Abstract:
A method and apparatus provide reception of control signaling in a wireless communication network. A first set of a first number (k1) of control channel Blind Decoding (BD) candidates can be monitored (440) in a first subframe at an aggregation level for a control channel transmission in the first subframe starting from a first OFDM symbol position in the first subframe. A second set of a second number (k2) of control channel BD candidates can be monitored (450) in the first subframe at the aggregation level in the first subframe starting from a second OFDM symbol position in the first subframe. A third set of a third number (k3) of control channel BD candidates can be monitored (460) in a second subframe at the aggregation level in the second subframe starting only from a first OFDM symbol position in the second subframe when a Downlink Control Information (DCI) intended for the device is successfully decoded from a candidate in the second set of the second number (k2) of control channel BD candidates, where k3>k1 and k3>k2. The first OFDM symbol position in the first subframe can be the same position as the first OFDM symbol position in the second subframe.
Abstract:
An apparatus comprising a receiver configured to receive a super-symbol comprising a first modulation symbol and a second modulation symbol, wherein the first modulation symbol comprises a first modulation format, and wherein the second modulation symbol comprises a second modulation format, and a processor coupled to the receiver and configured to select, for the first modulation symbol, a first nearest candidate symbol from a first set of candidate symbols associated with the first modulation format, select, for the second modulation symbol, a second nearest candidate symbol independent of the first nearest candidate symbol from a second set of candidate symbols associated with the second modulation format, and determine a soft decision value for a first bit in the super-symbol according to the first nearest candidate symbol and the second nearest candidate symbol.
Abstract:
방송 신호 송신기가 개시된다. 본 발명에 따른 방송 신호 송신기는 코어 레이어 데이터를 FEC 인코딩하는 제 1 BICM 유닛; 인핸스드 레이어 데이터를 FEC 인코딩하는 제 2 BICM 유닛; 상기 코어 레이어 데이터 및 상기 인핸스드 레이어 데이터를 컴바이닝하여 LDM(Layered Division Multiplexing) 데이터를 출력하는 LDM 인젝션 유닛; 상기 LDM 데이터를 타임 인터리빙하는 타임 인터리버; 시그널링 정보를 전달하는 프리앰블 및 상기 LDM 데이터를 포함하는 신호 프레임을 생성하는 프레이밍 유닛 및 상기 신호 프레임에 OFDM 변조를 수행하여 방송 신호를 생성하는 웨이브폼 생성 유닛을 포함한다.
Abstract:
The invention relates to a method for demodulating a received signal relating to a sequence of transmitted symbols that have been modulated by continuous phase modulation, the method comprising the steps of: normalizing samples of a sequence of samples generated from the received signal, to obtain a normalized sequence of samples, wherein an amplitude of each sample of the normalized sequence of samples has an absolute value equal to unity, estimating, on the basis of the normalized sequence of samples, a time offset and a frequency offset of the received signal, and using the estimated time offset and the estimated frequency offset for compensating the normalized sequence of samples for the time and frequency offsets, to obtain a compensated sequence of samples, and determining a sequence of symbols corresponding to the transmitted sequence of symbols on the basis of the compensated sequence of samples. The invention further relates to a receiver for demodulating a received signal relating to a sequence of transmitted symbols that have been modulated by continuous phase modulation.
Abstract:
Methods and devices are disclosed for encoding and decoding convolutional codes in a communication system. In various embodiments of the disclosure, a codeword comprises message data and parity data. A convolutional codeword is generated by multiplying the message data and the parity data with a convolutional polynomial. The convolutional codeword may be decoded by a convolutional code decoder that uses the convolutional polynomial and a maximum likelihood divisor to obtain a maximum likelihood message from the convolutional codeword.
Abstract:
A method of operating a wireless communication terminal includes receiving one or more downlink control messages that each contain scheduling information scheduling the wireless termina! to receive a downlink transmission on either a primary carrier or a secondary carrier. The method also includes determining, for each of the downlink control messages, whether that message includes scheduling information for the primary carrier or for a secondary carrier. Additionally, the method includes selecting a format for an uplink control message based on whether any of the downlink control messages includes scheduling information for a secondary carrier, generating an uplink control message based on the selected, format, and transmitting the uplink control message to the base station.
Abstract:
The application provides a receiver device (40) of a data packet communication network (13). The receiver device (40) comprises a receiver unit, a decoder unit (40) and, a data validity module. The receiver unit receives data packets. The decoder unit (40) decodes the received data packets. The data validity module comprises a data validity unit (37) and a data validity controller unit (39). The data validity unit (37) generates data validity information of the received data packet. The data validity controller unit (39) is connected with the decoder unit (40) and causes the decoder unit (40) to abort the decoding of the data packet if the data validity information indicates that the data packet is invalid.
Abstract:
k input bits are encoded according to a code with which is associated a m x n=m+k parity check matrix H. The resulting codeword is punctured, with n' bits. The punctured codeword is exported to a corrupting medium such as a communication channel or a memory. A representation of the punctured codeword is imported from the corrupting medium and is decoded using a matrix H' that is smaller than H. For example, H' is m'=m~(n-n ') x n' and is derived by merging selected rows of H. Alternatively, H has at most m rows and fewer than n columns but more than n' columns. Alternatively, H has fewer than m'=m-(n-n') rows and fewer than n' columns.
Abstract:
Systems and methodologies are described that facilitate ensuring contention and/or collision free memory within a turbo decoder. A Posteriori Probability (APP) Random Access Memory (RAM) can be segmented or partitioned into two or more files with an interleaving sub-group within each file. This enables parallel operation in a turbo decoder and allows a turbo decoder to access multiple files simultaneously without memory access contention.