Multi-modulation transmitter, receiver and methods for handling multi-modulation in wireless communication systems
First Claim
1. A multi-modulation transmitter configured to transmit a multicarrier signal to multiple different receivers, at least one of the receivers is a receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing, OFDM, the multi-modulation transmitter comprising:
- a data mapping unit configured to map data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers;
an Inverse Fast Fourier Transform, IFFT, unit configured to transform the mutually orthogonal subcarrier signals to a multicarrier signal in the time domain;
a cyclic prefix unit configured to;
determine a Cyclic Prefix, CP, length of the multicarrier signal based on a symbol rate of the receiver using a modulation scheme other than OFDM; and
insert the determined Cyclic Prefix in the multicarrier signal; and
a radio unit configured to transmit the multicarrier signal to the multiple different receivers.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-modulation transmitter configured to transmit a multicarrier signal to multiple different receivers. At least one of the receivers is a receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing (OFDM). The multi-modulation transmitter includes a data mapping unit configured to map data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers. An Inverse Fast Fourier Transform unit is configured to transform the mutually orthogonal subcarrier signals to a multicarrier signal in the time domain. A cyclic prefix unit is configured to determine a Cyclic Prefix length of the multicarrier signal based on a symbol rate of the receiver using a modulation scheme other than OFDM, and to insert the determined Cyclic Prefix in the multicarrier signal. A radio unit is configured to transmit the multicarrier signal to the multiple different receivers.
12 Citations
22 Claims
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1. A multi-modulation transmitter configured to transmit a multicarrier signal to multiple different receivers, at least one of the receivers is a receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing, OFDM, the multi-modulation transmitter comprising:
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a data mapping unit configured to map data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers; an Inverse Fast Fourier Transform, IFFT, unit configured to transform the mutually orthogonal subcarrier signals to a multicarrier signal in the time domain; a cyclic prefix unit configured to; determine a Cyclic Prefix, CP, length of the multicarrier signal based on a symbol rate of the receiver using a modulation scheme other than OFDM; and insert the determined Cyclic Prefix in the multicarrier signal; and a radio unit configured to transmit the multicarrier signal to the multiple different receivers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network node in a wireless communication network comprising a multi-modulation transmitter, the multi-modulation transmitter being configured to transmit a multicarrier signal to multiple different receivers, at least one of the receivers is a receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing, OFDM, the multi-modulation transmitter comprising:
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a data mapping unit configured to map data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers; an Inverse Fast Fourier Transform, IFFT, unit configured to transform the mutually orthogonal subcarrier signals to a multicarrier signal in the time domain; a cyclic prefix unit configured to; determine a Cyclic Prefix, CP, length of the multicarrier signal based on a symbol rate of the receiver using a modulation scheme other than OFDM; and insert the determined Cyclic Prefix in the multicarrier signal; and a radio unit configured to transmit the multicarrier signal to the multiple different receivers.
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9. A non-OFDM receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing, OFDM, the non-OFDM receiver comprising:
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a radio unit configured to receive a multicarrier signal carrying data also targeting OFDM receivers; a frequency separation unit configured to separate signals carrying data targeting the non-OFDM receiver from the multicarrier signal; and a demapping unit configured to, in a first reception mode, demap the signals targeting the non-OFDM receiver using a first repetition code matching a symbol duration of the multicarrier signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for transmitting a multicarrier signal to multiple different receivers, at least one of the receivers is an Orthogonal Frequency-Division Multiplexing, OFDM, receiver and at least one of the receivers is a receiver using another modulation scheme, the method comprising:
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mapping data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers; transforming the orthogonal carriers to a multicarrier signal in the time domain; determining a Cyclic Prefix, CP, length of the multicarrier signal based on the symbol rate of the receiver using another modulation scheme; inserting the determined Cyclic Prefix in the multicarrier signal; and transmitting the multicarrier signal to the multiple different receivers. - View Dependent Claims (16, 17)
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18. A non-transitory computer storage media storing computer program code which, when executed by a processor on a multi-modulation transmitter, causes the multi-modulation transmitter to perform a method for transmitting a multicarrier signal to multiple different receivers, at least one of the receivers is an Orthogonal Frequency-Division Multiplexing, OFDM, receiver and at least one of the receivers is a receiver using another modulation scheme, the method comprising:
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mapping data targeting the different receivers to mutually orthogonal subcarrier signals, in accordance with the respective modulation schemes of the different receivers; transforming the orthogonal carriers to a multicarrier signal in the time domain; determining a Cyclic Prefix, CP, length of the multicarrier signal based on the symbol rate of the receiver using another modulation scheme; inserting the determined Cyclic Prefix in the multicarrier signal; and transmitting the multicarrier signal to the multiple different receivers.
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19. A method for receiving a multicarrier signal carrying data to multiple different receivers, at least one of the receivers is an Orthogonal Frequency-Division Multiplexing, OFDM, receiver, the method comprising:
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receiving the multicarrier signal; separating signals carrying data targeting the non-OFDM receiver from the multicarrier signal; and in a first reception mode, demapping the signals targeting the non-OFDM receiver using a first repetition code matching a symbol duration of the multicarrier signal. - View Dependent Claims (20, 21)
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22. A non-transitory computer storage media storing computer program code which, when executed by a processor on a wireless device, the wireless device comprising a non-OFDM receiver using a modulation scheme other than Orthogonal Frequency-Division Multiplexing, OFDM,
causes the wireless device to perform a method, the method comprising: -
receiving a multicarrier signal; separating signals carrying data targeting the non-OFDM receiver from the multicarrier signal; and in a first reception mode, demapping the signals targeting the non-OFDM receiver using a first repetition code matching a symbol duration of the multicarrier signal.
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Specification