Method of adjusting timing transmission parameters in a single frequency network

摘要

A method of adjusting the transmission station parameters in a digital video broadcasting network, includes determining, in at least one area element of a geographic area of interest, delays among signals received from a plurality of transmission stations; calculating, based on the determined delays, transmission delays to be applied to the transmission stations of the plurality, wherein the calculated transmission delays are adapted to reduce the delays among the received signals; and applying the calculated transmission delays to the transmission stations of the plurality. The choice of the timing parameters is based on a repetition of a random perturbation of a control parameter and the consequent evaluation of the result of the result obtained.

主权项

1. A method of planning a single frequency digital broadcasting network comprising at least one elevated transmission station and a plurality of low-height transmission stations, the method performed by a computer system comprising a processor and a memory encoded with program instructions that, when executed by the computer system, cause the computer system to perform the method, comprising:
subdividing a geographic area of interest into a plurality of area elements; simulating, using the processor, a distribution of the electromagnetic field originating from the transmission stations in every one of said area elements; in at least one area element of the geographic area of interest, calculating, using the processor, delays among signals received from the transmission stations based on the simulated electromagnetic field distribution; and based on said calculated delays, calculating, using the processor, transmission delays to be deliberately applied to the low-height transmission stations of said plurality, wherein said calculated transmission delays are adapted to reduce delays of the signals coming to the at least one area element from the elevated transmission station with respect to the signals coming from the low-height transmission stations; and applying said calculated transmission delays to the signals transmitted by the transmission stations of said plurality, wherein said calculating transmission delays comprises:
forming a first set of transmission delays,inserting the first set of transmission delays in a solution list,performing a refinement, using the processor, by varying randomly the set of the transmission delays, andupdating the solution list.