Abstract: Closed loop MIMO FDD schemes can offer significant performance gains for OFDM based wireless communication systems over open loop MIMO schemes. However, the pre-coding weights (eigenvectors) on each of the frequency bands need to be updated and this adds extra overhead. The number of adjacent frequency fingers which can use the same pre-coding weights is governed by the coherence bandwidth of the eigen spatial modes. The receiver uses the average r.m.s. delay spread of the SISO channels as an indicator to the eigen coherence bandwidth, rather than explicitly calculating the eigen coherence bandwidth itself. This technique can be applied to TDD schemes as well, where the channel estimation is done with the reverse link, eliminating the need for feedback. The TDD transmitter can estimate the eigen coherence bandwidth on the basis of average r.m.s. delay spread, which saves computational effort.

Abstract: A wireless transceiver comprising: a receiver adapted to receive signals in a television broadcast band; and a transmitter adapted to transmit signals in a different band. Also provided is a counterpart transceiver. The latter transceiver comprises: a transmitter adapted to transmit signals in a television broadcast band; and a receiver adapted to receive signals in the different band.

Abstract: A method of allocating a resource by a base station is provided. The base station allocates a plurality of radio resources for transmitting a plurality of data bursts to a plurality of subframes in one frame, respectively, and generates a resource allocation information signal including allocation information on the plurality of radio resources. The base station transmits the resource allocation information signal to a mobile station through one subframe.

Abstract: Various example embodiments are disclosed herein. According to an example embodiment, an apparatus may include a wireless interface, and a controller, the apparatus being configured to: transmit a downlink subframe of a frequency division duplex (FDD) frame to one or more mobile stations in a wireless network, each wireless station being assigned to one of a plurality of groups, such as, for example, one of group 1 or group 2, the downlink subframe including at least: a group 1 portion and a group 2 portion, wherein a group boundary between the group 1 portion and the group 2 portion of the downlink subframe is variable, at least one of the group 1 portion and the group 2 portion including a group boundary information identifying a location of the group boundary or a location of the group 2 portion in the downlink subframe.

Abstract: A method for enhancing the use of radio resource allocated to data communication between user equipments and a radio access network infrastructure adapted for operating in first and second frequency bands for providing respective first and second services to user equipments is proposed. According to the method, a user equipment detects an actual or potential occurrence of a radio-frequency co-existence issue between the radio transmissions for said first and second services, and transmits information regarding the detected radio-frequency co-existence issue.

Abstract: A wideband telecommunications device with narrow band support. The device may be a receiver having a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein the first frequency band is within the second frequency band. The receiver may also be a processing system configured to recover the data in the first signal from the combined first and second signals.

Abstract: A system and method for synchronous spectrum sharing for use in a wireless communication system based on orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) signaling is disclosed. The system includes a frame detector configured to detect a frame of a broadcast waveform and extract sub-carrier information from the frame. Sub-carrier information may include information on usable sub-carrier and pilot sub-carriers for secondary users. The system allows transmitting data from the secondary user node in unused sub-carriers thereby making efficient use of unused or idle spectrum. Accordingly, secondary users of wireless communication systems can dynamically form ad-hoc mesh network communications in fixed or mobile scenarios.

Abstract: Techniques for transmitting control information to support communication on multiple component carriers (CCs) are disclosed. A user equipment (UE) may be configured for operation on multiple CCs. These CCs may be associated with control messages having different definitions. For example, a control message for a CC configured for frequency division duplex (FDD) may have a different definition than a control message for a CC configured for time division duplex (TDD). A base station may send first control information for a first CC based on a definition of a control message for a second CC, instead of a definition of a control message for the first CC. The control message for the second CC may be selected for use to send the first control information based on various designs.

Abstract: A wireless communication device receives a first user instruction to execute a first application requiring first wireless communications. The device selects a first wireless protocol for the first wireless communications based on the first application. A transceiver in the device exchanges the first wireless communications with a first wireless communication access node using the first wireless protocol and monitors a first paging channel of the first wireless protocol. A paging receiver monitors a second paging channel of a second wireless protocol in response to the application-based selection of the first wireless protocol.

