Receiving device, receiving method, program and wireless communication system
First Claim
1. A receiving device comprising:
- a radio receiving unit configured to receive radio signals transmitted from a plurality of transmitting antennas using a plurality of receiving antennas and to output the received signals as digital signals;
a frequency control unit configured to detect a frequency error contained in the received signals and to correct the frequency error;
a channel estimation unit configured to estimate a channel matrix, of which each element corresponds to a respective pair of a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna each being one of the pluralities of transmitting antennas and receiving antennas;
an equalization unit configured to equalize the error corrected received signals by using the channel matrix estimated by the channel estimation unit;
a demodulation and decoding unit configured to demodulate and decode the received signals equalized by the equalization unit; and
an error estimation unit configured to estimate a channel variation component indicating temporal variation of characteristics of each channel and a phase error component indicating phase error remaining in the received signals following frequency error correction by the frequency control unit, whereinthe estimation is based on a relational expression that includes the estimated channel matrix, the received signals, and a decoding result by the demodulation and decoding unit or an equalization result by the equalization unit.
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Accused Products
Abstract
A receiving device is provided that includes a radio receiving unit to receive radio signals transmitted from multiple transmitting antennas by multiple receiving antennas and output received signals being digital signals, a frequency control unit to detect and correct a frequency error contained in the received signals, a channel estimation unit to estimate a channel matrix of which each element corresponds to respective pair of each transmitting antenna and each receiving antenna, an equalization unit to equalize the received signals by using the estimated channel matrix, a demodulation and decoding unit to demodulate and decode the equalized received signals, and an error estimation unit to estimate a channel variation component indicating temporal variation of characteristics of each channel and a phase error component remaining in the received signals based on the channel matrix, the received signals, and a decoding result or an equalization result.
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Citations
12 Claims
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1. A receiving device comprising:
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a radio receiving unit configured to receive radio signals transmitted from a plurality of transmitting antennas using a plurality of receiving antennas and to output the received signals as digital signals; a frequency control unit configured to detect a frequency error contained in the received signals and to correct the frequency error; a channel estimation unit configured to estimate a channel matrix, of which each element corresponds to a respective pair of a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna each being one of the pluralities of transmitting antennas and receiving antennas; an equalization unit configured to equalize the error corrected received signals by using the channel matrix estimated by the channel estimation unit; a demodulation and decoding unit configured to demodulate and decode the received signals equalized by the equalization unit; and an error estimation unit configured to estimate a channel variation component indicating temporal variation of characteristics of each channel and a phase error component indicating phase error remaining in the received signals following frequency error correction by the frequency control unit, wherein the estimation is based on a relational expression that includes the estimated channel matrix, the received signals, and a decoding result by the demodulation and decoding unit or an equalization result by the equalization unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for receiving radio signals in a receiving device, comprising the steps of:
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receiving radio signals transmitted from a plurality of transmitting antennas using a plurality of receiving antennas and outputting the received signals as digital signals; detecting a frequency error contained in the received signals and correcting the frequency error; estimating a channel matrix, of which each element corresponds to a respective pair of a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna each being one of the pluralities of transmitting antennas and receiving antennas; equalizing the error corrected received signals by using the estimated channel matrix estimated by the channel estimation unit; demodulating and decoding the equalized received signals; and estimating a channel variation component indicating temporal variation of characteristics of each channel and a phase error component indicating phase error remaining in the received signals following frequency error correction, wherein the estimation is based on a relational expression that includes the estimated channel matrix, the received signals, and a decoding result or an equalization result.
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11. A non-transitory computer readable medium having instructions stored therein that when executed by a processing circuit controlling a receiving device, the receiving device comprising:
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a radio receiving unit configured to receive radio signals transmitted from a plurality of transmitting antennas using a plurality of receiving antennas and to output the received signals as digital signals; a frequency control unit configured to detect a frequency error contained in the received signals and to correct the frequency error; a channel estimation unit configured to estimate a channel matrix, of which each element corresponds to a respective pair of a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna each being one of the pluralities of transmitting antennas and receiving antennas; an equalization unit configured to equalize the error corrected received signals by using the channel matrix estimated by the channel estimation unit; and a demodulation and decoding unit configured to demodulate and decode the received signals equalized by the equalization unit, causes the processing circuit to function as an error estimation unit configured to estimate a channel variation component indicating temporal variation of characteristics of each channel and a phase error component indicating phase error remaining in the received signals following frequency error correction by the frequency control unit, wherein the estimation is based on a relational expression that includes the estimated channel matrix, the received signals, and a decoding result by the demodulation and decoding unit or an equalization result by the equalization unit.
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12. A wireless communication system comprising:
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a transmitting device configured to transmit radio signals from a plurality of transmitting antennas; and a receiving device including; a radio receiving unit configured to receive the radio signals using a plurality of receiving antennas and to output the received signals as digital signals, a frequency control unit configured to detect a frequency error contained in the received signals and to correct the frequency error, a channel estimation unit configured to estimate a channel matrix, of which each element corresponds to a respective pair of a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna each being one of the pluralities of transmitting antennas and receiving antennas, an equalization unit configured to equalize the error corrected received signals by using the channel matrix estimated by the channel estimation unit, a demodulation and decoding unit configured to demodulate and decode the received signals equalized by the equalization unit, and an error estimation unit configured to estimate a channel variation component indicating temporal variation of characteristics of each channel and a phase error component indicating phase error remaining in the received signals following frequency error correction by the frequency control unit, wherein the estimation is based on a relational expression that includes the estimated channel matrix, the received signals, and a decoding result by the demodulation and decoding unit or an equalization result by the equalization unit.
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Specification