SU788403A1

SU788403A1 - Device for combined spaced signals

Info

Publication number: SU788403A1
Application number: SU782691879A
Authority: SU
Inventors: Петр Алексеевич Полушин; Александр Георгиевич Самойлов; Станислав Петрович Тараканков
Original assignee: Владимирский политехнический институт
Priority date: 1978-12-01
Filing date: 1978-12-01
Publication date: 1980-12-15

Description

(54) УСТРОЙСТВО КОМБИНИРОВАНИЯ РАЗНЕСЕННЫХ СИГНАЛОВ(54) DEVICE FOR COMBINING DIFFERENT SIGNALS

1one

Изобретение относитс к радиотехнике и может использоватьс в системах св зи с разнесением, в частности в системах дальней тропосферной св зи.The invention relates to radio engineering and can be used in communication systems with diversity, in particular in systems of the far tropospheric communication.

Известно устройство комбинировани разнесенных сигналов, содержащее в каждой ветви разнесени линейные тракты, выходы которых через последовательно соединенные блоки ограничени и частотного детектировани , блоки управлени подключены ко входам сумматора, блок сравнени , входы которого подключены к выходам линейных трактов, а выходы - ко вторым входам блоков управлени 1.A device for combining separated signals is known, which contains linear paths in each branch, the outputs of which are connected through series-connected limiting and frequency detection units, control units connected to the inputs of the adder, a comparison unit whose inputs are connected to the outputs of the linear paths, and outputs to the second inputs of blocks management 1.

Однако известное устройство не обеспечивает достаточной помехоустойчивости св зи.However, the known device does not provide sufficient noise immunity of communication.

Цель изобретени - повышение помехоустойчивости св зи.The purpose of the invention is to improve the noise immunity of communication.

Дл достижени этой цели в известное устройство ком&иннровани разнесенных сигналов введены в каждую ветвь первый полосовой фильтр, второй полосовой фильтр, коммутатор и амплитудный детектор, при этом входы параллельно соединенных первого и второго полосовых фильтров подключены к выходам линейных трактов в кажДОИ ветви и выходы первого и второго полосовых фильтров подключены к первому и второму входам коммутатора, третий вход которого подсоединен к выходу блока ограничени и частотного детектировани , а выход коммутатора через амплитудный детектор подключен ко входу блока управлени .To achieve this goal, in a known device, a split & spreading signals are inserted into each branch of the first bandpass filter, second bandpass filter, switch and amplitude detector, while the inputs of the first and second bandpass filters connected in parallel to the outputs of the linear paths in each branch and the outputs of the first and the second bandpass filters are connected to the first and second inputs of the switch, the third input of which is connected to the output of the limiting and frequency detection unit, and the switch output via a An mplite detector is connected to the input of the control unit.

На чертеже представлена структурна электрическа схема предложенного устройства .The drawing shows a structural electrical circuit of the proposed device.

Устройство комбинировани разнесенных The device combining spaced

10 сигналов содержит в каждой ветви 1, 2 разнесени линейный тракт 3, блок 4 ограничени и частотного детектировани , блок 5 управлени , первый и второй полосовые фильтры 6, 7, коммутатор 8 и амплитудный детектор 9, кроме того, устройство содер15 жит блок 10 сравнени и сумматор 11.10 signals in each branch 1, 2 of the separation linear path 3, block 4 limiting and frequency detection, control block 5, the first and second band-pass filters 6, 7, switch 8 and amplitude detector 9, in addition, the device contains block 10 comparison and adder 11.

Устройство работает следующим образом .The device works as follows.

Claims

Comparison unit 10 compares the amplitudes of the input signals and, with the help of control units 5, provides crescent coefficients proportional to the amplitudes of the input signals. The first and second bandpass filters 6, 7, switches 8 and amplitude detectors 9 produce a signal proportional to the power of additive noise in the input signal band, on the basis of which control units 5 provide coefficients inversely proportional to the power of additive noise in the x branch. The use of band-pass filters 6 and / or switch 8 and amplitude detector 9 in each branch of the diversity allows for optimal coding coefficients when adding diversity signals inversely proportional to the power of additive amplitudes in branch x 1, 2, and the power of additive noise is determined directly in the signal band without allocating special noise channels in the transmitted message. A diversity signal combiner allows an increase in the noise immunity of the far tropospheric radio communication. Claims An exploded signal combinator comprising linear paths in each branch, the outputs of which are connected through series-connected limiting and frequency detection units, control units connected to the inputs of the adder, a comparison unit whose inputs are connected to the outputs of the linear paths, and outputs to the second inputs Control units, characterized in that, in order to improve the noise immunity of the communication, a second flat filter, a second band-pass filter, a switch and An amplitude detector, wherein the inputs of parallel-connected first and second band-pass filters are connected to the outputs of the linear paths in each branch and the outputs of the first and second band-pass filters are connected to the first and second inputs of the switch, the third input of which is connected to the output of the limiting and frequency detection unit, and the output the switch is connected via an amplitude detector to the input of the control unit. Sources of information taken into account in the examination 1. I. I. Gutsinsky and others. Far-tropospheric communication. M., “Holy, 1968, p. 74, fig. 24, a.