System, transmitter, method, and computer program product for utilizing an adaptive preamble scheme for multi-carrier communication systems

• US 20060045193A1
• Filed: 03/09/2005
• Published: 03/02/2006
• Est. Priority Date: 08/24/2004
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Stolpman, Victor, Waes, Nico Van
• Application Number:
  US11/075,976
• Publication Number:
  US 20060045193A1
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01

Abstract

A system, transmitter, method, and computer program product apply a performance improvement characteristic, such as phase rotation or power allocation, to both a known preamble and a data payload of a transmitted data packet, such that existing multi-carrier receivers are capable of decoding the data payload with the performance improvement characteristic applied. The performance improvement characteristic is applied by vector-matrix multiplication of the preamble and the data payload by the performance improvement characteristic.

Claims

1. A system for wirelessly communicating a data packet comprising a known preamble and a data payload using a multi-carrier signal, the system comprising:

a transmitter comprising a processing element capable of applying a performance improvement characteristic to the known preamble and to the data payload prior to transmission of the preamble and the data payload; and

a receiver comprising a processing element capable of receiving the preamble and the data payload, the processing element further capable of estimating a channel through which the preamble and the data payload were transmitted and estimating the performance improvement characteristic, wherein both estimations are based on comparing the received preamble to the known preamble, the processing element further capable of estimating the data payload based on the estimated channel and the estimated performance improvement characteristic.

2. The system of claim 1, wherein the processing element of the transmitter applies the performance improvement characteristic to the known preamble by multiplying a vector representing the known preamble by a matrix representing the performance improvement characteristic, and wherein the processing element of the transmitter applies the performance improvement characteristic to the data payload by multiplying a vector representing the data payload by the matrix representing the performance improvement characteristic.

3. The system of claim 1, wherein the performance improvement characteristic is a unitary rotational transform.

4. The system of claim 1, wherein the performance improvement characteristic is a power allocation.

5. The system of claim 1, wherein the processing element of the transmitter is further capable of applying a second performance improvement characteristic to the preamble and applying the second performance improvement characteristic to the data payload, wherein the performance improvement characteristic is a power allocation and the second performance improvement characteristic is a unitary rotational transform.

6. A transmitter for wirelessly communicating a data packet comprising a known preamble and a data payload using a multi-carrier signal, the transmitter comprising:

a processing element capable of applying a performance improvement characteristic to the known preamble and to the data payload prior to transmission of the preamble and the data payload.

7. The transmitter of claim 6, wherein the processing element applies the performance improvement characteristic to the known preamble by multiplying a vector representing the known preamble by a matrix representing the performance improvement characteristic, and wherein the processing element applies the performance improvement characteristic to the data payload by multiplying a vector representing the data payload by the matrix representing the performance improvement characteristic.

8. The transmitter of claim 6, wherein the performance improvement characteristic is a unitary rotational transform.

9. The transmitter of claim 6, wherein the performance improvement characteristic is a power allocation.

10. The transmitter of claim 6, wherein the processing element is further capable of applying a second performance improvement characteristic to the preamble and applying the second performance improvement characteristic to the data payload, wherein the performance improvement characteristic is a power allocation and the second performance improvement characteristic is a unitary rotational transform.

11. A method for wirelessly communicating a data packet comprising a known preamble and a data payload using a multi-carrier signal, the method comprising:

applying a performance improvement characteristic to the known preamble;

applying the performance improvement characteristic to the data payload; and

transmitting the preamble and the data payload.

12. The method of claim 11, wherein applying the performance improvement characteristic to the known preamble comprises multiplying a vector representing the known preamble by a matrix representing the performance improvement characteristic, and wherein applying the performance improvement characteristic to the data payload comprises multiplying a vector representing the data payload by the matrix representing the performance improvement characteristic.

13. The method of claim 11, wherein the performance improvement characteristic is a unitary rotational transform.

14. The method of claim 11, wherein the performance improvement characteristic is a power allocation.

15. The method of claim 11, further comprising:

applying a second performance improvement characteristic to the preamble; and

applying the second performance improvement characteristic to the data payload,

wherein the performance improvement characteristic is a power allocation and the second performance improvement characteristic is a unitary rotational transform.

16. The method of claim 11, further comprising:

receiving the preamble and the data payload;

estimating a channel through which the preamble and the data payload were transmitted and estimating the performance improvement characteristic, wherein both estimations are based on comparing the received preamble to the known preamble; and

estimating the data payload based on the estimated channel and the estimated performance improvement characteristic.

17. A computer program product for wirelessly communicating a data packet comprising a known preamble and a data payload using a multi-carrier signal on a transmitter adapted to enable wireless communication, the computer program product comprising at least one computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

a first executable portion capable of applying a performance improvement characteristic to the known preamble;

a second executable portion capable of applying the performance improvement characteristic to the data payload; and

a third executable portion capable of transmitting the preamble and the data payload.

18. The computer program product of claim 17, wherein the first executable portion applies the performance improvement characteristic to the known preamble by multiplying a vector representing the known preamble by a matrix representing the performance improvement characteristic, and wherein the second executable portion applies the performance improvement characteristic to the data payload by multiplying a vector representing the data payload by the matrix representing the performance improvement characteristic.

19. The computer program product of claim 17, wherein the performance improvement characteristic is a unitary rotational transform.

20. The computer program product of claim 17, wherein the performance improvement characteristic is a power allocation.

21. The computer program product of claim 17, further comprising:

a fourth executable portion capable of applying a second performance improvement characteristic to the preamble; and

a fifth executable portion capable of applying the second performance improvement characteristic to the data payload, wherein the performance improvement characteristic is a power allocation and the second performance improvement characteristic is a unitary rotational transform.