Method for transmitting at least one multi-carrier signal consisting of OFDM-OQAM symbols

• US 9,479,381 B2
• Filed: 12/19/2012
• Issued: 10/25/2016
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Orange S.A.
• Original Assignee: Orange S.A.
• Inventors: Siohan, Pierre, Jahan, Bruno, Phan Huy, Dinh Thuy, Helard, Maryline, Dubois, Thierry
• Primary Examiner(s): Perez, James M
• Application Number:
  US14/364,971
• Publication Number:
  US 20140348252A1
• Time in Patent Office: 1,406 Days
• Field of Search: 375229-235, 375259-285, 375295-352
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04L 1/0668 Orthogonal systems, e.g. using Alamouti codes
• CPC Class Codes: H04L 27/26412 Filtering over the entire frequency band, e.g. filtered orthogonal frequency-division multiplexing [OFDM]
• CPC Class Codes: H04L 27/26536 Filtering over the entire frequency band, e.g. filtered orthogonal frequency division multiplexing [OFDM]
• CPC Class Codes: H04L 27/2698 double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
• CPC Class Codes: H04L 27/368 adaptive predistortion

Abstract

Disclosed is a transmission method of transmitting at least one multicarrier signal made up of OFDM-OQAM symbols to a receive antenna of a receiver device, the transmission method being for use by a transmitter device having at least one transmit antenna. In one embodiment, the method comprises, for each transmit antenna of the transmitter device, filtering OFDM-OQAM symbols associated with the transmit antenna using a time-reversal prefilter defined from an estimate of the transmission channel between the transmit antenna and the receive antenna and transmitting the filtered OFDM-OQAM symbols via the transmit antenna over the transmission channel.

Claims

1. A transmission method for transmitting at least one multicarrier signal made up of Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) symbols to a receive antenna of a receiver device, said transmission method being for use by a transmitter device having at least one transmit antenna, said transmission method comprising, for each transmit antenna of the at least one transmit antenna of the transmitter device, the processes of:

filtering, using the transmitter device, the OFDM-OQAM symbols associated with the transmit antenna using a time-reversal prefilter defined from an estimate of the transmission channel between said transmit antenna and said receive antenna; and

transmitting, using the transmitter device, the filtered OFDM-OQAM symbols via said transmit antenna over said transmission channel.

2. A transmission method according to claim 1, wherein the transmitter device has a number N of transmit antennas greater than 1, said transmission method further comprising a coding process during which coding is applied to real value symbols, the coding being defined by a determined real coding matrix generating N coded symbol sequences associated with said N transmit antennas, a coded symbol of a coded symbol sequence associated with a transmit antenna modulating a carrier of a said OFDM-OQAM symbol associated with that antenna.

3. A transmission method according to claim 2, wherein the real coding matrix is a real orthogonal matrix.

4. A transmission method according to claim 2, wherein the coding applied during the coding step has a coding rate of 1.

5. A transmission method according to claim 2, wherein the coding applied during the coding step is space-time coding.

6. A transmission method according to claim 2, wherein the coding applied during the coding step is space-frequency coding.

7. A computer configured to implement the transmission method according to claim 1.

8. A non-transitory computer readable storage medium storing a computer program including instructions for executing steps of the transmission method according to claim 1 when executed by a computer.

9. A reception method for receiving an Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) type multicarrier signals including OFDM-OQAM symbols as transmitted by at least one transmit antenna of a transmitter device, wherein the transmitting device for each transmit antenna of the at least one transmit antenna performed filtering on the OFDM-OQAM symbols associated with the transmit antenna using a time-reversal prefilter defined from an estimate of a transmission channel between said transmit antenna and a receive antenna in order to generate and subsequently transmit the OFDM-OQAM signals, the reception method comprising:

receiving, using the receive antenna at a receiver device, an OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna of the transmitter device; and

demodulating, by a demodulator in the receiver device, said received OFDM-OQAM type multicarrier signal corresponding to the sum of the received OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna in order to recover the corresponding OFDM-OQAM symbols.

10. A communication method comprising:

filtering, using a transmitter device, Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) symbols associated with at least one transmit antenna using a time-reversal prefilter defined from an estimate of a transmission channel between each of the at least one transmit antenna and a receive antenna;

transmitting, using the transmitter device, the filtered OFDM-OQAM symbols via said at least one transmit antenna over said transmission channel as a corresponding OFDM-OQAM type multicarrier signal;

receiving, using the receive antenna at a receiver device, an OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna of the transmitter device; and

demodulating, by a demodulator in the receiver device, said received OFDM-OQAM type multicarrier signal corresponding to the sum of the received OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna in order to recover the corresponding OFDM-OQAM symbols.

11. A transmitter device having at least one transmit antenna and configured for transmitting at least one Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) type multicarrier signal via said at least one transmit antenna of said transmitter device to a receive antenna of a receiver device, said transmitter device comprising in association with each transmit antenna:

a filter in said transmitter device which filters OFDM-OQAM symbols associated with that transmit antenna, said filter comprising a time-reversal prefilter defined on the basis of an estimate of a transmission channel between said transmit antenna and said receive antenna;

said transmitter device being configured to transmit the filtered OFDM-OQAM symbols via said transmit antenna over said transmission channel.

12. A transmitter device according to claim 11, having a number N of transmit antennas greater than 1 and further configured to apply coding to real value symbols, the coding being defined by a determined real coding matrix generating N coded symbol sequences associated with said N transmit antennas, a coded symbol of a coded symbol sequence associated with a transmit antenna modulating a carrier of a said OFDM-OQAM symbol associated with that antenna.

13. A receiver device for receiving Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) type multicarrier signals including OFDM-OQAM symbols as transmitted by at least one transmit antenna of a transmitter device, wherein the transmitting device for each transmit antenna of the at least one transmit antenna filtered the OFDM-OQAM symbols associated with the transmit antenna using a time-reversal prefilter defined from an estimate of a transmission channel between said transmit antenna and a receive antenna in order to generate and subsequently transmit the OFDM-OQAM signals, the receiver device comprising:

a receiver and the receiving antenna for receiving an OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna of the transmitter device; and

a demodulator for demodulating said received OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna in order to recover the corresponding OFDM-OQAM symbols.

14. A communications system comprising:

a transmitter device configured for;

filtering Orthogonal Frequency Division Multiplexing Offset Quadrature Amplitude Modulation (OFDM-OQAM) symbols associated with at least one transmit antenna using a time-reversal prefilter defined from an estimate of a transmission channel between each of the at least one transmit antenna and a receive antenna;

transmitting the filtered OFDM-OQAM symbols via said at least one transmit antenna over said transmission channel as a corresponding OFDM-OQAM type multicarrier signal; and

a receiver device configured for;

receiving, using the receive antenna an OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna of the transmitter device; and

demodulating said received OFDM-OQAM type multicarrier signal corresponding to the sum of the OFDM-OQAM type multicarrier signals received from each of the at least one transmit antenna in order to recover the corresponding OFDM-OQAM symbols.