Abstract: Determining a frequency offset of a received signal utilizing two or more multipath components of the received signal is provided herein. By way of example, the received signal can be correlated with a synchronization sequence in a time domain or a frequency domain, resulting in separation of the two or more multipath components of the received signal. Analysis of at least one of the multipath components can provide a frequency offset of the received signal. Furthermore, by analyzing the multipath components, estimation of the frequency offset can be improved as compared with single-signal analysis techniques.

Abstract: The present invention relates to an antenna and radio arrangement comprising at least a first antenna and a second antenna, each having a first antenna port and a second antenna port, the arrangement further comprising at least four first transmitting means, where the first antenna's first antenna port is connected to a first transmitting means, the first antenna's second antenna port is connected to a second transmitting means, the second antenna's first antenna port is connected to a third transmitting means, and the second antenna's second antenna port is connected to a fourth transmitting means. At least two transmitting means transmit signals to the corresponding antenna ports, said signals being modulated by the same stream of digital signals and having the same radio carrier frequency, thus accomplishing a spatial combining of the output signals. The present invention also relates to a corresponding method.

Abstract: Systems and methods for code-division multiplex communications. The methods involve forming orthogonal or statistically orthogonal chaotic spreading sequences (CSC1,1, CSCD,1), each comprising a different chaotic sequence. The methods also involve generating an offset chaotic spreading sequence (CSC1,2, CSC1,3, . . . , CSC1,K(1), CSCD,2, . . . , CSCD,K(D)) which is the same as a first one of the orthogonal or statistically orthogonal chaotic spreading sequences, but temporally offset. Spread spectrum communications signals (SSCs) are each respectively generated using one of the orthogonal or statistically orthogonal chaotic spreading sequences. Another SSC is generated using the offset chaotic spreading sequence. The SSCs are concurrently transmitted over a common RF frequency band.

Abstract: Dual-mode communication devices, methods, and systems are provided. Embodiments of the present invention include devices, method, and systems enabling communication in a spread-spectrum communication protocol, comprising: receiving a first portion of a communication frame at a first frequency channel, wherein the first portion of the communication frame comprises a data channel index that indicates a second frequency channel for receiving a second portion of the communication frame; switching to the second frequency channel; and receiving the second portion of the communication frame at the second frequency channel. Other aspects, embodiments, and features are claimed and disclosed.

Abstract: The present invention relates to methods and arrangements for uplink retransmissions from a user equipment to a radio base station in a UTRAN with enhanced uplink. The UE transmits a subframe comprising physical control channel(s) and physical data channel(s) in an initial transmission. According to the present invention, one or more of the physical control channels are transmitted with a lower transmission power level in all or some of the retransmitted subframes in the uplink. This results in reduced control overhead (a smaller part of the transmission power resource is used for control signaling) and thus reduced interference from the overhead. At the same time, the transmission power resource no longer used for the physical control channel information, can be used to increase the transmission power level of the physical data channel information in these retransmitted subframes, which improves the uplink coverage.

Abstract: A downlink channel receiver operable to implement fractional dedicated physical channel (F-DPCH) processing within a Rake receiver structure is provided. The downlink channel receiver includes a receiver, a baseband processing block, a WCDMA processing block, wherein F-DPCH processing is divided between a plurality of hardware processing blocks and a plurality of firmware (FW) processing blocks. The receiver is operable to convert a radio frequency (RF) signal to a baseband signal. The baseband processing block operable to processes and provides the baseband signal to the WCDMA processing block. F-DPCH processing is divided between the plurality of hardware processing blocks and plurality of firmware (FW) processing blocks.

Abstract: A method and apparatus are provided for transmitting a multicarrier spread-spectrum signal formed by a temporal succession of multicarrier symbols, using OQAM modulation and a plurality of inter-orthogonal spreading codes. The method includes spreading at least one complex-value data symbol, representative of a source data signal to be transmitted, over a set of sub-carriers of at least one multicarrier symbol, each of the sub-carriers modulating a complex value.

