Space frequency block code signal processing and relaying system

A space frequency block code signal receiving system, the receiving system comprising:

• a receiver configured to receive, via a radio channel, a source signal sent from a source station and a relay signal sent from a relaying system in a second time period, and detect the received signals, the source signal and the relay signal being signals encoded in a Space Frequency Block Code (SFBC) scheme;
• a Fourier transformer configured to perform a Discrete Fourier Transform (DFT) with respect to the received signal to generate a frequency domain signal;
• and
• a spectrum estimation processor configured to estimate a spectrum of the source signal in a frequency domain based on the frequency domain signal,
• wherein the source signal sent from the source station is transmitted directly from the source station to the receiving system in the second time period without using the relaying system,
• wherein the relay signal is generated in a first time period equal to a sum of a result of a conjugate value and a result of a time shift operation and a convolution operation on the received source signal of a time domain at the relaying system, and
• wherein the receiving system does not detect the source signal sent from the source station in the first time period.

A space frequency block code signal relaying method of a relaying system, the relaying method comprising:

• receiving at the relaying system, via a radio channel, a first source signal sent from a source station, and detecting the received signal in a first time period;
• generating a relay signal, in the first time period, corresponding with a second source signal transmitted from the source station to a destination node based on the received first source signal, the first source signal and the relay signal being signals encoded in a Space Frequency Block Code (SFBC) scheme;
• and
• transmitting the relay signal to the destination node in a second time period,
• wherein the second source signal transmitted from the source station to the destination station is transmitted directly from the source station to the destination in the second time period without using the relaying system,
• wherein the relay signal is generated in the first time period equal to a sum of a result of a conjugate value and a result of a time shift operation and a convolution operation on the received first source signal of the time domain, and
• wherein the destination node does not detect the first source signal in the first time period.

A space frequency block code signal receiving method, the receiving method comprising:

• receiving, via a radio channel, a source signal sent from a source station and a relay signal sent from a relaying system in a second time period, and detecting the received signals, the source signal and the relay signal being signals encoded in a Space Frequency Block Code (SFBC) scheme;
• and
• performing a Discrete Fourier Transform (DFT) with respect to the received signal to generate a frequency domain signal;
• and
• estimating a spectrum of the source signal in a frequency domain based on the frequency domain signal,
• wherein the source signal sent from the source station is transmitted directly from the source station in the second time period without using the relaying system,
• wherein the relay signal is generated in the first time period equal to a sum of a result of a conjugate value and a result of a time shift operation and a convolution operation on the received source signal of the time domain at the relaying system, and
• wherein the receiving system does not detect the source signal sent from the source station in the first time period.

A non-transitory computer-readable recording medium storing a program for implementing a space frequency block code signal relaying method of a relaying system, the relaying method comprising:

• receiving at the relaying system, via a radio channel, a first source signal sent from a source station, and detecting the received signal in a first time period;
• generating a relay signal, in the first time period, corresponding with a second source signal transmitted from the source station to a destination node based on the received first source signal, the first source signal and the relay signal being signals encoded in a Space Frequency Block Code (SFBC) scheme;
• and
• transmitting the relay signal to the destination node in a second time period,
• wherein the second source signal transmitted from the source station to the destination node is transmitted directly from the source station to the destination node in the second time period without using the relaying system,
• wherein the relay signal is generated in the first time period equal to a sum of a result of a conjugate value and a result of a time shift operation and a convolution operation on the received first source signal of the time domain, and
• wherein the destination node does not detect the first source signal in the first time period.