Abstract: Certain aspects of the present disclosure provide a dual antenna distributed radio frequency front end (RFFE). RFFE topologies described herein may provide lower insertion loss (IL), reduced emission mask, decreased power consumption, and/or lower noise figure (NF) compared to conventional RFFE topologies. One example apparatus for wireless communications generally includes first and second power amplifiers (PAs) for amplifying signals for transmission, a transmit antenna for transmitting the amplified signals, a receive antenna for receiving other signals to be processed in a receive path, and a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA. For certain aspects, a divided inter-stage filter providing overlapping frequency bands may be utilized. For certain aspects, the RFFE may support frequency-division duplexing (FDD)/TDD (time-division duplexing) coexistence, including support for FDD/TDD MIMO (multiple input multiple output).

Abstract: A frequency division (FD) multiplexing device includes a multiplexer including a band-pass and a band-stop filter, the multiplexer is communicatively coupled to an antenna, the band-pass filter is configured to allow pass band frequencies to pass un-attenuated and to attenuate signals outside of the pass band. The band-stop filter is configured to attenuate signals at frequencies in at least a portion of the pass-band and allow frequencies outside the pass-band to pass un-attenuated.

Abstract: A method and device for acquiring user equipment duplex mode information are disclosed by the present invention, wherein, the method includes: the user equipment establishes a radio resource control connection with a base station, and reports the user equipment duplex mode information when establishing the radio resource control connection. With the technical scheme provided in the embodiments of the present invention, the network side acquires the duplex mode of the user equipment.

Abstract: When multicarrier transmission is performed, a mobile communication service is appropriately provided according to the configuration of a user equipment. A radio base device eNB according to the present invention includes a control signal reception unit 13 configured to receive a control signal for notifying the capability “Capability” of the user equipment UE from the user equipment UE, wherein the control signal includes information on simultaneously communicable carriers and information on a carrier capable of transmitting an uplink signal among the simultaneously communicable carriers.

Abstract: A power control method for a Physical Uplink Control Channel, which includes: when the response information of multiple Physical Downlink Shared Channels (PDSCH) sent by a base station over multiple component carriers is sent on one Physical Uplink Control Channel (PUCCH), the base station indicating a unified transmitted power control command for the Physical Uplink Control Channel; or the base station indicating multiple transmitted power control commands for the Physical Uplink Control Channel. The present invention also provides a base station and a user equipment.

Abstract: Methods and systems for coexistence in a multiband, multistandard communication system utilizing a plurality of phase locked loops (PLLs) are disclosed. Aspects may include determining one or more desired frequencies of operation of a transceiver, determining a frequency of unwanted signals such as spurs, intermodulation, and/or mixing product signals, and configuring the PLLs to operate at a multiple of the desired frequencies while avoiding the unwanted signals. The desired frequencies may be generated utilizing integer, which may include multi-modulus dividers. The wireless standards may include LTE, GSM, EDGE, GPS, Bluetooth, WiFi, and/or WCDMA, for example. The frequencies may be configured to mitigate interference. PLLs may be shared when operating in TDD mode, and used separately operating in FDD mode. One or more digital interface signals, zero exceptions on a transmitter spur emission mask, and sampling clocks for ADCs and/or DACs in the transceiver may be generated utilizing the PLLs.

Abstract: An apparatus and method for wireless communication uses carrier aggregation (LTE, HSPA) having an improved feedback operation that optimises the radio interface for the uplink direction (LTE).

Abstract: Methods, devices and systems are provided for transmitting and receiving MIMO signals. In one embodiment, transmitting_of the MIMO signals involves pre-coding each of at least two data symbols using a respective pre-coding codeword to preclude a corresponding plurality of pre-coded data symbols. A respective signal is transmitted from each of a plurality of antennas, the respective signal including one of the pre-coded signals and at least one pilot for use in channel estimation. The signals collectively further include at least one beacon pilot vector consisting of a respective beacon pilot per antenna, the beacon pilot vector containing contents known to a receiver for use by the receiver in determining the codeword used to pre-code the at least one data signal.

Abstract: The method for scheduling, at an MS, data transmission and reception of neighbor BSs adjacent to the MS in a wireless communication system includes receiving number information through a specific downlink channel in a first time unit from each of the neighbor BSs, determining, among the neighbor BSs, a BS which is to transmit and receive data in a second time unit, in a predefined rule, according to the number information and fairness information based on one or more of a number of MSs within a cell served by each of the neighbor BSs and a number of time units that each of the neighbor BSs used previously for data transmission and reception, and transmitting a signal indicating that data transmission and reception in the second time unit are not possible, to the other neighbor BSs excluding the determined BS among the neighbor BSs.