Abstract: In a signal processing apparatus a synchronizer acquires synchronization with the spreading code of an intermediate frequency signal converted from a signal received from a satellite in a global positioning system. A demodulator then demodulates a message contained in the intermediate frequency signal. A measuring unit outputs a primary signal to a predetermined signal line, the primary signal expressing positioning results for the apparatus as measured on the basis of the demodulated message. A secondary signal output unit attaches a predetermined header to a secondary signal and outputs the result to the predetermined signal line, the secondary signal containing at least the intermediate frequency signal, or a signal generated from the intermediate frequency signal.

Abstract: The invention relates to a method in a base station for handling a request from a user equipment for accessing a service in a radio communications network, the method comprising the steps of receiving a first wide time interval (305) of an incoming signal (300) comprising a first signal sent from the user equipment, the first signal extending along a first narrow time interval (310) being a part of the first wide time interval, the first narrow time interval of the first signal being a possible service access request message; searching the first wide time interval (305) and detecting that the first signal is a possible service access request message; and identifying how the first narrow time interval (310) of the first signal relates to the first wide time interval (305). The relationship will be the same for subsequent time intervals of the incoming signal (300).

Abstract: A frequency selective digital transmission apparatus includes: a preamble transmission processing unit generating a preamble for frame synchronization and spreading the generated preamble with a predetermined spreading code; a header transmission processing unit configuring a header including data attribute information and spreading the header with a predetermined spreading code; a data transmission processing unit performing serial-to-parallel conversion on transmission data according to a selected transmission mode and a spreading scheme and spreading the same with a frequency selective spreading code; and a multiplexing unit multiplexing the preamble, the header, and the data which have been spread by the preamble transmission processing unit, the header transmission processing unit and the data transmission processing unit, respectively, and transmitting the same as digital signals.

Abstract: A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.

Abstract: A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.

Abstract: A disclosed transmission apparatus comprises a switching portion that switches radio access methods; a frequency domain signal generation portion that allocates a radio resource to a spread chip sequence on which one of a fast Fourier transformation and a series/parallel conversion is performed in accordance with the switched radio accessed method, so as to generate a signal in a frequency domain; and a transmission signal generation portion that performs a fast inverse Fourier transformation on the signal in the frequency domain so as to generate a transmission signal.

Abstract: There is disclosed a method of providing detailed information using a multimedia based traffic and travel information message and a terminal for executing the same. A method of providing detailed information using a multimedia based traffic in accordance with this document may comprise receiving transport protocol expert group (TPEG) information, comprising a road traffic message and a multimedia based traffic and travel information message and comprised of a hierarchical structure, displaying one or more events comprised in the road traffic message, allowing a request for detailed information about any one of the events to be input, and receiving detailed information of a multimedia type from a multimedia data providing server through specific one of bearer information comprised in the multimedia based traffic and travel information message and providing the received detailed information.

Abstract: Disclosed herein are various embodiments of collision avoidance systems and methods. One method embodiment, among others, comprises a client sending an end of transmission (EOT) request to an access point (AP), and responsive to the EOT request, the AP responding with an EOT frame.

Abstract: Group resource management is provided utilizing assignment of resources in a persistent manner, which involves assigning a channel and resources to a user device for a specified interval while allowing users within the group to be multiplexed dynamically. A first bitmap is created that is a function of the number of users in the group and the number of channels assigned to that group. A second bitmap is created that has a number of bits equal to a number of “on” bits contained in the first bitmap. The second bitmap can assign a rate option or a size option, which is a function of a profile of a group member that corresponds to the bit. The rate option and size option can be indicated in each x-bit position in the second bitmap Both broadcast and multicast are supported.

