuit of claim 5 wherein the weight device weighs proportional to a phase difference of each of the plurality of components and the center code phase. 8. The circuit of claim 5 wherein the weight device weighs proportional to a square of a phase difference of each of the plurality of components and the center code phase. 9. A circuit for tracking a spread spectrum signal having an associated code, the circuit comprising: an input configured to receive a received signal; a plurality of adaptive matched filters configured to despread the received signal to produce a plurality of components of the spread spectrum signal using the associated code, each of the plurality of components having a different code phase than all others of the plurality of components; a weighting bank configured to weigh each of the plurality of components with a weight value based on a phase difference between that component and a center code phase of the plurality of components; and an adder configured to add the weighted components to determine a tracking error. 10. The circuit of claim 9 wherein a phase of the center code phase is adjusted in response to the tracking error. 11. The circuit of claim 9 wherein the weight values are proportional to a phase difference of each of the plurality of components and the center code phase. 12. The circuit of claim 9 wherein the weight values are proportional to a square of a phase difference of each of the plurality of components and the center code phase.