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1. WO2004062118 - OFDM AMELIORE PAR UTILISATION D'ETATS DE POLARISATION ALTERNES

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[ EN ]

CLAIMS

1. An Orthogonal Frequency Division Multiplexer (OFDM) transmitter apparatus, comprising:
a mapper that maps a first portion of data to be transmitted to a first polarization state and a second portion of data to be transmitted to a second polarization state;
a first transmitter that transmits the first portion of the data as a set of first OFDM subcarriers using a first antenna exhibiting a first polarization; and
a second transmitter that transmits the second portion of the data as a set of second OFDM subcarriers using a second antenna exhibiting a second polarization, wherein the first polarization is orthogonal to the second polarization.

2. The OFDM apparatus according to claim 1 , wherein the first s et o f OFDM subcarriers are separated in frequency by a frequency spacing, and wherein the second set of OFDM subcarriers are also separated by the frequency spacing.

3. The OFDM apparatus according to claim 1 , wherein the first set of OFDM subcarriers are interleaved in at least one of frequency, time and polarization with the second set of OFDM subcarriers.

4. An Orthogonal Frequency Division Multiplexer (OFDM) receiver apparatus, comprising:
a first antenna exhibiting a first polarization;
a second antenna exhibiting a second polarization;
a first receiver receiving a first set of polarized OFDM subcarriers from the first antenna;
a second receiver receiving a second set of polarized OFDM subcarriers from the second antenna; and
a decoder receiving the first and second sets of OFDM subcarriers from the first and second receivers and decoding the first and second sets of OFDM subcarriers into a stream of data,
wherein the first polarization is orthogonal to the second polarization.

5. The O FDM apparatus a ccording to e laim 4 , w herein t he first s et o f O FDM subcarriers are separated in frequency by a frequency spacing, and wherein the second set of OFDM subcarriers are also separated by the frequency spacing.

6. The O FDM apparatus a ccording to e laim 4 , wherein t he first s et o f O FDM subcarriers are interleaved in at least one of frequency, time and polarization with the second set of OFDM subcarriers.

7. A transmitter apparatus, comprising:
a mapper that maps a first portion of data to be transmitted to a first polarization state and a second portion of data to be transmitted to a second polarization state;
a first transmitter that transmits the first portion of the data using a first antenna exhibiting a first polarization; and
a second transmitter that transmits the second portion of the data using a second antenna exhibiting a second polarization,
wherein the first polarization is orthogonal to the second polarization.

8. A receiver apparatus, comprising:
a first antenna exhibiting a first polarization;
a second antenna exhibiting a second polarization;
a first receiver receiving a first signal from the first antenna;
a second receiver receiving a second signal from the second antenna; and
a decoder receiving the first and second signals from the first and second receivers and decoding the first and second signals into a stream of data,
wherein the first polarization is orthogonal to the second polarization.

9. An Orthogonal Frequency Division Multiplexing (OFDM) transmitter method, comprising:
receiving data to be transmitted;
mapping a first portion of the data to a first polarization state and a second portion of the data to a second polarization state;
transmitting t he first p ortion o f t he d ata a s a s et o f first OFDM s ubcarriers-using an antenna exhibiting a first polarization; and
transmitting the second portion of the data as a set of second OFDM subcarriers using an antenna exhibiting a second polarization,
wherein the first polarization is orthogonal to the second polarization.

10. The OFDM transmitter method according to claim 9, wherein the data to be transmitted are multiplexed from a plurality of sources.

11. An Orthogonal Frequency Division Multiplexing (OFDM) receiver method, comprising:
receiving a first set of polarized OFDM subcarriers from a first antenna that exhibits a first polarization;
receiving a second set of polarized OFDM subcarriers from a second antenna that exhibits a second polarization; and
decoding the first and second sets of OFDM subcarriers into a stream of data, wherein the first polarization is orthogonal to the second polarization.

12. The OFDM receiver method according to claim 11, further comprising demultiplexing the stream of data into a plurality data streams.