Abstract: To reduce the crest factor of a total signal, the signal dynamic range is corrected in baseband upstream of the interpolation filters. To this end, provision is made for the input of a correction device to be coupled to at least two signal sources which are designed to provide digital signals on different frequency bands. The correction device is designed to determine correction factors from the digital signals applied to the input and use them to alter the respective digital signals. The output of the correction device is coupled to a first and at least one second interpolation filter. This allows reduction of the signal dynamic range in baseband, which reduces the crest factor without having to accept substantial losses in signal quality.

Abstract: A bit rate processor in a wireless system includes a front end processor to process physical channel data and to generate encoded transport channel data, a transport channel buffer to hold the encoded transport channel data, and a back end processor to process the encoded transport channel data from the transport channel buffer and to generate decoded transport channel bits. The front end process may include a frame buffer that receives the physical channel data, a first stage to de-map the physical channel data, an intermediate frame buffer that receives the de-mapped physical channel data, and a second stage to process the de-mapped physical channel data and to provide the encoded transport channel data. The back end processor may include a third stage, including a scaling circuit to scale the encoded transport channel data, a decoder to decode the scaled transport channel data, a CRC checker and an output buffer.

Abstract: In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.

Abstract: Provided are a digital communication system using frequency selective baseband and a method thereof. A transmitter of the digital communication system, includes: a preamble/header transmission processing unit for spreading a preamble for frame synchronization and a header including data information; a data transmission processing unit for spreading data by using spread codes having dominant frequency in a desired frequency band, i.e., frequency selective spread codes; and a multiplexer for multiplexing the spreaded preamble and the spreaded header from the preamble/header transmission processing unit and the frequency selective spreaded data from the data transmission processing unit and transmitting the multiplexed signal in digital.

Abstract: Implementations of the present principles include methods and systems for retransmitting un-recovered information within a cognitive radio, anti-jamming system. In accordance with aspects of the present principles, encoding schemes may be optimized for retransmission by utilizing a jamming rate and a number of un-recovered packets to minimize packet loss and thereby enhance throughput. In addition, rateless encoding features may be employed to re-encode un-recovered portions of an information sequence for efficient retransmission.

Abstract: The present invention describes a spread spectrum communication system wherein the frequency of carriers and the code channels of the carriers or both for transmission to a given remote station user vary in time. This provides for a direct sequence spectrum communications system which changes frequency or code channel according to a predetermined pattern. The code channels and frequencies can be determined in accordance with a deterministic function or based upon a subset of the data to be transmitted. A receiver structure is also described for receiving the same.

Abstract: A transmitting device for transmitting signals in a wireless communication system, includes at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby the signal to be transmitted is split into these different streams and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna.

Abstract: Described is a method that includes receiving a signal through a channel; considering at least one channel-related criterion and, in response to the considered at least one channel-related criterion, setting a value of an adaptive combining threshold for a maximum ratio combiner that receives the outputs of a plurality of fingers of a rake receiver.

Abstract: Systems, apparatus, methods, and manufactures for performing link adaptation in a communications system are described. The methods may employ an error rate table that has a channel condition value dimension and a transmission parameter dimension. The elements of the error rate table include expected error rates for data transmitted at various channel conditions according to various transmission parameters. Also, the various transmission parameters may each be associated with a data transmission rate. For a given channel condition value, the methods may determine expected throughputs for each of the transmission parameters according to the associated expected error rates and data transmission rates. A transmission parameter may be selected according to the expected throughputs.

Abstract: Chase combining gains for receiving a scrambled broadcast channel can be achieved even when a portion of each received channel coded transmission contains a portion that varies. A set of possible difference values for this varying portion, such as for a system frame number, provides hypotheses, each having a corresponding probability. One or more of the hypotheses are selected by rank order for adjusting a corresponding received coded transmission so that two or more channel coded transmissions can be combined and blind decoded until one of the hypotheses are confirmed.