Abstract: A terminal unit for receiving a hybrid automatic retransmission request (HARQ) feedback using a frequency division duplex (FDD) frame comprises: a receiver, which receives an uplink assignment information element (A-MAP IE) for allocating each uplink through each downlink subframe of a first frame from a base station; a processor, which performs a process for transmitting uplink data that corresponds to the received A-MAP IE for allocating each uplink for a predetermined processing time: a transmitter, which transmits the processed uplink data to the base station from the respective downlink subframes having received the A-MAP IE for allocating each uplink, through each corresponding uplink subframe, after the predetermined processing time has lapsed; and a receiver, which receives, from the base station, the downlink HARQ feedback for each uplink data through each uplink subframe that has, in a third frame, the same index as the index of each downlink subframe where the A-MAP IE for allocating each uplink ha

Abstract: The present specification describes techniques and apparatuses for peer-to-peer frequency band negotiation. In some embodiments, techniques are described using a bit vector that are fast and/or require low data throughput.

Abstract: Carrier aggregation to enhance Evolved Multimedia Broadcast Multicast Service (eMBMS) includes transmitting unicast signaling for a unicast service on an anchor carrier to mobile entities, transmitting eMBMS signaling on a second carrier different from the anchor carrier to the mobile entities for use with the unicast signaling, and various techniques for practical application of carrier aggregation for eMBMS enhancement. In addition, allocating subframes used for MBMS on a Single Frequency Network (MBSFN) includes allocating at least a portion of one or more subframes otherwise reserved for unicast subframes on a mixed carrier to provide an increased allocation of subframes carrying MBSFN information, transmitting MBSFN signals on the increased allocation of subframes, and more detailed aspects.

Abstract: The present invention discloses an FDD (Frequency Division Duplex) system based multi-user beamforming method and device. In the method, when two or more user terminals are at respective AOAs (Angles of Arrival), a transmit weight of a downlink signal of each user terminal is determined by using a null-widening algorithm, and the transmit weight is stored in a network side, the network side groups the user terminals based on AOA information reported by the user terminals, a corresponding transmit weight for the downlink signal of each user terminal in each group is selected based on the AOA information of the user terminals in the group, and the selected transmit weight is transmitted after multiplying it by a downlink data stream of the user terminal corresponding to the transmit weight.

Abstract: A method of frequency division duplex (FDD) wireless communications asymmetrically maps between downlink and uplink spectrum blocks. Multiple downlink spectrum blocks may be mapped to an uplink spectrum block.

Abstract: A method for transmitting and receiving signals in consideration of a time alignment timer and user equipment (UE) for the same are provided. In this method, a UE performs initial transmission or retransmission of an uplink signal using wireless resources corresponding to an uplink grant signal received from a base station only when a time alignment timer of the UE is running. The UE does not transmit a HARQ feedback signal for a downlink signal received from the base station to the base station when the time alignment timer of the UE is not running.

Abstract: By the present invention a calibration and/or correction of transmit signals in a communication system using Frequency Division Duplex has been disclosed, in particular a method of calibration of a transmit signal to be transmitted in a device simultaneously receiving and transmitting signals in the communication system, wherein the transmit signal and the receive signal are separated by a predetermined frequency band gap. A down-conversion of the transmit signal received in the receiving path to an intermediate frequency is performed, whereby the intermediate frequency corresponds to the frequency band gap reduced by the intermediate frequency of the receive signal. A correction signal is derived from the intermediate received transmit signal and used to calibrate the transmit signal such that non-linearity effects caused by power amplifiers in the transmit path are effectively reduced.

Abstract: In a direct-conversion type orthogonal demodulator used in a multi-band receiver, influence to signal-receiving characteristics of the receiver, caused by DC offset drift produced when a band is switched to another, is reduced. In a multi-band receiver including a plurality of orthogonal demodulators each carrying out orthogonal demodulation for each of a plurality of band inputs, a switch which selects one of outputs transmitted from the orthogonal demodulators in accordance with a band-switching control signal, and a high pass filter receiving an output transmitted from the switch, a cut-off frequency of the high pass filter is raised when a band is switched to another, to thereby shorten a convergent time of DC offset drift included in an output signal.

