Abstract
The article describes and theoretically substantiates the potential technical capabilities of spatially separated earth stations (ES). When several ESs emit in-phase or mutually pairwise correlated signals in the direction of one received antenna of the object, the total level of the sum of emissions at its output (at the input of the receiving path) may be several times higher than the sum of the powers of these signals. In this regard, the article investigates the influence of the phase difference of the transmitted signals on the value of their total average power at the input of the receiving path. In the case of addition of common-mode signals, a formula is used to calculate in which the power of harmonic radiation is proportional to the square of the sum of the amplitude of the common-mode signals. This paradox is also valid for pairwise cross-correlated signals. The presented technique for evaluatingтthe effectivenessтallows one to establish not only the dependence of the energy ratios on the nonтenergy parameter, but also to determine the number of low-power ESs required to ensureтthe required signal level at the input of the receiving device. The use of the presented technique makes it possible to evaluate the efficiency of receiving a combined high-power signal for a differentтnumber of emitters that form in-phase or pairwise mutual correlation of signals at the receiving point.
Highlights
Введение Одним из требований, предъявляемых к информационным радиотехническим системам, является устойчивость к воздействию помех различного характера
The article investigates the influence of the phase difference of the transmitted signals on the value of their total average power at the input of the receiving path
In the case of addition of common-mode signals, a formula is used to calculate in which the power of harmonic radiation is proportional to the square of the sum of the amplitude of the common-mode signals
Summary
С. Методика оценивания эффективности приема взаимно коррелированных или синфазных сигналов при разнесенной передаче // Вопросы радиоэлектроники. При излучении несколькими ЗС синфазных или взаимно попарно коррелированных сигналов в направлении одной принимаемой антенны объекта общий уровень суммы излучений на ее выходе (на входе приемного тракта) в несколько раз может превышать сумму мощностей этих сигналов. Суммарная мощность сигналов при этом растет, увеличивая соотношение сигнал-шум на входе приемного тракта радиоэлектронного средства (РЭС) [3–5]. Цель настоящей статьи – обоснование возможности повышения энергетических характеристик излучающих средств (земных станций) при разнесенной передаче сигналов с обеспечением их синфазности или попарной взаимной коррелированности в точке приема. Если рассматриваемая модель представляет собой систему, состоящую из одной ЗС, излучающей гармонический сигнал мощностью Pc, то мощность сигнала на выходе приемной антенны РЭС Pвых будет вычисляться по формуле.
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