System and method for a scale-invariant symbol demodulator
First Claim
1. A method for communicating over a multiple input multiple output (MIMO) channel, the method comprising:
- transmitting, by a base station (BS), a downlink MIMO signal to a user equipment (UE), wherein the downlink MIMO signal comprises multiple layers communicated directly to the UE in accordance with a phase parameter and a magnitude parameter; and
signaling, by the BS, the phase parameter to the UE without signaling the magnitude parameter to the UE, wherein both the phase parameter and the magnitude parameter are utilized by the UE to demodulate the downlink MIMO signal, the UE being adapted to estimate the magnitude parameter based at least on an additive white Gaussian noise (AWGN) vector associated with the downlink MIMO signal.
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Abstract
It is possible to improve the spectral efficiency of multi-layer multiple input multiple output (MIMO) transmissions by estimating the magnitude parameter at the receiver side, rather signaling the magnitude parameter from the transmitter to the receiver. In long term evolution (LTE) networks, the user equipment (UE) may estimate the power allocation (Pa) parameter by executing a series of steps. For example, the UE may define a single unknown variable from a received downlink MIMO signal, extend the single unknown scalar variable to a multivariate signal model for multiple channels (N), convert the multivariate signal model to a MIMO configured signal model, and then obtain the Pa parameter from the MIMO configured multivariate signal model.
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Citations
18 Claims
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1. A method for communicating over a multiple input multiple output (MIMO) channel, the method comprising:
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transmitting, by a base station (BS), a downlink MIMO signal to a user equipment (UE), wherein the downlink MIMO signal comprises multiple layers communicated directly to the UE in accordance with a phase parameter and a magnitude parameter; and signaling, by the BS, the phase parameter to the UE without signaling the magnitude parameter to the UE, wherein both the phase parameter and the magnitude parameter are utilized by the UE to demodulate the downlink MIMO signal, the UE being adapted to estimate the magnitude parameter based at least on an additive white Gaussian noise (AWGN) vector associated with the downlink MIMO signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A base station comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; transmit a downlink multiple input multiple output (MIMO) signal to a user equipment (UE), wherein the downlink MIMO signal comprises multiple layers communicated directly to the UE in accordance with a phase parameter and a magnitude parameter; and signal the phase parameter to the UE without signaling the magnitude parameter to the UE, wherein both the phase parameter and the magnitude parameter are utilized by the UE to demodulate the downlink MIMO signal, the UE being adapted to estimate the magnitude parameter based at least on an additive white Gaussian noise (AWGN) vector associated with the downlink MIMO signal.
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9. A method for communicating over a multiple input multiple output (MIMO) channel, the method comprising:
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receiving, by a user equipment (UE), a downlink MIMO signal from a base station (BS), wherein the downlink MIMO signal comprises multiple layers communicated directly to the UE; receiving, by the UE, a phase parameter associated with the downlink MIMO signal from the BS; estimating, by the UE, a magnitude parameter associated with the downlink MIMO signal based at least on an additive white Gaussian noise (AWGN) vector associated with the downlink MIMO signal; and demodulating the downlink MIMO signal in accordance with the phase parameter and the magnitude parameter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A user equipment (UE) comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; receive a downlink multiple input multiple output (MIMO) signal from a base station (BS), wherein the downlink MIMO signal comprises multiple layers communicated directly to the UE; receive a phase parameter associated with the downlink MIMO signal from the BS; estimate a magnitude parameter associated with the downlink MIMO signal based at least on an additive white Gaussian noise (AWGN) vector associated with the downlink MIMO signal; and demodulate the downlink MIMO signal in accordance with the phase parameter and the magnitude parameter. - View Dependent Claims (18)
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Specification