摘要:
A method and apparatus for sharing a DL-DPCH in an NB-TDD system. Two time slots at the same position in two subframes forming one radio frame are allocated as a DPCH for two UEs. A Node B arranges data and control information for the UEs in the two time slots and transmits the data and control information to the UEs. The UEs extract the data and control information from the two time slots and acquire the data and control information destined for the individual UEs.
摘要:
A method and apparatus for transmitting scheduling grant information by a TFCI in Node B controlled scheduling of uplink packet transmission. In one embodiment, a scheduling command resulting from Node B controlled scheduling is mapped onto a TFCI and transmitted on the downlink. In another embodiment, an ACK/NACK signal determining retransmission of uplink packet data is mapped onto a TFCI and transmitted on the downlink.
摘要:
Disclosed is a structure of a downlink common channel for transmitting an ACK/NACK to notify whether retransmission should be performed through a transmission position of the downlink common channel according to a channel code of a time slot allocated to a UE, and a method for distinguishing an ACK from a NACK, in using a HARQ scheme for uplink transmission of a TDD CDMA scheme in a 3G mobile communication.
摘要:
A method and apparatus for sharing a DL-DPCH in an NB-TDD system. Two time slots at the same position in two subframes forming one radio frame are allocated as a DPCH for two UEs. A Node B arranges data and control information for the UEs in the two time slots and transmits the data and control information to the UEs. The UEs extract the data and control information from the two time slots and acquire the data and control information destined for the individual UEs.
摘要:
Disclosed is a structure of a downlink common channel for transmitting an ACK/NACK to notify whether retransmission should be performed through a transmission position of the downlink common channel according to a channel code of a time slot allocated to a UE, and a method for distinguishing an ACK from a NACK, in using a HARQ scheme for uplink transmission of a TDD CDMA scheme in a 3G mobile communication.
摘要:
A noise and interference power measurement apparatus for an antenna diversity system that services a plurality of users with an array antenna having a plurality of antenna elements. A channel estimator estimates a channel impulse response for a radio channel corresponding to a predetermined plurality of regularly spaced direction-of-arrival (DOA) values. A data estimator estimates the received data using a received signal and a system matrix. A quantizer quantizes the estimated data. An interference and noise calculator calculates noise vectors at the respective antenna elements by removing from the received signal an influence of the quantized data to which the system matrix is applied, calculates an estimated noise matrix at the plurality of antenna elements, calculates interference power by auto-correlating the estimated noise matrix, and calculates noise and interference power based on the interference power.
摘要:
An RNC determines parameters available for measurement of a synchronization signal and second Node B information from a second Node B, transmits the determined parameters to a first Node B during radio link setup and to a UE during radio bearer setup, and transmits parameter selection information to the first Node B and the UE, if it is recognized that measurement of the synchronization signal and the second Node B information is necessary. The first Node B changes a position of a downlink time period over which a downlink channel is transmitted from the first Node B to the UE and a position of an uplink time period over which an uplink channel is transmitted from the UE to the first Node B, according to parameters selected from the parameters. The UE receives the synchronization signal and the second Node B information in the remaining time periods except the changed downlink time period and the changed uplink time period among the plurality of time periods.
摘要:
A method and apparatus in a UE for detecting active channelization codes including channelization codes used by other UEs, which are different from at least one channelization code assigned to the UE, for transmission/reception to/from a Node B in an assigned time slot in a mobile communication system, where each of time slots of a radio channel frame is identified by a plurality of code channels, each having a unique channelization code. Accordingly, a channelization code set is formed to include a predetermined number of channelization codes to be searched, code channel data corresponding to the channelization codes is detected from a received signal, the code power of the code channel data is measured and compared with a predetermined threshold, and channelization codes having code power values exceeding the threshold are selected as active channelization codes.
摘要:
A method and apparatus in a UE for detecting active channelization codes including channelization codes used by other UEs, which are different from at least one channelization code assigned to the UE, for transmission/reception to/from a Node B in an assigned time slot in a mobile communication system, where each of time slots of a radio channel frame is identified by a plurality of code channels, each having a unique channelization code. Accordingly, a channelization code set is formed to include a predetermined number of channelization codes to be searched, code channel data corresponding to the channelization codes is detected from a received signal, the code power of the code channel data is measured and compared with a predetermined threshold, and channelization codes having code power values exceeding the threshold are selected as active channelization codes.
摘要:
A joint detection reception apparatus and method, which are utilized irrespective of a length of an orthogonal code in a TD-CDMA communication system. The joint detection reception method for creating a system matrix associated with a joint detection receiver in the same time slot includes the steps of a) repeating and partitioning individual channelization codes having variable lengths, and creating channelization code blocks having the same lengths, b) performing a convolution operation between the repeated and partitioned channelization code blocks and a channel impulse response, and acquiring combined impulse responses, c) grouping the combined impulse responses to construct sub-block matrices for a joint detection system, d) arranging the sub-block matrices for the joint detection system to be shifted by a predetermined column distance, and constructing a joint detection system matrix, and e) extending the joint detection system matrix to a squared-format matrix to create a block-circulant squared matrix.