Abstract: A frequency division multiplex transmission signal receiving apparatus for receiving a frequency division multiplex transmission signal using a plurality of carries includes: an estimation section estimating a transfer function of a received signal after the received signal has been transformed into a frequency domain signal; a demodulation section demodulating the received signal according to the transfer function estimated by the estimation section; a plurality of variation detecting sections performing variation detection using a plurality of different variation detection methods, based on the transfer function estimated by the estimation section; a reliability determining section determining reliability based on a result of a combination of variation detection results of the plurality of variation detecting sections; and a correction section performing error correction of the demodulated signal from the demodulation section, the demodulated signal being subjected to an application of a reliability determi

Abstract: A signal generator for a transmitter or a receiver for transmitting or receiving RF-signals according to a given communication protocol includes an oscillator and a mismatch compensator. The oscillator is configured to provide a signal generator output signal having a signal generator output frequency and comprises a fine tuning circuit for providing a fine adjustment of the signal generator output frequency based on a fine tuning signal and a coarse tuning circuit for providing a course adjustment of the signal generator output frequency based on a coarse tuning signal.

Abstract: A method for detecting and/or estimating a ranging signal in a wireless communications network, wherein the ranging signal comprises a plurality of tiles. The method includes (i) for two or more of the plurality of tiles, carrying out a plurality of mathematical correlations for one or more of the plurality of tiles but less than all of the plurality of tiles products between subcarriers, wherein at least one of the plurality of products is carried out between non-adjacent subcarriers associated with one of the two or more of the plurality of tiles; (ii) summing the results of the correlations products, thereby obtaining mathematical correlations that make up summed results; and (iii) based on the summed results, detecting a code characterizing the ranging signal and/or estimating the timing offset of the ranging signal.

Abstract: A control unit assigns a plurality of data signals in a manner that, of the plurality of data signals, data signals of higher data rate are assigned anteriorly. Of terminal apparatuses to which the plurality of data signals are to be transmitted respectively, the control unit specifies a terminal apparatus to which a training signal is to be transmitted. If the data signal to be sent to the specified terminal apparatus is contained in an anterior part of the packet signal, the control unit will append a training signal to a front part preceding a leading data signal. If the data signal to be sent to the specified terminal apparatus is not contained in an anterior part of the packet signal, the control unit will move this data signal to a posterior part of the packet signal and then append a training signal to a front part preceding this moved data signal.

Abstract: A base station device of the present invention includes a downlink signal reception unit 12 that receives a downlink signal from another base station device, and a synchronization processing unit 5b that obtains a known signal contained in the downlink signal from the another base station device and that performs inter-base-station synchronization with the another base station device based on the known signal. The synchronization processing unit 5b performs inter-base-station synchronization such that the transmission timing of the known signal in its own downlink signal is different from the transmission timing of the known signal in the downlink signal of the another base station device.

Abstract: To efficiently control channel quality indicators CQIs in response to a plurality of downlink component frequency bands in a wireless communication system using a plurality of component frequency bands, and enable a mobile station apparatus to suitably transmit signals including the channel quality indicators CQIs, the mobile station apparatus is provided with an uplink control data generation part 407 that generates a channel quality indicator in response to each of the downlink component frequency bands, an uplink control channel selection part 409 that selects a particular radio resource when a plurality of radio resources, which are beforehand allocated from the base station apparatus to transmit the channel quality indicator for each of the downlink component frequency bands, occurs in the same time frame, and a transmission processing part 405 that arranges the channel quality indicator generated in the uplink control data generation part 407 in the radio resource selected in the uplink control channel

Abstract: One object of the present invention is to improve stability of wireless communication, regardless of a movement speed of a mobile station by estimating a movement speed of a mobile station using a signal prepared in advance for a used standard and selecting an appropriate base station. In the wireless communication system 100 according to the present invention, in order to adjust a timing of receiving data from the PHS terminal 110 to a desired timing, base stations 120, 122 transmit an adjustment signal for advancing or delaying data transmission timing in the PHS terminal 110. Thus, the PHS terminal 110 calculates a bias amount of such an adjustment signal to determine high speed movement of the PHS terminal 110 and perform handover from a micro cell base station 120 to a macro cell base station 122.

Abstract: Interference suppression by beam forming is achieved even in an FDD (Frequency Division Duplex) system. A base station device 1 performs communication based on FDD. The base station device 1 includes a downlink signal reception unit 12 that receives a downlink signal transmitted from another base station device. The base station device 1 performs a beam forming process for directing a null beam to an arrival direction of the downlink signal from the another base station device, by using transmission path information between the base station device and the another base station device, the information being available from the downlink signal received by the downlink signal reception unit 12.

