43results about How to "Increase frequency diversity gain" patented technology

A method of enhancing a downlink channel coding structure in an OFDMA (orthogonal frequency division multiple access) communication system is provided. The method includes: segmenting a concatenation of multiple transport blocks amongst multiple component carriers; and separately performing link adaptation for each component carrier according to channel conditions experienced by that component carrier.

A method of wirelessly transmitting control information includes generating control information comprising a plurality of control bits and encoding the control bits using a block code that outputs an encoded bit sequence comprising encoded bits b(0), b(1), . . . , b(19). The control bits are encoded using the block code by generating a linear combination of a plurality of basis sequences. The method also includes dividing the encoded bits into a first group and a second group. The first group includes the encoded bits {b(0), b(1), b(5), b(6), b(8), b(11), b(12), b(14), b(17), b(19)} and the second group includes the encoded bits {b(2), b(3), b(4), b(7), b(9), b(10), b(13), b(15), b(16), b(18)}. Additionally, the method includes transmitting the first group of encoded bits on a first set of carriers and transmitting the second group of encoded bits on a second set of carriers. The second set of carriers have different frequencies from the first set of carriers.

The invention discloses adaptive hybrid automatic repeat request (HARQ) technology, is applied to a system adopting frequency spectrum polymerization technology and provides a method for implementing adaptive HARQ by crossing carriers. The scheme is simple and effective, and the normal and high-efficiency work of the system is guaranteed. Particularly, an adaptive retransmission method comprises the following steps of: detecting physical downlink control channel (PDCCH) on a carrier and acquiring HARQ information; judging whether the HARQ information is retransmission data according to NDI in the HARQ information, and acquiring an HARQ process number in the system; reading CCI in the PDCCH, allocating related information according to resources in the PDCCH, and acquiring transmitted data from the carrier indicated by the CCI, if the NDI indicates the retransmission data, reading rv in the HARQ information, merging the acquired data with data in a soft cache corresponding to the HARQ process number of the system, accessing the merged data into the soft cache, performing cyclic redundancy check (CRC) on the data in the soft cache, if the data is verified to be accurate, transmitting an acknowledgement (ACK) signal to a base station, otherwise transmitting a negative acknowledgement (NACK) signal to the base station.

The invention discloses a data transmission method and device. The method includes the steps that a set S formed by different combinations of frequency hopping fhop values between sub-bands and mirror image frequency hopping fm values is acquired, wherein Nhop, and Nm represent the magnitude of the set S; according to cellular identifiers, the combination of the fhop values and the fm values corresponding to the output time index i is determined, wherein i is an integer from 0 to Ni-1, and Ni represents the output time index number and is contained in the set S; according to the physical resource block position nPRB(i) of transmitted data at the output time with the index being i, data are transmitted on time-frequency resources corresponding to the physical resource block position nPRB(i). With the method and device, frequency diversity gain of data is improved.