Improved MAX-SINR interference alignment method in multi-user multi-antenna SWIPT
A MAX-SINR, multi-user multi-antenna technology, applied in radio transmission systems, transmission systems, energy reduction and other directions, can solve problems such as system spectral efficiency improvement, inter-user interference, interference with wireless communication performance, etc., and achieve interference-constrained power falling effect
Active Publication Date: 2021-04-23
HANGZHOU DIANZI UNIV
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Problems solved by technology
[0003] At present, with the substantial growth of wireless communication users, interference has become one of the main bottlenecks limiting the performance of current wireless communication
Especially in the multi-user multi-antenna MIMO communication system, the inter-user interference has severely limited the further improvement of the system spectral efficiency
Method used
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[0077] figure 1 It is a model diagram of multi-user multi-antenna SWIPT system. In the system, the sending end and the receiving end always appear in pairs, and the sending end sends useful information to the corresponding receiving end. At the same time, other transmitters in the system also send information to K receivers. For the corresponding receivers, except for the information sent by the designated transmitter, the rest are regarded as interference information. The sending end will precode before sending the information, and then the receiving end will align the remaining interference information to the corresponding subspace through the interference suppression matrix, and then the energy receiver will collect the aligned interference as energy to realize green communication .
[0078] figure 2 It is a relationship diagram of the system sum rate and the signal-to-noise ratio of the transmitting end when the antenna N=8 at the receiving end. It can be seen from th...
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The invention discloses an improved MAX-SINR interference alignment method in a multi-user multi-antenna SWIPT system. According to the method, an optimization model is established by taking maximization of the network sum rate of the SWIPT communication network as an optimization target, and the system performance meets the required requirements by performing joint optimization on a power division factor, a sending end precoding matrix and a receiving end interference suppression matrix. Researches show that the interference alignment performance compromise of minimizing the interference leakage power (MIN-IL) and maximizing the signal to interference plus noise ratio (MAX-SINR) can be realized by optimizing the interference suppression matrix of the receiving end again. The method provided by the invention can maximize the reachability and rate of the SWIPT network. Research shows that with the increase of the number of antennas at the receiving end, the reachable sum rate of the receiving end of the method is obviously improved compared with that of a MINIL method; compared with an MAXSINR method, the interference constraint power of the method is greatly reduced.
Description
technical field [0001] The invention belongs to the technical field of information and communication engineering, and proposes an improved Maximize Signal to Interference and Noise Ratio (SINR) in a multi-user multi-antenna wireless portable communication (Simultaneous Wireless Information and Power Transfer, SWIPT) system. , MAX-SINR) Interference Alignment (Interference Alignment, IA) method to eliminate interference to maximize the spectral efficiency of the system. Background technique [0002] At present, most mobile terminal devices are energy-constrained, and the energy is non-renewable or energy-inefficient, so energy consumption has become one of the hotspots of researchers. In recent years, researchers have noticed that radio frequency (RF) signals can not only carry information, but also carry energy as electromagnetic waves. While inductive coupling and resonant coupling both require calibration and alignment of the coil / resonator at the transmitter and receiver...
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Patent Timeline
Login to View More IPC IPC(8): H04B7/0413H04B7/0456H04B17/336H04B17/382H04B17/391
CPCH04B7/0413H04B7/0456H04B17/336H04B17/382H04B17/391Y02D30/70
Inventor 许晓荣王玉军赵彬
Owner HANGZHOU DIANZI UNIV