ABSTRACT
Resumen En la detección de símbolos para sistemas MIMO con un gran número de antenas que se conoce como L-MIMO (Large MIMO), se busca contar con esquemas eficientes cuya complejidad haga viable su implementación real. Este artículo presenta los resultados obtenidos con un esquema basado en Tabu Search, comparándolo mediante simulación con detectores lineales de referencia, demostrando que, en condiciones normales de un canal inalámbrico, es posible obtener un mejor desempeño en las evaluaciones que se realizan hasta L -MIMO. 32x32.
Abstract In the detection of symbols for MIMO systems with a large number of antennas which is known as L-MIMO (Large MIMO), it is sought to have efficient schemes whose complexity makes viable its real implementation. This article presents the results obtained with a Tabu Search based scheme, comparing it by means of simulation with reference linear detectors, demonstrating that in normal conditions of a wireless channel, it is possible to obtain a better performance in evaluations that are made up to L-MIMO 32x32.
Resumo Na detecção de símbolos para sistemas MIMO com um grande número de antenas conhecidas como L-MIMO (MIMO grande), o objetivo é ter esquemas eficientes cuja complexidade torna sua implementação real viável. Este artigo apresenta os resultados obtidos com um esquema baseado em Tabu Search, comparando-o por simulação com detectores de referência linear demonstrando que, em condições normais de um canal sem fio, é possível obter um melhor desempenho nas avaliações que são feitas para L -MIMO 32x32.
ABSTRACT
Objective To design a wireless transmission solution of multi-parameter vital signs signal which can be applied in psychological status assessment.Methods C8051F350 SOC was used to define data frame structure,on application level,including channel number,control words,data and so on,which put all nodes data into the upper computer cache area by channel in an orderly way.A transfer rate of five seconds on a grid,each grid at least 48 groups of data was chosen in buffer,which could not only match the dynamic PC image display,but also to achieve the stability of the channel signal acquisition and orderly transfer.Results After operating test,with the communication distance within 10～15 m,the dynamical display of the upper computer showed a smooth curve data,which met the system design requirement.After optimization of the data frame,the transmission power could be reduced to 1/12 of that of normal mode.The whole system with three advantages of small size,low power and easy to carry.Conclusion Multi-parameter wireless acquisition system described in this paper eliminates the data line connected to the subjects,which does not affect their normal activities and is conducive to the real response of subjects' mental state,and provides a reliable means of detection for psychological assessment.