Signal transmitting and processing method for diversity gain in relay interference channel
A technology of signal transmission and diversity gain, applied in the field of communication, can solve the problems of reducing system capacity, not obtaining diversity gain, reducing system degree of freedom, etc., to achieve the effect of increasing system capacity, increasing degree of freedom, and increasing diversity gain
Active Publication Date: 2014-09-24
XIDIAN UNIV
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Problems solved by technology
Interference alignment technology is an effective method for interference management in interference channels. When there are many system users, it can significantly improve the degree of freedom of the system and increase the system capacity, but it does not obtain diversity gain to improve system reliability; Gain diversity gain, improve system reliability, but reduce the degree of freedom of the system and reduce the system capacity
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[0025] The embodiments and effects of the present invention will be described in further detail below with reference to the accompanying drawings.
[0026] refer to figure 1 , the communication system used in the present invention is divided into three parts: a transmitting end, a relaying end and a receiving end. Each user transmitting end sends out the Alamouti space-time code signal through three time slots, and uses the interference alignment method at the relaying end to align the received signal. The signal is processed, and finally the interference signal is eliminated at the receiving end to obtain the desired signal.
[0027] refer to figure 2 , the present invention performs the steps of signal transmission processing in the above-mentioned communication system as follows:
[0028] Step 1, the transmitting end of each user sends each Alamouti space-time code signal to the receiving end through three time slots.
[0029] 1a) In the first time slot of signal transm...
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The invention discloses a signal transmitting and processing method for diversity gain in a relay interference channel. The method mainly solves the problem that system reliability or system capacity can not be simultaneously improved in the prior art. According to the implementing scheme, the method includes the steps that (1) each user sending terminal sends an Alamouti space time code signal through three time slots; (2) a relay terminal performs conversion on the received signals by using an interference aligning method; (3) the processed signals are sent to a receiving terminal through a direct link and a relay link; (4) the receiving terminal merges and processes the signals received through the three time slots to obtain equivalent received signals, and finally interference signals are removed to obtain expectation signals. The method is easy and convenient to implement, reuse gain and diversity gain can be simultaneously obtained in the system, the system reliability and the system capacity are improved, and the method can be used for a multi-user wireless communication system with a relay.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to wireless relay communication, in particular to a method combining Alamouti space-time code and interference alignment technology proposed for a multi-user multiple-input-output MIMO relay interference channel, which can be used for in a multi-user wireless communication system. Background technique [0002] Interference is an important factor restricting the development of modern wireless communication technology, so the related research in multi-user interference channel has become an important direction of modern communication development research. The degree of freedom represents the relationship between the system rate and the logarithm of the signal-to-noise ratio, and it also represents the maximum number of non-interfering data streams that the system can transmit. efficient method of capacity. [0003] The traditional method of suppressing interference includes deco...
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IPC IPC(8): H04L1/06H04L25/03H04B7/04H04B7/06
Inventor 刘祖军吴立新孙德春田斌王杰令孙永军
Owner XIDIAN UNIV