Abstract: A user terminal supports multiple spatial multiplexing (SM) modes such as a steered mode and a non-steered mode. For data transmission, multiple data streams are coded and modulated in accordance with their selected rates to obtain multiple data symbol streams. These streams are then spatially processed in accordance with a selected SM mode (e.g., with a matrix of steering vectors for the steered mode and with the identity matrix for the non-steered mode) to obtain multiple transmit symbol streams for transmission from multiple antennas. For data reception, multiple received symbol streams are spatially processed in accordance with the selected SM mode (e.g., with a matrix of eigenvectors for the steered mode and with a spatial filter matrix for the non-steered mode) to obtain multiple recovered data symbol streams. These streams are demodulated and decoded in accordance with their selected rates to obtain multiple decoded data streams.

Abstract: In embodiments, a first wireless device generates symbols for transmission to another wireless device. Adaptive power control is applied to the transmissions, for example, at symbol or frame boundaries. When a transmit power gain adjustment exceeds a threshold, all or part of the gain adjustment may be performed on the generated symbols before the symbols are combined in an overlap-and-add process. Part of the gain adjustment may also be performed through adjustment of the power amplifier. When the gain adjustment does not exceed the threshold, all of the gain adjustment may be performed through adjustment of the power amplifier. Performing gain adjustment before the overlap-and-add process results in a lower spectral spread of the transmitted waveform and improved bandwidth utilization efficiency. In embodiments, the power adjustment techniques are used in FDD/OFDM systems or other systems where a plurality of symbols or frames is transmitted substantially continuously.

Abstract: A radio base station eNB according to the present invention includes: an upper-layer information transmission unit 11 configured to transmit a length of CP used in neighbouring cells #1 to #3; and a PRS transmission unit 12 configured to transmit, when the subordinate cell #2 is included in the neighbouring cells #1 to #3, the PRS generated based on the length of CP, in the subordinate cell #2.

Abstract: A method for managing uplink channel estimation in a base station includes transmitting downlink data from a base station to a mobile terminal in a radio access network over a first portion of a Frequency Division Duplex (FDD) spectrum. The first portion of the FDD spectrum is designated for downlink data transfer. The method also includes transmitting a predetermined reference signal from the base station to the mobile terminal over a second portion of the FDD spectrum. The second portion of the FDD spectrum is designated for uplink data transfer. The predetermined reference signal permits the mobile terminal to perform a channel estimate on at least a portion of the second portion of the FDD spectrum. The method additionally includes receiving uplink data transmitted from the mobile terminal to the base station over the second portion of the FDD spectrum.

Abstract: Apparatus and a method of cell reselection in a wireless telecommunications device operative with a plurality of radio access networks are disclosed. The method comprises, when the device is camped on a first radio access network: ranking cells in a neighbouring list according to cell reselection criteria; considering for cell reselection a cell in the neighbouring list; when the cell in the list is a cell of a second radio access network different from the first radio access network, applying an algorithm for cell reselection from the second radio access network to the first radio access network; and when the algorithm as applied would result in reselection to the first radio access network, considering for cell reselection another cell in the list.

Abstract: A method for transmitting and receiving Uplink Control Information (UCI), a terminal, and a base station are provided. The transmitting method includes: calculating the number (Q?) of modulation symbols occupied by the UCI to be transmitted; dividing the information bit sequence of the UCI to be transmitted into two parts; using Reed Muller (RM) (32, 0) codes to encode each part of information bit sequence of the UCI to be transmitted to obtain a 32-bit coded bit sequence respectively, and performing rate matching so that the rate of the first 32-bit coded bit sequence is ?Q?/2?×Qm bits and that the rate of the second 32-bit coded bit sequence is (Q???Q?/2?)×Qm bits; and mapping the two parts of coded bit sequences that have undergone rate matching onto a Public Uplink Shared Channel (PUSCH), and transmitting the coded bit sequences to a base station.

Abstract: Methods, systems, devices, and computer program products are described which facilitate the transmission and reception of acknowledgment/negative acknowledgment (ACK/NACK) feedback associated with downlink data transmissions in a multi-carrier wireless communication system. Scheduling request resources may be utilized to enable the transmission of ACK/NACK feedback for the multiple component carriers when a positive scheduling request is present and the techniques described may be utilized to improve the efficiency of control channel signaling in different system configurations.

Abstract: Disclosed are an apparatus and a method for performing communication using a half-frequency division duplex (H-FDD) frame structure in a mobile communication system. A user equipment for performing communication using an H-FDD frame structure according to the present invention comprises an RF unit in which each user equipment group receives and transmits signals using the H-FDD frame structure wherein the order of the downlink zone and uplink zone are reversely allocated to each of the groups. The downlink zone and uplink zone, which are allocated to each of the user equipment groups in the H-FDD frame structure, include a sub-frame wherein one or more symbols are allocated to idle time slots or are punctured. Each of the user equipment groups can receive and transmit signals using symbols that are not allocated to the idle time slots or are not punctured in the sub-frame.

