Method and system for generating a complex pseudonoise sequence for ...

1. A method in a wireless communication system for generating a complex pseudonoise (PN) sequence for processing a code division multiple access signal, the method comprising the steps of:

selecting a chip time in a complex PN sequence generator; and

at each selected chip time, restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle.

2. The method for generating a complex pseudonoise sequence according to claim 1 wherein the step of selecting a chip time in a complex PN sequence generator further includes periodically selecting every Nth chip time in a complex PN sequence generator.

3. The method for generating a complex pseudonoise sequence according to claim 2 wherein N equals 2 for selecting every other chip time in the complex PN sequence generator.

4. The method for generating a complex pseudonoise sequence according to claim 1 wherein the step of restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle further includes restricting a phase difference between a previous complex PN chip and a next complex PN chip to 90.degree..

5. The method for generating a complex pseudonoise sequence according to claim 1 wherein the step of restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle further includes adding 90.degree. or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip.

6. The method for generating a complex pseudonoise sequence according to claim 5 wherein the step of adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip further includes adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip in response to a value of a previous complex chip to produce a next complex PN chip.

7. The method for generating a complex pseudonoise sequence according to claim 5 wherein the step of adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip further includes adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip according to a preselected sequence to produce a next complex PN chip.

8. The method for generating a complex pseudonoise sequence according to claim 1 wherein the step of periodically selecting a chip time in a complex PN sequence generator further includes periodically selecting N chip times within a series of M consecutive chip times in a complex PN sequence generator.

9. A system in a wireless communication system for generating a complex pseudonoise (PN) sequence for processing a code division multiple access signal, the system comprising:

means for selecting a chip time in a complex PN sequence generator; and

means for restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle at each selected chip time.

10. The system for generating a complex pseudonoise sequence according to claim 9 wherein the means for selecting a chip time in a complex PN sequence generator further includes means for periodically selecting every Nth chip time in a complex PN sequence generator.

11. The system for generating a complex pseudonoise sequence according to claim 10 wherein N equals 2 for selecting every other chip time in the complex PN sequence generator.

12. The system for generating a complex pseudonoise sequence according to claim 9 wherein the means for restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle further includes means for restricting a phase difference between a previous complex PN chip and a next complex PN chip to 90.degree..

13. The system for generating a complex pseudonoise sequence according to claim 9 wherein the means for restricting a phase difference between a previous complex PN chip and a next complex PN chip to a preselected phase angle further includes means for adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip.

14. The system for generating a complex pseudonoise sequence according to claim 13 wherein the means for adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip further includes means for adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip in response to a value of a previous complex chip to produce a next complex PN chip.

15. The system for generating a complex pseudonoise sequence according to claim 13 wherein the means for adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip to produce a next complex PN chip further includes means for adding 90.degree. to or subtracting 90.degree. from a phase of a previous complex PN chip according to a preselected sequence to produce a next complex PN chip.

16. The system for generating a complex pseudonoise sequence according to claim 9 wherein the means for periodically selecting a chip time in a complex PN sequence generator further includes means for periodically selecting N chip times within a series of M consecutive chip times in a complex PN sequence generator.