Abstract: The present invention discloses a method for code channel allocation and related multiuser detection in a wireless communication system. The method for code channel allocation includes: establishing a relation between at least one channel estimation window and a channelization code, wherein the at least one channel estimation window corresponding to the channelization code includes the channel estimation windows corresponding to all the spread spectrum code branches of a node in which the channelization code exists; and performing code channel allocation according to the relation established. In the method for code channel allocation of the invention, there exists a one-to-many relation between the channelization code/channelization code number established and the at least one channel estimation window. Therefore, during the multiuser detection, the channelization code/channelization code number determined via the at least one channel estimation window activated is unique.

Abstract: A method, computer program product, and system are provided for computing link supportability in a WCDMA communications system. For example, the method can be used to calculate link supportability of a transponder in satellite communications system (e.g. MUOS) in a user-to-base direction. This method can include expressing a carrier signal to noise ratio spectral density for a communication link of interest in terms of a transponder input power of the communication link of interest, a spectral overlap factor representative of one or more interfering communication links, and a transponder input power of the one or more interfering communication links. Assumptions and approximations can be made to simplify the spectral density expression in order to reduce a dimensionality of terms used in the computation of the expression. As such, in reducing dimensionality, the expression becomes a manageable computation for WCDMA communication systems to evaluate.

Abstract: A user equipment terminal for transmitting an uplink control channel to a base station according to a single carrier scheme includes a reception determining unit configured to determine reception of data, which are transmitted from the base station according to scheduling, and generate a reception determination result as first control information; and a control information multiplexing unit configured to assign the first control information to a first radio resource positioned at an end of a system band and assign second control information, which is transmitted with a radio resource dedicated to the user equipment terminal, to a predetermined position in a second radio resource adjacent to the first radio resource, to multiplex the first control information and the second control information into the uplink control channel. The present invention also relates to a base station and an uplink control channel configuration method.

Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.

Abstract: Embodiments provide methods, systems, and apparatuses for adaptive coding, spreading, and modulating over a satellite communication channel. In some embodiments, a method of adaptive coding, sampling, and modulating over a satellite communication channel may include providing multiple data frames. At least one modcode partition may be provided for each data frame. The modcode partitions may represent modulation, coding, spreading, and/or frame size information for respective data frames. Each data frame and the respective modcode partition may be combined to form a modcode data unit. Multiple superframes may be formed. Each superframe may include a first known sequence and multiple subframes. Each subframe for a respective superframe may include a portion of a respective modcode data unit. Multiple superframes may be transmitted across a wireless channel.

Abstract: Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.

Abstract: A device, method, and computer-readable medium are provided. The device includes, but is not limited to, an antenna configured to receive a multipath signal and a processor operably coupled to the antenna to receive the multipath signal. The processor is configured to determine a training signal transmitted from a second device to create the received multipath signal; sample the received multipath signal; and determine channel coefficients based on the sampled multipath signal and the determined training signal using a mixed-norm convex optimization process, wherein the channel coefficients characterize a channel associated with the multipath signal.

Abstract: A channel information feedback method, an information processing method, a mobile station, a base station, and a MIMO system are disclosed by embodiments of the present invention. Through the foregoing technical solutions, different numbers of channel information feedback bits are allocated for different channels dynamically, and the feedback gain is made better use of.

Abstract: A new channel is added to FLO networks that carries embedded signaling parameter information. The design is such that regardless of the actual values of the signaling parameters conveyed, a receiver will be able to demodulate this new channel. Moreover, the addition of the new channel does not render a FLO network that has been so configured to not be backwards-compatible with existing devices.

Abstract: Techniques for allocating and mapping resources in a wireless communication system are described. The system may use hop-ports to facilitate allocation and use of subcarriers. In one aspect, the hop-ports may be partitioned into multiple subzones, with each subzone including a configurable number of hop-ports. The hop-ports within each subzone may be permuted or shuffled based on a permutation function. After permutation, the hop-ports in all subzones may be mapped to the subcarriers based on local or global hopping. In another aspect, a set of hop-ports may be mapped to a set of subcarriers. A hop-port may be mapped to an unavailable subcarrier and may then be remapped to another available subcarrier. In yet another aspect, a set of hop-ports may be mapped to a set of subcarriers distributed (e.g., evenly) across all subcarriers but avoiding subcarriers in a reserved zone.

