摘要:
There is provided a method for placing reference signals in a wireless communication system. The method includes preparing a plurality of sub-frames for a plurality of antennas, placing a reference signal for one sub-frame and placing a reference signal for another sub-frame not to overlap with the reference signal for one sub-frame, wherein the reference signal for one sub-frame and the reference signal for another sub-frame are successively placed on contiguous OFDM symbols or on the contiguous sub-carriers. Channel estimation or data demodulation can be prevented from performance degradation.
摘要:
A signal transmission method for use in a multi-antenna system includes: receiving a complex signal using N antennas and M timeslots as a single unit, and generating a space-time code (STC) for performing interleaving and phase-shifting operations of the received complex signal; and applying the space-time code (STC) to the received complex signal, and transmitting the resultant signal. Therefore, the signal transmission method provides a space-time code (STC) provides a space-time code (STC) having higher performance and lower encoding complexity, and can effectively transmit the signal via the multi-antenna system.
摘要:
A method of transmitting feedback data in a multiple antenna system includes generating feedback data based on the channel information and transmitting the feedback data at transmission periods, wherein the feedback data is transmitted in a plurality of report types respectively having a different control signal type contained depending on the transmission periods.
摘要:
A method for transmitting data by using hybrid automatic repeat request (HARQ) includes allocating a radio resource for a non-acknowledgment (NACK) channel which is used to transmit a NACK signal for multi-user data of a plurality of UEs, transmitting the multi-user data, and retransmitting the multi-user data when receiving the NACK signal on the NACK channel from at least one UE which receives the multi-user data.
摘要:
A method for transmitting control information includes receiving a control information request, transmitting primary control information responding the control information request through a primary control channel and transmitting secondary control information responding the control information request through a secondary control channel, wherein the primary control channel uses data subcarriers and the secondary control channel uses pilot subcarriers.
摘要:
A method for transmitting data by using hybrid automatic repeat request (HARQ) is provided. A base station allocates a radio resource for a non-acknowledgement (NACK) channel which is used to transmit a NACK signal for multi-user data of a plurality of UEs, transmits the multi-user data, and retransmits the multi-user data when receiving the NACK signal on the NACK channel from at least one UE which receives the multi-user data.
摘要:
A method for transmitting control information includes receiving a control information request, transmitting primary control information responding the control information request through a primary control channel and transmitting secondary control information responding the control information request through a secondary control channel, wherein the primary control channel uses data subcarriers and the secondary control channel uses pilot subcarriers.
摘要:
A method of transmitting space-time coded data in a wireless communication system having a plurality of antennas is disclosed. More specifically, the method includes allocating data symbols combined with complex weights to at least two transmit antennas during at least one specified time slot, and transmitting the data symbols combined with complex weights to a receiving end via the at least two transmit antennas during the at least one specified time slot.
摘要:
A method for transmitting feedback information in a codebook-based multiple-input multiple-output (MIMO) system is disclosed. To transmit the feedback information, a signal is received to discern channel characteristics of the received signal, and a codebook is updated using an extended matrix including a plurality of vector components and using previous feedback information. Feedback information is selected for transmission from the updated codebook in consideration of the channel characteristics of the received signal.
摘要:
There is provided a method for enabling a user equipment to transmit feedback information. The method includes generating feedback data representing the feedback information, the feedback data expressed by a binary number having N bits, where N is an integer, the N bits comprising 2 levels, the feedback information represented by one of the 2 levels, wherein different types of the feedback information are assigned to different levels and transmitting the feedback data. Overheads incurred by transmission of feedback information can be reduced.