Abstract:
A transmitter and transmission method for broadcasting data. To enable a receiver, such as a moving receiver, to improve decoding quality, if needed, a transmitter includes: a data input receiving at least one transmitter input data stream segmented into input data words; an encoder error correction code encoding the input data words into codewords including a basic codeword portion and an auxiliary codeword portion, the encoder generating the basic codeword portion from an input data word according to a first code and generating the auxiliary codeword portion from an input data word according to a second code, the basic codeword portion for regular decoding and the auxiliary codeword portion for incremental redundancy if regular decoding of the codeword by using the basic codeword portion is erroneous; a data mapper mapping the codewords onto frames of a transmitter output data stream; and a transmitter transmitting the transmitter output data stream.
Abstract:
A method of transmitting data in an optical transport network is provided. The method comprises generating an optical transmission unit frame including an in-band area including a first area to which information data is allocated and a second area to which the information data is not allocated and an out-band area including parity information and transmitting the data through the optical transmission unit frame.
Abstract:
A transmitter for broadcasting data in a broadcasting system that improves the decoding quality, if needed, comprises a data input, and an encoder for error correction code encoding the input data words into codewords, a codeword comprising a basic codeword portion and an auxiliary codeword portion, wherein said encoder is adapted for generating said basic codeword portion from an input data word according to a first code and for generating said auxiliary codeword portion from an input data word according to a second code, said basic codeword portion being provided for regular decoding and said auxiliary codeword portion being provided as incremental redundancy if regular decoding of the codeword by use of the basic codeword portion is erroneous. Further, the transmitter comprises a data mapper for mapping the codewords onto frames of a transmitter output data stream, and a transmitter unit for transmitting said transmitter output data stream.
Abstract:
A wireless communication device which includes: a sensing antenna for sensing communication by a primary user; a first transmission antenna; a second transmission antenna; first transmitting unit that generates a transmission signal to be transmitted from the first transmission antenna; second transmitting unit that generates a transmission signal to be transmitted from the second transmission antenna and that cancels, in the sensing antenna, a transmission signal from the first transmission antenna; digital signal processing unit that suppresses the transmission signal from the first transmission antenna, from a received signal of the sensing antenna; and sensing unit that detects communication by a primary user on the basis of the received signal of the sensing antenna that has been processed by the digital signal processing unit. While performing communication as a secondary user, the device detects communication by a primary user. Hence, constant sensing is enabled in a cognitive radio communication device.
Abstract:
Techniques for transmitting traffic data and control information in a wireless communication system are described. In an aspect, traffic data and control information may be multiplexed at a coded data level. A user equipment (UE) may encode traffic data to obtain coded traffic data, encode control information to obtain coded control data, multiplex the coded traffic data and the coded control data, modulate the multiplexed data, and generate SC-FDMA symbols. In another aspect, traffic data and control information may be multiplexed at a modulation symbol level. The UE may encode and modulate traffic data to obtain data modulation symbols, encode and modulate control information to obtain control modulation symbols, multiplex the data and control modulation symbols, and generate SC-FDMA symbols. The UE may perform rate matching for traffic data to account for control information. The UE may also perform multiplexing and puncturing for different types of control information.
Abstract:
A high-speed multi-channel data transmission method is disclosed. The method includes that: a data sender replaces data at intervals of N periods with frame headers in data channels, sequentially stores the data replaced with the frame headers in the data channels in a Deskew channel, and sends the data in the data channels and data in the Deskew channel to a data receiver; the data receiver determines frame header locations of the data channels and the Deskew channel, calculates offsets of the data channels according to the frame header locations, and performs period compensation for the data channels according to the calculated offsets to keep the frame header of each data channel and the frame header of the Deskew channel in a relative relationship the same as that at the data sender; and the frame headers on the data channels and the corresponding data on the Deskew channel are replaced to finish data restoration. A high-speed multi-channel data transmission system and related devices are further disclosed. According to the embodiments of the disclosure, 400 Gb/s multi-channel data alignment and restoration can be realized, and speed of data alignment and restoration is increased.
Abstract:
A method and a device for reducing a bit error rate in a Code Division Multiple Access (CDMA) communication system are described, wherein this method includes: a sample sequence Iin of an in-phase component signal I, and a sample sequence Qin of a quadrature component signal Q are obtained, and the signals are sent by a signal sending end; the obtained sample sequence Iin and the sample sequence Qin are divided into different groups according to a sample number Ns of a chip, a sum-average operation is performed on a signal in each group, and a corresponding signal group is determined, wherein, the signal group determined by performing the sum-average operation on the sample sequence Iin is WI, the signal group determined by performing the sum-average operation on the sample sequence Qin is WQ; and a signal in the signal group WI and the signal group WQ is grouped to determine a signal belonging to the same chip in the sample sequence which experiences the sum-average operation, and the determined signal is output. The disclosure solves a problem in the related art that a CDMA synchronization method possesses a wrong sampling situation, which results in a high bit error rate of a receiving end, and reduces the bit error rate.
Abstract:
A system may be configured to determine radio frequency (“RF”) transmission error types associated with a group of channels. Each channel may be associated with a particular remote radio node (“RRN”), of a group of RRNs, and a user device. The system may further modify subsequent RF communications between the RRNs and the user device, on a per-channel basis, and based on the determined transmission error types associated with each channel.
Abstract:
A wireless communication device which includes: a sensing antenna for sensing communication by a primary user; a first transmission antenna; a second transmission antenna; first transmitting unit that generates a transmission signal to be transmitted from the first transmission antenna; second transmitting unit that generates a transmission signal to be transmitted from the second transmission antenna and that cancels, in the sensing antenna, a transmission signal from the first transmission antenna; digital signal processing unit that suppresses the transmission signal from the first transmission antenna, from a received signal of the sensing antenna; and sensing unit that detects communication by a primary user on the basis of the received signal of the sensing antenna that has been processed by the digital signal processing unit. While performing communication as a secondary user, the device detects communication by a primary user. Hence, constant sensing is enabled in a cognitive radio communication device.
Abstract:
A radio communication system that includes an encoder configured to perform error correction coding for control channel information by a given error correction coding rate and a modulator configured to perform modulation of the error correction coded control channel information for transmission according to a given modulation scheme, code decimation being performed for the error correction coded control channel information prior to the modulation, and the code decimation being different according to whether Multi Input Multi Output is applied or not.