US 2011/0299609 A1 · TRANSMISSION METHOD, RECEPTION METHOD, AND COMMUNICATION METHOD

Abstract

A transmission method according to the present invention has been conceived assuming an environment where two information source nodes independently communicate with one destination node, and thus is applicable to such a simple topology. The transmission method provides an inter-node cooperation relationship which provides a sufficient advantageous effect even in an environment in which there is a difference in the power levels of the received signals that reach the address node via two routes. The transmission method is performed by a node U1 (40) and a node U2 that is located closer to the node D (60) than the node U1 (40) to transmit signals to a node D (60) which iteratively detects a log likelihood ratio between mutually corresponding pairs of bits included in the signals at constellation points. According to the transmission method, the node U1 (40) modulates the first bit sequence to generate a first signal and transmits the generated first signal, and the node U2 (50) receives the first signal, performing logical operation on the second bit sequence and the first bit sequence included in the received first signal to generate a third bit sequence, modulates the generated third bit sequence to generate a second signal, and transmits the generated second signal.

Claims7

Dependent claims

A transmission method performed by a first transmission device and a second transmission device to transmit signals to a reception device which iteratively detects a log likelihood ratio in units of a pair of bits included in the respective signals at constellation points, the second transmission device being located closer to the reception device than the first transmission device, and said transmission method comprising:

generating a first signal by modulating a first bit sequence, and transmitting the generated first signal to the second transmission device and the reception device, said generating and transmitting being performed by the first transmission device;
receiving the first signal, and extracting the first bit sequence included in the received first signal, said receiving and extracting being performed by the second transmission device;
generating a third bit sequence by performing, in units of a pair of bits, logical operation on the first bit sequence extracted in said receiving and extracting and a second bit sequence, said generating being performed by the second transmission device;
and
generating a second signal by modulating the third bit sequence, and transmitting the generated second signal to the reception device, said generating and transmitting being performed by the second transmission device.

2 more elements

A communication method performed by a plurality of communication devices to transmit and receive signals, said communication method comprising:

generating a first signal by modulating a first bit sequence, and transmitting the generated first signal, said generating and transmitting being performed by a first transmission device that is one of the plurality of communication devices;
receiving the first signal, and extracting the first bit sequence included in the received first signal, said receiving and extracting being performed by a second transmission device that is one of the plurality of communication devices;
generating a third bit sequence by performing, in units of a pair of bits, logical operation on the first bit sequence extracted in said receiving and extracting and a second bit sequence, said generating being performed by the second transmission device;
generating a second signal by modulating the third bit sequence, and transmitting the generated second signal, said generating and transmitting being performed by the second transmission device;
receiving a third signal that is a signal generated from the first signal when the first signal attenuated during propagation, and demodulating the received third signal, said receiving and demodulating being performed by a reception device that is one of the plurality of communication devices;
receiving the second signal, and demodulating the received second signal, said receiving and demodulating being performed by the reception device;
and
extracting the first bit sequence and the second bit sequence by iteratively calculating, in units of a pair of bits, reliability information indicating reliability of each pair of bits, using the third signal demodulated in said receiving and demodulating of the third signal and the second signal demodulated in said receiving and demodulating of the second signal,
wherein the second transmission device is located closer to the reception device than the first transmission device.

6 more elements

Dependencies are inferred from the claim text.

Transmission method, reception method, and communication method

Life of this patent

Transmission method, reception method, and communication method

Life of this patent

Abstract

Claims7