Transmit diversity processing for a multi-antenna communication system
First Claim
1. A method for processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:
- coding data bits of a data packet in accordance with a coding scheme to obtain coded data;
interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data;
selecting at least one OFDM symbol size, from at least a first OFDM size associated with S subbands and a second OFDM symbol size associated with L subbands, wherein L is greater than S; and
processing the interleaved data, in accordance with the selected OFDM symbol size, to obtain a stream of OFDM symbols of the selected OFDM symbol size for transmission on one or more transmit antenna pairs using a transmit diversity scheme.
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Accused Products
Abstract
For transmit diversity in a multi-antenna OFDM system, a transmitter encodes, interleaves, and symbol maps traffic data to obtain data symbols. The transmitter processes each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas either (1) in two OFDM symbol periods for space-time transmit diversity or (2) on two subbands for space-frequency transmit diversity. NT·(NT−1)/2 different antenna pairs are used for data transmission, with different antenna pairs being used for adjacent subbands, where NT is the number of antennas. The system may support multiple OFDM symbol sizes. The same coding, interleaving, and modulation schemes are used for different OFDM symbol sizes to simplify the transmitter and receiver processing. The transmitter performs OFDM modulation on the transmit symbol stream for each antenna in accordance with the selected OFDM symbol size. The receiver performs the complementary processing.
475 Citations
24 Claims
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1. A method for processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:
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coding data bits of a data packet in accordance with a coding scheme to obtain coded data; interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data; selecting at least one OFDM symbol size, from at least a first OFDM size associated with S subbands and a second OFDM symbol size associated with L subbands, wherein L is greater than S; and processing the interleaved data, in accordance with the selected OFDM symbol size, to obtain a stream of OFDM symbols of the selected OFDM symbol size for transmission on one or more transmit antenna pairs using a transmit diversity scheme. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hardware apparatus for processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:
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a processing unit for coding data bits of a data packet in accordance with a coding scheme to obtain coded data; a processing unit for interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data; a processing unit for selecting at least one OFDM symbol size, from at least a first OFDM size associated with S subbands and a second OFDM symbol size associated with L subbands, wherein L is greater than S; and a processing unit for processing the interleaved data, in accordance with the selected OFDM symbol size, to obtain a stream of OFDM symbols of the selected OFDM symbol size for transmission on one or more transmit antenna pairs using a transmit diversity scheme. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising:
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means for coding data bits of a data packet in accordance with a coding scheme to obtain coded data; means for interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data; means for selecting at least one OFDM symbol size, from at least a first OFDM size associated with S subbands and a second OFDM symbol size associated with L subbands, wherein L is greater than S; and means for processing the interleaved data, in accordance with the selected OFDM symbol size, to obtain a stream of OFDM symbols of the selected OFDM symbol size for transmission on one or more transmit antenna pairs using a transmit diversity scheme. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A computer-program product for processing data for transmission in a wireless multi-antenna orthogonal frequency division multiplexing (OFDM) communication system, comprising a memory unit having software codes stored thereon, the software codes being executable by one or more processors for:
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coding data bits of a data packet in accordance with a coding scheme to obtain coded data; interleaving the coded data in accordance with an interleaving scheme to obtain interleaved data; selecting at least one OFDM symbol size, from at least a first OFDM size associated with S subbands and a second OFDM symbol size associated with L subbands, wherein L is greater than S; and processing the interleaved data, in accordance with the selected OFDM symbol size, to obtain a stream of OFDM symbols of the selected OFDM symbol size for transmission on one or more transmit antenna pairs using a transmit diversity scheme. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification