Variable cyclic prefix in mixed-mode wireless communication systems
First Claim
1. A method in a wireless communication network infrastructure entity, the method comprising:
- transmitting a plurality of symbols in a sequence, some of the plurality of symbols associated with a first transmission mode and some other of the plurality of symbols associated with a second transmission mode different than the first transmission mode;
before transmitting, formatting the symbols associated with the first transmission mode with a first cyclic prefix and formatting the symbols associated with the second transmission mode with a second prefix, the first cyclic prefix different than the second cyclic prefix.
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Abstract
A method in a wireless communication network infrastructure entity (200), including transmitting a plurality of symbols in a sequence, some of the symbols associated with a first transmission mode, for example, point-to-point, and some other symbols associated with a second transmission mode, for example, point-to-multipoint, different than the first transmission mode. And formatting the symbols associated with the first transmission mode with a first cyclic prefix and formatting the symbols associated with the second transmission mode with a second prefix, before transmitting the symbols. In one embodiment, the cyclic prefixes have different durations.
192 Citations
22 Claims
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1. A method in a wireless communication network infrastructure entity, the method comprising:
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transmitting a plurality of symbols in a sequence, some of the plurality of symbols associated with a first transmission mode and some other of the plurality of symbols associated with a second transmission mode different than the first transmission mode;
before transmitting, formatting the symbols associated with the first transmission mode with a first cyclic prefix and formatting the symbols associated with the second transmission mode with a second prefix, the first cyclic prefix different than the second cyclic prefix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method in a wireless communication device, the method comprising:
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transmitting a sequence of symbols, each symbol transmitted by one of at least two different transmission modes, each symbol formatted with a cyclic prefix having a characteristic dependent on the mode by which the symbol is transmitted, the cyclic prefix characteristic different for different transmission modes;
before transmitting the symbols, transmitting information from which a recipient of the symbols may determine the cyclic prefix characteristic of at least some of the symbols. - View Dependent Claims (15, 16, 17, 18)
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19. A method in a wireless communication handset, the method comprising:
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receiving a plurality of symbols in a sequence, each symbol transmitted by one of at least two different transmission modes, each symbol formatted with a cyclic prefix having a cyclic prefix duration dependent on a mode by which the symbol is transmitted, the cyclic prefix duration different for the different transmission modes;
demodulating the symbols using a priori information of the cyclic prefix duration of each symbol in the sequence. - View Dependent Claims (20, 21, 22)
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Specification