Continuous beamforming for a MIMO-OFDM system
First Claim
1. A method for receiving data in a multiple-input and multiple-output communication system, comprising:
- receiving a multiple-input and multiple-output pilot;
determining an effective multiple-input and multiple-output channel response based on estimated initial effective multiple-input and multiple-output channel response that is based on the multiple-input and multiple-output pilot; and
performing receiver spatial processing on received symbols for a symbol period with the determined effective multiple-input and multiple-output channel response to recover data symbols.
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Accused Products
Abstract
A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.
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Citations
40 Claims
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1. A method for receiving data in a multiple-input and multiple-output communication system, comprising:
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receiving a multiple-input and multiple-output pilot; determining an effective multiple-input and multiple-output channel response based on estimated initial effective multiple-input and multiple-output channel response that is based on the multiple-input and multiple-output pilot; and performing receiver spatial processing on received symbols for a symbol period with the determined effective multiple-input and multiple-output channel response to recover data symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless device in a multiple-input and multiple-output communication system, comprising:
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a processor; memory in electronic communication with the processor; instructions stored in the memory, the instructions being executable by the processor to; receive a multiple-input and multiple-output pilot; determine an effective multiple-input and multiple-output channel response based on an estimated initial effective multiple-input and multiple-output channel response that is based on the multiple-input and multiple-output pilot; and perform receiver spatial processing on received symbols for a symbol period with the determined effective multiple-input and multiple-output channel response to recover data symbols. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus configured for receiving data in a multiple-input and multiple-output communication system, comprising:
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means for receiving a multiple-input and multiple-output pilot; means for determining an effective multiple-input and multiple-output channel response based on an estimated initial effective multiple-input and multiple-output channel response that is based on the multiple-input and multiple-output pilot; and means for performing receiver spatial processing on received symbols for a symbol period with the determined effective multiple-input and multiple-output channel response to recover data symbols. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A computer-program product for receiving data in a multiple-input and multiple-output communication system, the computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:
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code for causing a wireless device to receive a multiple-input and multiple-output pilot; code for causing the wireless device to determine an effective multiple-input and multiple-output channel response based on an estimated initial effective multiple-input and multiple-output channel response that is based on the multiple-input and multiple-output pilot; and code for causing the wireless device to perform receiver spatial processing on received symbols for a symbol period with the determined effective multiple-input and multiple-output channel response to recover data symbols. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification