Two-way relay apparatus and method thereof
First Claim
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1. A relay apparatus of a two-way relay system, the relay apparatus comprising:
- at least one transceiver; and
at least one processor coupled to the at least one transceiver,wherein the at least one processor is configured to;
receive, from a terminal, a first signal comprising a self-interference cancellation (SIC) indicator;
determine, based on the SIC indicator, availability of SIC for the terminal; and
transmit, to the terminal, a second signal precoded based on the first signal,wherein the second signal comprises a user-specific reference signal (URS) corresponding to the terminal, andwherein the URS is used, by the terminal, for performing the SIC.
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Abstract
One or more embodiments provide an apparatus and a method to estimate channel information even when channel information is not accurately known and design a relay filter based on the estimated information in a two-way relay system where a terminal having a single antenna and a relay exist. A relay apparatus of a two-way relay system includes a receiver, a controller, and a transmitter. The receiver receives a signal from at least one terminal. The controller estimates a channel between the terminals based on the received signal, and calculates a receiver matrix and a precoder. The transmitter transmits a signal precoded by the precoder.
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Citations
15 Claims
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1. A relay apparatus of a two-way relay system, the relay apparatus comprising:
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at least one transceiver; and at least one processor coupled to the at least one transceiver, wherein the at least one processor is configured to; receive, from a terminal, a first signal comprising a self-interference cancellation (SIC) indicator; determine, based on the SIC indicator, availability of SIC for the terminal; and transmit, to the terminal, a second signal precoded based on the first signal, wherein the second signal comprises a user-specific reference signal (URS) corresponding to the terminal, and wherein the URS is used, by the terminal, for performing the SIC. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An operating method by a relay of a two-way relay system, the method comprising:
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receiving, from a terminal, a first signal comprising a self-interference cancellation (SIC) indicator; determining, based on the SIC indicator, availability of SIC for the terminal; and transmitting, to the terminal, a second signal precoded based on the first signal, wherein the second signal comprises a user-specific reference signal (URS) corresponding to the terminal, and wherein the URS is used, by the terminal, for performing the SIC. - View Dependent Claims (8, 9, 10, 11)
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12. A terminal apparatus of a two-way relay system, the apparatus comprising:
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at least one transceiver; and at least one processor coupled to the at least one transceiver, wherein the at least one processor is configured to; transmit, to a relay station, a first signal comprising a self-interference cancellation (SIC) indicator; receive, from the relay station, a second signal precoded based on the first signal the second signal comprising a user-specific reference signal (URS) corresponding to the terminal; and perform (SIC) based on the URS, wherein the SIC indicator is used to determine availability of SIC for the terminal by the relay station. - View Dependent Claims (13, 14, 15)
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Specification