Determination of the diagram of the linear lattice direction with a multi-stage adaptive compensator interference
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2018, Vol 0, Issue 74
Abstract
Introduction. Adaptive compensation algorithms of interference in digital antenna array (DAA) are characterized by high computational complexity. As result, it makes it difficult to implement them in real time. A parallelization of computational processes and simultaneous processing in all parallel channels is one of the main directions of increasing the speed of processing. The approach based on block Gram-Schmidt orthogonalization makes it possible to synthesize multistage adaptive compensators of interference with parallel-sequential signal processing that similar to the architecture of multiprocessor computer systems. The signal processing in DAA based on multistage adaptive compensator of interference is more complex than in single-stage ones. Each stage has own set of weight coefficients. As result, a technique for calculating radiation pattern (RP) of a linear DAA with a multistage adaptive compensator of interference and certain architecture and parameters is required. Theoretical results. The block diagram of the adaptive compensator of interference by using block signal orthogonalization of compensation channels and consistent determination of the compensation error has a ladder form and includes some stages. Each stage consists groups of modules. Each module in the group is a multi-input weight adder. The complex signal envelope from the DAA output applies to the main channel of an adaptive compensator of interference. The technique for calculating RP of DAA with a multistage adaptive compensator of interference by using block orthogonalization of compensation channels signals includes the following steps: 1. Forming of the matrix impulse characteristics for the adaptive compensator of interference stages. 2. Calculation of the matrix impulse response for a multistage filter realizing an interference compensation procedure based on its factorized representation. 3. Determination of the weight coefficients of an equivalent single-stage adaptive compensator of interference in the form of multi-input weighted adder. 4. Calculation of the RP of DAA with an equivalent single-stage adaptive compensator of interference. Experimental results. RP analysis based on the proposed technique is carried out for six-element linear DAA with one-, two-, three- and six-stage adaptive compensators of interference and three jammers. The analysis confirms that considered adaptive compensators of interference have the same effectiveness of interference elimination. In the same time, they are characterized by the same accuracy of "zeros" formation on interference sources and the width of rejection zone for different values of correlation matrix conditioning of the interference. Conclusions. We propose the technique for calculating the RP of DAA with multi-stage adaptive compensator of interference by using the factorized representation of the matrix impulse response of a multistage filter. This compensator is based on block signals orthogonalization of compensating channels and provides parallel-sequence signal processing.
Authors and Affiliations
K. Semibalamut, S. Khamula
Keywords
Related Articles
- EP ID EP392092
- DOI 10.20535/RADAP.2018.74.17-24
- Views 73
- Downloads 0
Modeling and rapid method measurement diagram RCS horn antennas
Introduction. The development of new technology and reliable operation of radio systems requires knowledge of the scattering of radio waves by radar targets. For solids of complicated form there is no sufficiently accura...
Method of analogue signal sampling on the basis of lowering dimension non-expansive compact uniformly continuous mapping
The work purpose is creation of the method for analogue signal digitization on the basis of lowering dimension non-expansive compact uniformly continuous mapping operating in compact metric spaces for computer systems of...
Theory of microstrip circular antenna
The paper discusses the methodology of calculation of circular microstrip antenna. The antenna itself has been presented as a cylindrical resonator electrically small height. The mathematical description of the electroma...
The usage of regress model coefficient utilization of channels for creating the load distribution plan in network
Introduction. Method of problem solutions of management, design and quality evaluation using mathematical models coefficient utilization of channels (CUC) in standard form has several inconveniences. It is connected with...
Application of correlation matrix for solving the task of authentification of person after the dinamically entered signature
The work of method with use of correlation matrix for solving the task of authentification of person after the dinamically entered signature is illustrated.