Receiver Apparatus and Transmitter Apparatus
1 Assignment
0 Petitions
Accused Products
Abstract
In a wireless communication system based on an OFDM technology, a control channel and a low-speed data channel can be multiplexed without a reduction in the transmission speed of a traffic channel. In a communication system that is operated by multiplexing a traffic channel for performing high-speed data transmission and a control channel for performing low-speed control information transmission, an OFDM signal for transmitting the traffic channel and an OFDM signal for transmitting a control signal are multiplexed for transmission. In a receiving station, the control channel is first demodulated/decoded and a judgment is made as to whether or not any signal addressed to the self station is contained in a traffic channel signal. When any signal addressed to the self station is contained, the control channel signal is cancelled from the reception signal in accordance with a wireless channel quality and the traffic channel is demodulated.
67 Citations
110 Claims
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1-57. -57. (canceled)
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58. A transmitter apparatus using orthogonal frequency division multiplexing (OFDM) modulation, the transmitter apparatus comprising:
- means for generating a traffic channel signal by performing OFDM modulation on traffic channel data;
means for generating a control channel signal from control channel data by using a signal that is not orthogonal in any of time, frequency, and code relative to the traffic channel signal; and
means for generating a transmission signal by multiplexing the traffic channel signal and the control channel signal. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65)
- means for generating a traffic channel signal by performing OFDM modulation on traffic channel data;
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66. A transmitter apparatus using orthogonal frequency division multiplexing (OFDM) modulation, the transmitter apparatus comprising:
- means for generating a signal of a traffic channel 1 by performing OFDM modulation on data of the traffic channel 1;
means for generating a signal of a traffic channel 2 by using a signal that is not orthogonal in any of time, frequency, and code relative to the traffic-channel-1 signal; and
means for generating a transmission signal by multiplexing the traffic-channel-1 signal and the traffic-channel-2 signal. - View Dependent Claims (67, 68, 69, 70, 71, 72)
- means for generating a signal of a traffic channel 1 by performing OFDM modulation on data of the traffic channel 1;
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73. A transmitter apparatus using an orthogonal frequency division multiplexing (OFDM) technology and using a modulation scheme (OFCDM modulation) in which a signal subjected to OFDM modulation by using the OFDM technology is a signal spread over multiple subcarriers, multiple OFDM symbols, or both the domains, the transmitter apparatus comprising:
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traffic-channel-signal generating means for generating a traffic channel signal by performing OFCDM modulation on traffic channel data;
control-channel-signal generating means for generating a control channel signal from control channel data by using a signal that is not orthogonal in any of time, frequency, and code relative to the traffic channel signal; and
transmission-signal generating means for generating a transmission signal by multiplexing the traffic channel signal and the control channel signal. - View Dependent Claims (77, 79, 80, 82, 84, 86, 88)
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74. A transmitter apparatus using an orthogonal frequency division multiplexing (OFDM) technology and using a modulation scheme (OFCDM modulation) in which a signal subjected to OFDM modulation by using the OFDM technology is a signal spread over multiple subcarriers, over multiple OFDM symbols, or over both the domains, the transmitter apparatus comprising:
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traffic-channel-signal generating means for generating a traffic channel signal by performing OFCDM modulation on traffic channel data;
control-channel-signal generating means for generating a control channel signal by modulating control channel data by an arbitrary scheme;
switching means for switching between a non-orthogonal signal, with which the control channel signal and the traffic channel signal are not orthogonal to each other in any of time, frequency, and code, and an orthogonal signal, with which the control channel signal and the traffic channel signal are orthogonal to each other in any of time, frequency, and code; and
transmission-signal generating means for generating a transmission signal by multiplexing the traffic channel signal and the control channel signal. - View Dependent Claims (75, 76, 78, 81, 83, 85, 87, 89, 90, 91)
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92. A transmitter apparatus using an orthogonal frequency division multiplexing (OFDM) technology and using a modulation scheme (OFCDM modulation) in which a signal subjected to OFDM modulation by using the OFDM technology is a signal spread over multiple subcarriers, multiple OFDM symbols, or both the domains, the transmitter apparatus comprising:
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traffic-channel-signal-1 generating means for generating a traffic channel signal 1 by performing OFCDM modulation on traffic channel data 1;
traffic-channel-signal-2 generating means for generating a traffic channel signal 2 from traffic channel data 2 by using a signal that is not orthogonal in any of time, frequency, and code relative to the traffic channel signal 1, the traffic channel data 2 being low in speed compared to the traffic channel data 1; and
transmission-signal generating means for generating a transmission signal by multiplexing the traffic channel signal 1 and the traffic channel signal 2. - View Dependent Claims (96, 98, 99, 101, 103, 105, 107)
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93. A transmitter apparatus using an orthogonal frequency division multiplexing (OFDM) technology and using a modulation scheme (OFCDM modulation) in which a signal subjected to OFDM modulation by using the OFDM technology is a signal spread over multiple subcarriers, over multiple OFDM symbols, or over both the domains, the transmitter apparatus comprising:
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traffic-channel-signal-1 generating means for generating a traffic channel signal 1 by performing OFCDM modulation on traffic channel data 1;
traffic-channel-2 signal generating means for generating a signal of a traffic channel 2 by modulating traffic channel data 2 by an arbitrary scheme;
switching means for switching between a non-orthogonal signal, with which the traffic-channel-2 signal and the traffic-channel-1 signal are not orthogonal to each other in any of time, frequency, and code, and an orthogonal signal, with which the traffic-channel-2 signal and the traffic-channel-1 signal are orthogonal to each other in any of time, frequency, and code; and
transmission-signal generating means for generating a transmission signal by multiplexing the traffic channel signal 1 and the traffic channel signal 2. - View Dependent Claims (94, 95, 97, 100, 102, 104, 106, 108, 109, 110)
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Specification