摘要:
A multiband antenna includes a dielectric material (111) and patches (113,114). The patches are formed on the dielectric material, and a slot (115) is formed between two adjacent patches. The number of slots is determined corresponding to the number of frequency bandwidths output by the multiband antenna.
摘要:
A power consumption reducing device of a gap filler system includes a main module and a plurality of unit modules. The unit modules receive a signal from a terminal and determine whether the terminal is provided in beam coverage. The main module controls at least one unit module, one of which is a first unit module with beam coverage in which a terminal is provided from among a plurality of unit modules, to be turned on, and controls unit modules other than the turned-on unit module to be turned off.
摘要:
A transmitter receives feedback information from a receiver, and estimates a channel environment of a radio channel on the basis of the feedback information. Then, the transmitter generates a frequency multiplexing signal by use of a modulation method according to the channel environment, and transmits the generated frequency multiplexing signal. In this way, it is possible to cancel inter-carrier interference.
摘要:
The present invention separates inputted triple play IP data into Internet and TV data and voice (VoIP) data, encodes the Internet and TV data permitting a long delay time according to the existing DVB-S2 standard, and encodes the voice data permitting only a short delay time according to a DVB-RCS + M standard based 4K mode. Each encoded data is subjected to the orthogonal modulation and the orthogonally modulated voice data is subjected to a direct sequence spectrum spread according to a spreading factor. The spread spectrum signal is multiplexed in a SCPC frequency division multiple access (FDMA) scheme so as to overlap with frequencies allocated to each user.
摘要:
A transmitter receives feedback information from a receiver, and estimates a channel environment of a radio channel on the basis of the feedback information. Then, the transmitter generates a frequency multiplexing signal by use of a modulation method according to the channel environment, and transmits the generated frequency multiplexing signal. In this way, it is possible to cancel inter-carrier interference.
摘要:
A mobile satellite transmission/reception apparatus and a communications route control method using the same are disclosed. The mobile satellite transmission/reception apparatus comprises : a first antenna unit configured to receive a signal along a first communications route; a second antenna unit configured to receive a signal along a second communications route; and a data processor configured to compare cyclic redundancy check (CRC) values with respect to packet streams of signals respectively received by the first and second antenna units, and change communications route to one of the first and second communications routes if packets having the same CRC value are detected.
摘要:
A decoding method of an MPE-FEC (Multiprotocol Encapsulation-Forward Error Correction) US (Reed-Solomon) decoder, includes: substituting a value corresponding to an erasure error position with 0 in a reception signal; calculating a syndrome by using the reception signal; calculating an erasure position polynomial by using erasure information; calculating a modified syndrome by using the syndrome and the erasure position polynomial; calculating an erasure error size polynomial by using the modified syndrome; calculating an error position by using the erasure position polynomial; calculating an error size by using a modified Forney's algorithm; and correcting an error through the error position and the error size.
摘要:
A power consumption reducing device of a gap filler system includes a main module and a plurality of unit modules. The unit modules receive a signal from a terminal and determine whether the terminal is provided in beam coverage. The main module controls at least one unit module, one of which is a first unit module with beam coverage in which a terminal is provided from among a plurality of unit modules, to be turned on, and controls unit modules other than the turned-on unit module to be turned off.
摘要:
Provided are a bidirectional gap filler apparatus for receiving broadcasting signals and relaying communication signals and a method of transmitting the signals. According to the present invention, the bidirectional gap filler receives broadcasting signals and downlink communication signals, transmits the signals again as wireless signals, and receives wireless signals to transmit uplink communication signals. Here, directional antennas installed to respectively have fixed directivities and repeating units respectively connected to the directional antennas are used. Accordingly, excellent communication and transmission/reception of the broadcasting signals are available even in a RF signal shaded area.
摘要:
A mobile satellite transmission/reception apparatus and a communications route control method using the same are disclosed. The mobile satellite transmission/reception apparatus comprises : a first antenna unit configured to receive a signal along a first communications route; a second antenna unit configured to receive a signal along a second communications route; and a data processor configured to compare cyclic redundancy check (CRC) values with respect to packet streams of signals respectively received by the first and second antenna units, and change communications route to one of the first and second communications routes if packets having the same CRC value are detected.