Comparison of different antenna arrays for the BER reduction in indoor wireless communication

Abstract

In this paper, we use the ultra wideband antenna array combined with particle swarm optimization (PSO) to minimize the BER for indoor communication systems. Three types of antenna arrays, namely the circular shape, L shape, and Y shape arrays, are used in the transmitter and their corresponding BER on several paths in the indoor environment are calculated. On the basis of the topography of the antenna array and the BER formula, the array pattern synthesis problem can be reformulated into an optimization problem and solved by the PSO. The novelties of our approach is not only choosing BER as the object function instead of the sidelobe level of the antenna pattern, but also considering the antenna feed length effect of each array element. The particle swarm optimization algorithm is employed to optimize the excitation voltages and feed lengths for these antenna arrays to reduce the BER. The strong point of the PSO is that it can find the solution even if the performance index cannot be formulated by simple equations. By the obtained antenna patterns, we can know the route with the lowest BER; meanwhile, transmission power using this route can be reduced. Numerical results show that the synthesized antenna array pattern is effective in focusing maximum gain to the line-of-sight path for these antenna arrays. The synthesized array pattern also can mitigate severe multipath fading in complex propagation environments. As a result, the BER can be reduced substantially in indoor ultra wideband communication systems. The investigated results can help communication engineers improve their planning and design of indoor wireless communication.

Location optimisation for antennas by asynchronous particle swarm optimisation

“…Using ray-tracing [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] approaches to predict channel characteristic is effective and fast, and the approaches are also usually applied to multiple input multiple output (MIMO) channel modelling in recent years [25][26][27][28]. Thus, a ray-tracing technique is developed to calculate the channel matrix of MIMO system in this paper.…”

Content‐based image retrieval over IEEE 802.11b noisy wireless networks

“…In such a ‘hostile’ environment, it is vital for a user to be able to use an application without having to deal with inaccuracies or doubts about the outcome of the particular task. A comparison of techniques for reducing BER in an indoor scenario can be found in .…”

“…In such a 'hostile' environment, it is vital for a user to be able to use an application without having to deal with inaccuracies or doubts about the outcome of the particular task. A comparison of techniques for reducing BER in an indoor scenario can be found in [2].In this paper, we will examine the case of transmitting data over an erroneous channel using the UDP (User Datagram Protocol) [3]. A user performing image retrieval using an application on their mobile device demands real-time response in terms of the results.…”

A dense overlapped linear subarray architecture for interference suppressing in small‐scale arrays

“…Owing to the merits such as lower interference [1,2], better spatial reuse, longer transmission range [3], and improved network capacity [4,5], the adaptive digital beamforming (ADBF) has been studied in various of areas. Radio interference suppressing ability is the key advantage of adaptive arrays, especially for the strong radio frequency interference in the same frequency band and has been applied extensively in global navigation satellite system (GNSS) receivers for the severe electromagnetic environment [6,7].…”