Transmitter apparatus, receiver apparatus, and radio communication system
1 Assignment
0 Petitions
Accused Products
Abstract
An SINR estimating unit of a receiver apparatus measures first and second demodulated signals to calculate SINR (ratio of signal power to sum of interference power and noise power) for each signal sequence. A transmission parameter deciding unit decides, based on the SINR, a transmission parameter used by a transmitter apparatus for controlling the transmission for each signal sequence, and then feeds the decided transmission parameter back to the transmitter apparatus. First and second mapping units of the transmitter apparatus controls, based on the transmission parameters as fed back, the modulation level for each signal sequence.
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Citations
28 Claims
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1-6. -6. (canceled)
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7. A receiver apparatus for receiving, by a plurality of receiver antennas, transmission signals transmitted from a transmitter apparatus by a plurality of transmitter antennas in a parallel manner and for estimating a channel matrix for causing the transmission signals to be related to received signals to demodulate the received signals based upon said channel matrix;
- the receiver apparatus comprises;
calculation means for calculating a physical amount so as to estimate a radio line quality with respect to each of signal series based upon only said channel matrix;
determination means for evaluating the radio line quality based upon the physical amount calculated by said calculation means so as to determine a transmission parameter in a next transmission operation by said transmitter apparatus with respect to each of the signal series;
transmission means for transmitting the transmission parameter determined by said determination means to said transmitter apparatus; and
detection means for detecting a change in the transmission parameter from the received signals with respect to each of the signal series. - View Dependent Claims (8, 9, 10, 11)
- the receiver apparatus comprises;
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12. A radio communication system comprising a transmitter apparatus for transmitting transmission signals by a plurality of transmitter antennas in a parallel manner;
- and a receiver apparatus for receiving said transmission signals (s1, s2) by a plurality of receiver antennas, a for estimating a channel matrix for causing the transmission signals to be related to received signals to demodulate the received signals based upon said channel matrix;
whereinsaid receiver apparatus comprises;
calculation means for calculating a physical amount so as to estimate a radio line quality with respect to each of signal series based upon only said channel matrix;
determination means for evaluating the radio line quality based upon the physical amount calculated by said calculation means so as to determine a transmission parameter in a next transmission operation by said transmitter apparatus with respect to each of the signal series;
transmission means for transmitting the transmission parameter determined by said determination means to said transmitter apparatus; and
detection means for detecting a change in the transmission parameter from the received signals with respect to each of the signal series; and
wherein,said transmitter apparatus comprises;
reception means for receiving said transmission parameter transmitted by said determining means; and
means for controlling the transmission operation with respect to each of the signal series based upon said transmission parameter received by said reception means. - View Dependent Claims (13, 14, 15, 16)
- and a receiver apparatus for receiving said transmission signals (s1, s2) by a plurality of receiver antennas, a for estimating a channel matrix for causing the transmission signals to be related to received signals to demodulate the received signals based upon said channel matrix;
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17. (canceled)
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18. A transmitter apparatus for transmitting data by a plurality of transmitter antennas in a parallel manner to a receiver apparatus for receiving by a plurality of receiver antennas, said transmitter apparatus being used in a radio communication system in which a channel matrix for causing the signal transmitted by said transmitter apparatus to be related to said signal detected by said receiver apparatus becomes identical to a channel matrix for causing the signal transmitted by said receiver apparatus to be related to said signal detected by said transmitter apparatus;
- wherein,
said transmitter apparatus comprises;
estimation means for estimating said channel matrix;
calculation means for calculating a physical amount so as to estimate a radio line quality with respect to each of signal series based upon only said channel matrix;
determination means for evaluating the radio line quality based upon the physical amount calculated by said calculation means so as to determine a transmission parameter in a next transmission operation with respect to each of the signal series based upon the transmission parameter determined by said determination means. - View Dependent Claims (19, 20, 21, 22)
- wherein,
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23. A radio communication system comprising a transmitter apparatus for transmitting transmission signals by a plurality of transmitter antennas in a parallel manner;
- and a receiver apparatus for receiving said transmission signals by a plurality of receiver antennas, a channel matrix for causing the signal transmitted by said transmitter apparatus to be related to said signal detected by said receiver apparatus becomes identical to a channel matrix for causing the signal transmitted by said receiver apparatus to be related to said signal detected by said transmitter apparatus;
wherein,said transmitter apparatus comprises;
estimation means for estimating said channel matrix;
calculation means for calculating a physical amount so as to estimate a radio line quality with respect to each of signal series based upon only said channel matrix;
determination means for evaluating the radio line quality based upon the physical amount calculated by said calculation means so as to determine a transmission parameter in a next transmission operation with respect to each of signal series; and
means for controlling the transmission operation with respect to each of the signal series based upon the transmission parameter determined by said determination means; and
wherein,said receiver apparatus comprises;
means for detecting a change in said transmission parameter from the signals received from said transmitter apparatus with respect to each of signal series. - View Dependent Claims (24, 25, 26, 27)
- and a receiver apparatus for receiving said transmission signals by a plurality of receiver antennas, a channel matrix for causing the signal transmitted by said transmitter apparatus to be related to said signal detected by said receiver apparatus becomes identical to a channel matrix for causing the signal transmitted by said receiver apparatus to be related to said signal detected by said transmitter apparatus;
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28. (canceled)
Specification