| 摘要 |
<p>A method of transmission of communications from a transponder to an interrogator consists in dividing into "n" bits the information about the transponder which is to be included into an answer signal and including that information by bits into the answer signal after which the answer signal is emitted as "n" consecutive sendings, every next sending being emitted only after the receipt of confirmation from the interrogator that the preceding sending has been stored. A secondary radar system comprises in the interrogator the following elements connected in series: a coder (1) of the starting group of the interrogation signal, a transmitter (3) of the interrogation signal, a decoupling device (4) and a transceiving aerial (5), as well as, connected in series, a receiver (6) of the answer signal connected by its input to the second output of the decoupling device (4), a target selector (7), a storage block (8) and an information displaying device (9). The system further comprises in the interrogator a decoder (10) of general identification connected to the output of the receiver (6) of the answer signal and further comprises in the transponder the following elements connected in series: a transceiving aerial (17), a decoupling device (18), a receiver (19) of the interrogation signal, a decoder (20) of the starting group of the interrogation signal, an informant (21) of general identification and a transmitter (22) of the answer signal connected by its output to the second input of the decoupling device and by its second input - to the output of an informant (25) of communications which is connected by its input, through a storage block (24), to the output of the receiver (19) of the interrogation signal. The system further comprises in the interrogator a coder (2) of the read-out commands with "n" control inputs, a command unit with "n" outputs, a storage block (24) with "n" address inputs and further comprises in the transponder, a decoder (23) of the commands for read-out of bits with "n" outputs, the storage block (24) with "n" address inputs, each of them being connected to one of the "n" outputs of the decoder (23) of the read-out commands. </p> |