Abstract: A method for retransmitting data in wireless communication system is disclosed. MS can receive a NACK (Not-Acknowledge) signal from a base station (BS) through a specific downlink subframe of a specific frame in a first superframe, and the MS can retransmits the data using a second uplink subframe in a first frame in a second superframe subsequent to a first superframe. In this case, a index of the second uplink subframe may be 1. The wireless communication system can support the Half-Frequency Division Duplex (H-FDD) scheme. A first uplink subframe in the first frame of the second superframe can be punctured.

Abstract: A method of performing channel sounding in a frequency division duplex (FDD) system in which an uplink frame and a downlink frame use different frequency bands includes dividing a transmission bandwidth with respect to the uplink frame into a plurality of sounding zones, allocating at least one of the plurality of sounding zones to a user equipment and receiving a sounding signal from the user equipment through the allocated sounding zone. Inter-cell interference can be mitigated and overhead due to transmission of the sounding signal can be reduced.

Abstract: A method for allocating an Acknowledgement/Negative Acknowledgement (ACK/NACK) channel by a Base Station (BS) in a Frequency Division Duplexing (FDD) system is provided. The method includes allocating downlink resources in one or more cells to a User Equipment (UE), transmitting, Physical Downlink Control Channel (PDCCH) information and downlink data using the downlink resources, allocating at least four ACK/NACK channels to the UE, receiving ACK/NACK information for the PDCCH information and the downlink data fed back by using two antennas from the UE, and performing re-transmission or transmitting new data according to the ACK/NACK information, wherein at least two of the at least four ACK/NACK channels are the same as at least two ACK/NACK channels allocated by the BS in a mode not using a Spatial Orthogonal Resource Transmit Diversity (SORTD) scheme, and the at least two of the at least four ACK/NACK channels are allocated to different antennas.

Abstract: In a first configuration, a first BS communicates with a first UE through at least one CC. The first BS determines whether to aggregate the at least one CC with at least one additional CC for communication with the first UE based on an interference caused to a second BS and/or a second UE. The at least one additional CC is used by the second BS to communicate with the second UE. In a second configuration, an BS communicates with a first UE and a second UE through at least one CC. The BS determines whether to aggregate the at least one CC and at least one additional CC for communication with the second UE based on an interference caused to the first UE and/or a third UE. The at least one additional CC is used by the first UE to relay information between the third UE and the BS.

Abstract: A method of pre-equalizing a data signal transmitted in frequency division duplex includes receiving via an originating reference antenna a first pilot sequence transmitted by a destination antenna through a first channel, and estimating a first impulse response of the first channel; receiving via a destination antenna a second pilot sequence transmitted by an originating antenna through a second channel, and estimating a second impulse response of the second channel; receiving, via the reference antenna, a third pilot sequence modulated by the second impulse response and transmitted by the destination antenna, and estimating a combined impulse response of the first and second channels in succession; time reversing the combined impulse response; combining the time-reversed combined impulse response and the first impulse response; re-iterating the steps for a portion of the destination and originating antennas; and determining pre-equalization coefficients for the data signal from a set of the impulse response

Abstract: An apparatus and method for performing Uplink (UL) communication by a Relay Station (RS) in a wireless communication system are provided. The RS receives a Transmit/receive Transition Gap (TTG) and a Receive/transmit Transition Gap (RTG) of a Base Station (BS) during a network entry process of the RS, receives, from the BS, an idle time R_IdleTime between frames used in the RS, and determines a structure of a UL frame. In the alternative, the RS determines a time interval Tad or an idle time R_IdleTime according to a predetermined scheme, and transmits the Tad or the R_IdleTime to the BS. The proposed apparatus and method reduce an overhead of a frame structure when the RS transitions from a transmission mode to a reception mode or from a reception mode to a transmission mode, the frame structure being for frames of the BS and it adjacent RS, thereby reducing interference.

Abstract: A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antennae at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals. The algorithm further allows the TDM of multiple terminals in a TDMA burst to minimize the number of map entries in a downlink map.

Abstract: An assignment section 101 determines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer section 102 to output forward transmission data. In addition, the assignment section 101 instructs a frame creation section 103 to perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer section 102 holds forward transmission data, and outputs forward transmission data to the frame creation section 103 in accordance with instructions from the assignment section 101. The frame creation section 103 symbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section 104.