36results about How to "Increase uplink capacity" patented technology

A method and apparatus for using a multi-user detector for reducing multiple access interference (MAI) in a direct sequence CDMA wireless system such as W-CDMA. A superconducting rapid single flux quantum (RSFQ) RF digital receiver operating in combination with an RSFQ successive interference canceller (SIC) is located in the base stations of the wireless system. In the present invention, the RSFQ SIC is a vector machine capable of processing the cross-correlation matrices using an iterative method to decorrelate the user binary code sequences from the input signal in which the interference components are removed. According, the reduction in interference results in a significant increase in system capacity while improving cellular coverage area.

The invention discloses a pairing method for virtual multi-input multi-output of up multi-user equipment UE, which is applied to condition that one sending antenna is used when each UE sends data and two sending antennae are used when a base station Node B receives data. The Node B pairs a plurality of UEs according to a codebook corresponding to each UE channel matrix so as to cause the inner product between column vectors of the codebooks corresponding to two paired UEs to be zero. An up virtual MIMO provided by the invention allows two UEs having sending antennae to transmit the data on the same resources (including the time, the frequency range resources, the spreading codes and the like). The pairing method can lower the dimension limit of an orthogonal system, and can increase the up capacity and the UE throughput.

The embodiments of the invention provide a reference signal sequence transmission method and a piece of equipment. The method comprises the following steps: user equipment receives configuration information sent by a base station, wherein the configuration information is used to indicate a first basic sequence group allocated by the base station for the user equipment, the configuration information is generated by the base station based on a division mode of basic sequence groups in a communication system where the base station is located, the division mode divides the basic sequence groups in the communication system into multiple basic sequence sets, each basic sequence set contains at least one basic sequence group, at least one of the multiple basic sequence sets contains at least two basic sequence groups, and a first basic sequence set to which the first basic sequence group belongs is one of the multiple basic sequence sets; the user equipment determines a first basic sequence set according to the configuration information; and the user equipment generates a reference signal according to the first basic sequence set, and sends the reference signal to the base station.

The invention discloses a method and a system thereof for realizing uplink power control in a feedback enhancement system of time division duplex, which applies a bidirectional spectrum and comprises the following processes: a base station alternatively distributes uplink time slots in a wireless frame of the bidirectional spectrum to different terminals or different terminal groups; each terminal or each terminal group obtains the uplink time slots with the same interval; the base station chooses a unidirectional spectrum of a downlink to transfer a feedback signal of power control to the terminals; a wireless frame on the unidirectional spectrum and that on the bidirectional spectrum keep synchronous; the terminals transfer uplink signals within the distributed uplink time slots to the base station; the base station finishes parameter estimation within a specific delay and transfers a feedback signal of power control to the terminals by adopting the unidirectional spectrum; the terminals receive the feedback signal of power control on the unidirectional spectrum and regulate power control of terminals, thus preparing for transferring the uplink signals within downlink-uplink time slots distributed for the terminals within the same wireless frame. The invention realizes sending down the feedback signal of power control with high frequency of which the period is shorter than the length of the frame; besides, the feedback delay is small, and the system throughput is increased.

A method for communication includes providing a first transceiver configured to communicate with a second transceiver over a bi-directional link having a first aggregation of frequencies that are assigned to carry first communication traffic in a first link direction from the first transceiver to the second transceiver and a second aggregation of frequencies that are assigned to carry second communication traffic in a second link direction from the second transceiver to the first transceiver. Communication feedback is transmitted from the first transceiver to the second transceiver communication feedback at an adaptive feedback rate. The feedback rate is determined so as to achieve a desired balance between the information carrying capacities of the first and second aggregations. An information carrying capacity of the second aggregation is controlled responsively to the communication feedback.

The method comprises following steps: 1) at signal emitting side, making STOB coding for source data block (Q-block) to form a STOB matrix; the STOB encoder outputs bit-stream gmk (l) (i|Q) to make channel mapping; wherein, gmk (l) (i|Q) represents a number i column data in number Q block in number k user emitted from number m antenna; while making channel mapping for gmk (l) (i|Q), a corresponding emitting antenna coding data is inserted into the parallel data of dedicated polite channel; 2) at signal receiving side, the Node B receiver identifies emitting antenna while making channel estimation to get a channel estimation value and an emitting antenna corresponding to the channel estimation value; 3) defining the emitting electromagnet coupling channel; 4) defining the system performance parameter.

A radio frequency (RF) circuitry includes a device that taps a transmission line and picks up some of electromagnetic signals traveling in both directions. The RF circuitry includes a first detector, a second detector, a third detector, and a processor. The first detector measures a power of a first portion of the tapped electromagnetic signal travelling in one direction. The second detector measures a power of a first portion of the tapped electromagnetic signal travelling in the other direction. The third detector measures a power of a combined signal which includes a second portion of the tapped electromagnetic signal travelling in the one direction and a second portion of the tapped electromagnetic signal travelling in the other direction. The processor determines, based on outputs from the detectors, a relative magnitude and a relative phase of the electromagnetic signals.

VDSL (Very-high-data-rate Digital Subscriber Line) technology uses at least one downlink frequency band (D1, D2) for conveying information from a data network to a subscriber's transceiver unit. At some sites VDSL technology cannot be used because no standardized uplink frequency band (U1, U2) is usable. The invention solves this problem by using at least one non-VDSL uplink frequency band (N1) for conveying information from the subscriber's transceiver unit to the data network.

The invention provides a UE uplink specialized resource control method. The method includes: when UE is about to enter a DRX sleep mode or after the UE enters the DRX sleep mode, an uplink specialized resource is released, and the UE enters an uplink out-of-step state. According to the method, when the ultra-long DRX is introduced, uplink specialized resources such as PUCCH and SRS etc. can be reasonably used, and the uplink capacity is increased.

The invention discloses an uplink power optimal allocation method and device and a mobile terminal. The method comprises the steps of in a case that more than two communication connections are established between the mobile terminal and a base station, according to transmission quality of a downlink channel in each communication connection, allocating transmission power of the mobile terminal on each communication connection. According to the uplink power optimal allocation method and device and the mobile terminal which are disclosed by the invention, according to a water filling principle, in a case of considering channel quality, uplink power of double connections or multiple connections is subjected to optimal allocation, so that power allocation efficiency of the mobile terminal is improved, uplink capacity is promoted and system capacity reaches the maximum.