Gain Factor/Matrix for Whole Link Channel Reciprocity in TDD Mimo Relay System
First Claim
1. A method comprising:
- measuring at an apparatus received power of a first signal received from a first entity, and measuring at the apparatus received power of a second signal received from a second entity;
determining by the apparatus a gain factor using the measured received powers of the first signal and of the second signal; and
forwarding a signal by either;
for the case in which transmit power from the apparatus to the second entity is considered as a benchmark, using the gain factor to determine a second signal transmit power and forwarding the second signal from the apparatus to the first entity using the determined second signal transmit power;
orfor the case in which the transmit power from the apparatus to the first entity is considered as the benchmark, using the gain factor to determine a first signal transmit power and forwarding the first signal from the apparatus to the second entity using the determined first signal transmit power.
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Accused Products
Abstract
Measured are received power of a first signal received from a first entity, and received power of a second signal received from a second entity. A gain factor (or a matrix of gain factors if multiple antennas are used) is determined using the measured received powers of the first signal and of the second signal. If transmit power from the apparatus to the second entity is considered as the benchmark, the second signal is forwarded from the apparatus to the first entity using a second signal transmit power that is determined using the gain factor. Or, if transmit power from the apparatus to the first entity is considered as the benchmark, the first signal is forwarded from the apparatus to the second entity using a first signal transmit power that is determined using the gain factor. Method, apparatus, and memory storing computer program are detailed.
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Citations
20 Claims
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1. A method comprising:
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measuring at an apparatus received power of a first signal received from a first entity, and measuring at the apparatus received power of a second signal received from a second entity; determining by the apparatus a gain factor using the measured received powers of the first signal and of the second signal; and forwarding a signal by either; for the case in which transmit power from the apparatus to the second entity is considered as a benchmark, using the gain factor to determine a second signal transmit power and forwarding the second signal from the apparatus to the first entity using the determined second signal transmit power;
orfor the case in which the transmit power from the apparatus to the first entity is considered as the benchmark, using the gain factor to determine a first signal transmit power and forwarding the first signal from the apparatus to the second entity using the determined first signal transmit power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform; measuring received power of a first signal received from a first entity, and measuring received power of a second signal received from a second entity; determining a gain factor using the measured received powers of the first signal and of the second signal; and forwarding a signal by either; for the case in which transmit power from the apparatus to the second entity is considered as a benchmark, using the gain factor to determine a second signal transmit power and forwarding the second signal from the apparatus to the first entity using the determined second signal transmit power;
orfor the case in which the transmit power from the apparatus to the first entity is considered as the benchmark, using the gain factor to determine a first signal transmit power and forwarding the first signal from the apparatus to the second entity using the determined first signal transmit power. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A memory storing a computer readable program of instructions which when executed by a processor cause the processor to perform actions comprising:
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measuring received power of a first signal received from a first entity, and measuring received power of a second signal received from a second entity; determining a gain factor using the measured received powers of the first signal and of the second signal; and forwarding a signal by either; for the case in which transmit power from the apparatus to the second entity is considered as a benchmark, using the gain factor to determine a second signal transmit power and forwarding the second signal from the apparatus to the first entity using the determined second signal transmit power;
orfor the case in which the transmit power from the apparatus to the first entity is considered as the benchmark, using the gain factor to determine a first signal transmit power and forwarding the first signal from the apparatus to the second entity using the determined first signal transmit power. - View Dependent Claims (19, 20)
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Specification