Optimal LTE-Protected LPDA Design for DVB-T Reception Using Particle Swarm Optimization With Velocity Mutation

Abstract

A near-optimal design of a log-periodic dipole array (LPDA), suitable for DVB-T reception (470-790 MHz), is presented. The LPDA is required to provide low standing wave ratio as well as high-gain radiation pattern with sufficient gain flatness over the entire passband, and concurrently achieve low gain for frequencies above 800 MHz to reject LTE800 signals and thus improve the reception quality in the DVB-T band. All the above requirements are better satisfied by applying a novel particle swarm optimization (PSO) variant, called PSO with velocity mutation (PSOvm). PSOvm induces mutation on the velocities of those particles, which are unable to improve their fitness. As shown in this paper, PSOvm comes closer to the above requirements compared to four well-known optimization methods and outperforms the traditional LPDA design method proposed by Carrel. The LPDA geometry chosen for optimization is not the conventional one and therefore the dipoles are not considered to be included inside a specified angle as proposed by Carrel. Thus, the dipole lengths and distances as well as the boom dimensions are independently optimized. The PSOvm-based LPDA sufficiently meets all the above requirements and thus is suitable for DVB-T reception without the use of an external LTE-band rejection filter.

Accurate antenna gain estimation using the two-antenna method

“…1. Another variant of LPDA has also been proposed in [18] using Particle Swarm Optimization with velocity mutation algorithm (PSOvm). However, this antenna was further optimized using the Trusted Region Framework (TRF) algorithm [19] in CST Studio Suite and described in [20].…”

Optimal Synthesis of Feeding Network for Implementation of Dolph–Chebyshev Current Distribution on Microstrip Antenna Arrays

“…Several PSO variants proposed so far have significantly improved the original algorithm. The idea of this particular variant (PSOvm) [17], [18] is to apply perturbation to the velocities of the particles that did not improve their fitness value in the previous iteration. Thus, it is expected that, by doing so, the swarm is protected from being trapped around a local optimum position and premature convergence is avoided.…”

“…Thus, a perturbation is applied to the velocity that the inactive particle had in the previous iteration, which actually did not lead to a better fitness. PSOvm has been proven to be competitive against other well-known evolutionary methods [17], [18] and can effectively handle multiple-variable non-linear optimization problems, as is this case.…”

“…To optimize MAA (phase 1) or the MFN (phase 2), we employ a particle swarm optimization (PSO) variant, called PSOvm [17], [18] which induces mutation to the particles' velocities that did not improve their fitness in the previous iteration. The idea behind this method is to decouple from its previous velocity every particle that did not manage to improve its fitness (inactive particle).…”

A novel design of a 10-dipole log-periodic antenna with LTE-800 and GSM-900 band rejection

“…Recently and in order to mitigate problems of interference caused due to the coexistence of the LTE 800 MHz band with the traditional UHF-TV band used by most TV tuners, various TV reception antennas have been designed, which can operate in the new TV band of 470 MHz -790 MHz while rejecting the 800 MHz band with the inclusion of external band stop filters. An optimal design of LPDA has been proposed in [10], which was obtained after optimizing Carrel's model using Particle Swarm Optimization with Velocity Mutation algorithm (PSOvm). The model provides rejection in the 800 MHz band, however, the relatively low VSWR of the antenna in the LTEband still leaves the possibility of receiving interference from other angles.…”