METHOD AND APPARATUS FOR MUTIPLEXING REFERENCE SIGNAL AND DATA IN A WIRELESS COMMUNICATION SYSTEM
First Claim
1. A method for wireless communication, comprising:
- obtaining reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence;
mapping the reference symbols to a first set of subcarriers in a symbol period;
mapping data symbols to a second set of subcarriers in the symbol period; and
generating a transmission symbol based on the mapped reference symbols and the mapped data symbols.
1 Assignment
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Accused Products
Abstract
Techniques for efficiently multiplexing a reference signal and data on different sets of subcarriers in the same symbol period are described. In one design, a user equipment (UE) performs a discrete Fourier transform (DFT) on a set of modulation symbols for data to obtain data symbols. The UE also obtains reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence. The UE maps the reference symbols to a first set of subcarriers and maps the data symbols to a second set of subcarriers. The UE then generates a transmission symbol based on the mapped reference symbols and the mapped data symbols. The UE may also transmit reference signals and data (i) in multiple symbol periods of a slot or a subframe and/or (ii) from multiple antennas using frequency division multiplexing (FDM) or code division multiplexing (CDM).
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Citations
40 Claims
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1. A method for wireless communication, comprising:
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obtaining reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence; mapping the reference symbols to a first set of subcarriers in a symbol period; mapping data symbols to a second set of subcarriers in the symbol period; and generating a transmission symbol based on the mapped reference symbols and the mapped data symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for wireless communication, comprising:
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means for obtaining reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence; means for mapping the reference symbols to a first set of subcarriers in a symbol period; means for mapping data symbols to a second set of subcarriers in the symbol period; and means for generating a transmission symbol based on the mapped reference symbols and the mapped data symbols. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An apparatus for wireless communication, comprising:
at least one processor configured to obtain reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence, to map the reference symbols to a first set of subcarriers in a symbol period, to map data symbols to a second set of subcarriers in the symbol period, and to generate a transmission symbol based on the mapped reference symbols and the mapped data symbols.
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22. A computer program product, comprising:
a non-transitory computer-readable medium comprising; code for causing at least one processor to obtain reference symbols generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence, code for causing the at least one processor to map the reference symbols to a first set of subcarriers in a symbol period, code for causing the at least one processor to map data symbols to a second set of subcarriers in the symbol period, and code for causing the at least one processor to generate a transmission symbol based on the mapped reference symbols and the mapped data symbols.
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23. A method for wireless communication, comprising:
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receiving a transmission symbol in a symbol period, the transmission symbol comprising reference symbols mapped to a first set of subcarriers and data symbols mapped to a second set of subcarriers, the reference symbols being generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence; processing the received transmission symbol to obtain received reference symbols from the first set of subcarriers and received data symbols from the second set of subcarriers; processing the received reference symbols to obtain a channel estimate; and processing the received data symbols based on the channel estimate to obtain demodulated data symbols. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An apparatus for wireless communication, comprising:
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means for receiving a transmission symbol in a symbol period, the transmission symbol comprising reference symbols mapped to a first set of subcarriers and data symbols mapped to a second set of subcarriers, the reference symbols being generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence; means for processing the received transmission symbol to obtain received reference symbols from the first set of subcarriers and received data symbols from the second set of subcarriers; means for processing the received reference symbols to obtain a channel estimate; and means for processing the received data symbols based on the channel estimate to obtain demodulated data symbols. - View Dependent Claims (34, 35, 36, 37, 38)
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39. An apparatus for wireless communication, comprising:
at least one processor configured to receive a transmission symbol in a symbol period, the transmission symbol comprising reference symbols mapped to a first set of subcarriers and data symbols mapped to a second set of subcarriers, the reference symbols being generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence, to process the received transmission symbol to obtain received reference symbols from the first set of subcarriers and received data symbols from the second set of subcarriers, to process the received reference symbols to obtain a channel estimate, and to process the received data symbols based on the channel estimate to obtain demodulated data symbols.
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40. A computer program product, comprising:
a non-transitory computer-readable medium comprising; code for causing at least one processor to receive a transmission symbol in a symbol period, the transmission symbol comprising reference symbols mapped to a first set of subcarriers and data symbols mapped to a second set of subcarriers, the reference symbols being generated based on a reference signal sequence corresponding to a cyclic shift of a base sequence, code for causing the at least one processor to process the received transmission symbol to obtain received reference symbols from the first set of subcarriers and received data symbols from the second set of subcarriers, code for causing the at least one processor to process the received reference symbols to obtain a channel estimate, and code for causing the at least one processor to process the received data symbols based on the channel estimate to obtain demodulated data symbols.
Specification