OPTIMAL MIMO ISI CHANNEL ESTIMATION USING LOOSELY SYNCHRONIZED CODES AND THEIR VARIATIONS
First Claim
Patent Images
1. A method in a multiple-input multiple-output (MIMO)-based wireless network, the method comprising:
- receiving a training signal from a MIMO-based wireless network, the training signal comprising a set of at least one of loosely synchronized (LS) codes or shifted LS codes; and
estimating channel state information (CSI) for at least one channel based at least in part on the training sequence.
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Abstract
A training-based channel estimation technique is provided to estimate channel state information for MIMO systems that is highly energy efficient and optimal in terms of Cramér-Rao lower bound (CRLB). The technique employs loosely synchronized (LS) codes or shifted LS codes. The codes can be generated using a fast Golay correlator and an efficient Golay correlator. A low-complexity implementation is also provided.
54 Citations
20 Claims
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1. A method in a multiple-input multiple-output (MIMO)-based wireless network, the method comprising:
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receiving a training signal from a MIMO-based wireless network, the training signal comprising a set of at least one of loosely synchronized (LS) codes or shifted LS codes; and estimating channel state information (CSI) for at least one channel based at least in part on the training sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer-readable medium containing instructions that when executed performs the method of:
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determining a training sequence of at least one of loosely synchronized (LS) codes or shifted LS codes; transmitting the training sequence over a multiple-input multiple-output (MIMO) wireless network; and receiving an indication of a precoder scheme from a remote MIMO device, the precoder scheme based on estimated channel state information (CSI) determined by the training sequences. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A apparatus used in a multiple-input, multiple-output (MIMO) network comprising:
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a memory; a plurality of antennas; a channel estimation component that receives a training signal from at least some of the plurality of antennas comprising at least one of loosely synchronized (LS) codes or shifted loosely synchronized codes and estimates the channel state information (CSI) based at least in part on the training signal. - View Dependent Claims (17, 18, 19, 20)
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Specification