Method to train a radio receiver

• US 6,621,877 B1
• Filed: 09/30/1999
• Issued: 09/16/2003
• Est. Priority Date: 01/30/1997
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Carmon, Rafael, Fogel, Eliezer, Arviv, Eli, Shahaf, Mark
• Primary Examiner(s): Liu, Shuwang
• Application Number:
  US09/355,158
• Time in Patent Office: 1,447 Days
• Field of Search: 375/316, 375/343, 375/364, 375/365, 370/321, 370/347, 370/337, 370/442
• US Class Current: 375/316
• CPC Class Codes: H04B 7/005 Control of transmission; Equalising

Abstract

A method to train a radio includes the steps of: in a radio (36), receiving a slot of information (2) containing at least an initial portion (4) containing training information (10), a second portion (5) containing training information (11), which second portion (5) is separated from the initial portion (4), and a concluding portion (6) containing training information (12), which concluding portion (6) is separated from the second portion (5). The method combining one of the initial portion (4) with the concluding portion (6a) of a previous slot of information (1) and the concluding portion (6) with an initial portion (4b) of a subsequent slot of information (3) to provide an at least one combined portion of training information. The method using the at least one combined portion of training information and the second portion of training information to train the radio.

Claims

1. A method comprising the steps of:

in a radio, receiving a first slot of information containing at least an initial portion containing training information, a second portion containing training information, which second portion is separated from the initial portion, and a concluding portion containing training information, which concluding portion is separated from the second portion;

combining at least one of;

the initial portion with the concluding portion of a previous slot of information; and

the concluding portion of the first slot of information with an initial portion of a subsequent slot of information;

to provide at least one combined portion of training information; and

using the at least one combined portion of training information and the second portion of training information to train the radio.

2. A method as claimed in claim 1, wherein the initial portion of the first slot of information includes a first predetermined number of symbols of training information, the second portion of the first slot of information includes a second predetermined number of symbols of training information, and the concluding portion of the first slot of information includes a third predetermined number of symbols of training information.

3. The method of claim 2 wherein the initial portion and the concluding portion contain a training information of a first type and the second portion contains information from a second and third type.

4. The method of claim 2 wherein each of the symbols comprises two bits.

5. The method of claim 2 wherein the first predetermined number of symbols is 5, the second predetermined number is 11, and the third predetermined number is 6.

6. The method of claim 2 wherein the step of providing an at least one combined portion of training information comprises the step of providing an at least one combined portion having a number of symbols of training information that is equal to the second predetermined number of symbols.

7. A method as claimed in claim 6, wherein the an at least one combined portion has 11 symbols.

8. The method as claimed in claim 1 wherein the step of using the at least one combined portion of training information and the second portion of training information to train the radio comprises the step of comparing in a predetermined manner the second portion with the at least one combined portion.

9. The method as claimed in claim 8 wherein the step of comparing in a predetermined manner the second portion with the at least one combined portion comprises the steps of:

computing for the second portion a first plurality of values that correspond to a calculated relationship between a correlation value and an energy value and selecting a first maximum value from amongst the first plurality of values;

computing for the at least one combined portion a second plurality of values that correspond to a calculated relationship between a correlation value and an energy value and selecting a second maximum value from amongst the second plurality of values;

comparing the first and second maximum values.

10. The method as claimed in claim 9 wherein the second plurality of values that correspond to a calculated relationship between a correlation value and an energy value comprises:

at least one plurality of values computed for the at least one combined portion.

11. The method of claim 9 wherein the second maximum value from amongst the second plurality of values comprises:

a maximum value selected from at least one plurality of values of the second plurality of values.

12. A method of training a radio comprising, in a radio, the steps of:

receiving a first slot of information containing at least an initial portion containing a first predetermined number of symbols of training information, a second portion containing a second predetermined number of symbols of training information, which second portion is separated from the initial portion, and a concluding portion containing a third predetermined number of symbols of training information, which concluding portion is separated from the second portion, the initial portion and the concluding portion containing a training information of a first type and the second portion containing information from a second and third type;

combining at least one of;

the initial portion with the concluding portion of a previous slot of information; and

the concluding portion of the first slot of information with an initial portion of a subsequent slot of information;

to provide an at least one combined portion training information; and

using the at least one combined portion of training information and the second portion of training information to train the radio.

13. The method of claim 12 wherein the first predetermined number of symbols is 5, the second predetermined number is 11, and the third predetermined number is 6.

14. The method of claim 12 wherein the step of providing an at least one combined portion of training information comprises the step of providing an at least one combined portion having a number of symbols of training information that is equal to the second predetermined number of symbols.

15. The method of claim 12 wherein each of the symbols comprises two bits.

16. The method of claim 15 wherein the step of providing an at least one combined portion of training information comprises the step of providing an at least one combined portion having a number of symbols of training information that is equal to the second predetermined number of symbols.

17. The method of claim 15 wherein the first predetermined number of symbols is 5, the second predetermined number is 11, and the third predetermined number is 6.

18. The method of claim 17 wherein the step of providing an at least one combined portion of training information comprises the step of providing an at least one combined portion having a number of symbols of training information that is equal to the second predetermined number of symbols.

19. A method of training a radio comprising, in a radio, the steps of:

receiving a first slot of information containing at least an initial portion containing training information, a second portion containing training information, which second portion is separated from the initial portion, and a concluding portion containing training information, which concluding portion is separated from the second portion, the initial portion and the concluding portion containing a training information of a first type and the second portion containing information from a second and third type;

combining at least one of;

the initial portion with the concluding portion of a previous slot of information; and

the concluding portion of the first slot of information with an initial portion of a subsequent slot of information;

to provide an at least one combined portion training information; and

using the at least one combined portion of training information and the second portion of training information to train the radio.

20. The method of claim 19 wherein the step of providing an at least one combined portion of training information comprises the step of providing an at least one combined portion having a predetermined number of symbols of training information.