Abstract: Disclosed is a vector quantizer capable of improving the quantization accuracy of vector quantization to switch over the codebook of the vector quantization of a first stage depending on the type of feature having a correlation with a vector to be quantized. In the quantizer, a classifier (101) selects a classification code vector indicating the type of feature having the correlation with the vector to be quantized from a plurality of classification code vectors. A switch (102) selects a first codebook corresponding to the type from a plurality of first codebooks. An error minimizing section (105) selects a first code vector closest to the vector to be quantized from a plurality of first code vectors constituting the selected first codebook. An additivity factor determining section (106) selects an additivity factor vector corresponding to the type from a plurality of additivity factor vectors.

Abstract: A method for using a wireless digital base station to receive, process and transmit a plurality of communications having independent data rates establishing a first communication channel having a first data communication rate to support a first communication; determining the data rate required to support the first communication; selecting one or more transmission channels, from a plurality of available transmission channels, required to support said required data rate; and transmitting the first communication using one or more selected transmission channels. The plurality of available transmission channels includes at least one B or D channel.

Abstract: A reference signal multiplexing method for multiple mobile stations includes: grouping together control signals for the multiple mobile stations; and multiplexing reference signals corresponding to the control signals by CDM over the same bandwidth as that of grouped control signals.

Abstract: An improved method and system for determining round-trip time (RTT) during a radio link protocol (RLP) wireless communication link. The RTT estimate is negotiated by both sides of the RLP communication link without the need for the 3-way handshake generally required for RLP synchronization. The method includes techniques used by both sides of the RLP communication link to dynamically update and refine their initial, negotiated RTT estimates.

Abstract: The invention relates to a method of communication in a wireless communication system comprising a first station and at least a second station wherein each of the station for at least a part of the time controls the communication within the system. The first station encodes and transmits messages having a first format in a first mode using at least one communication channel or having a second format in a second mode using one communication channel. The first and second formats have a common part. The second station receives and decodes at least the common part of messages transmitted either the first mode or the second mode. The common part comprises information on one or more upcoming transmissions of the first station.

Abstract: A method is described for transmitting information in a communication channel of a wireless communication system in which the communication channel is divided into a plurality of time slots of equal duration and each of the time slots is further sub-divided into multiple sub-slots or resource units. In one illustrative embodiment, the communication channel is divided into time slots according to a time division multiple access scheme. Each time slot is then further code-multiplexed into one or more sub-slots according to a code division multiple access scheme. Each of the sub-slots is therefore capable of carrying a separately coded transmission within the communication channel so that multiple simultaneous transmissions can occur in any given time slot.

Abstract: A radio transmitter select its operating frequency based on the frequency characteristics of a collocated receiver and clock harmonics. The radio transmitter can dynamically change its operating frequency in a wide enough range so as to avoid frequencies where its spurs fall on the receive frequency of the collocated receiver. The frequency characteristics of the clock harmonic of the radio transmitter and the collocated receiver are obtained, then a range of operating frequencies is calculated to enable the collocated devices to operate without undue interference.

Abstract: Method and apparatus are provided for encoding cell-specific information in a telecommunication system. Cell-specific information is encoded by a synchronization code. A synchronization signal including the synchronization code is sent, wherein the synchronization code includes a first repetitive cyclically permutable codeword generated from a first codeword ( c 1 , c 2 , … ? ? c i ? ? … ? , c ? M 2 ? ) , where ? ? ? M 2 ? is the smallest integer not less than M/2, 0?ci?N, 1?i?M for all i, M, N are positive integers, and the repetitive structure of the first repetitive cyclically permutable codeword is given by repeating the value of at least one codeword element of the first repetitive cyclically permutable codeword in at least one other codeword element position within the first repetitive cyclically permutable codeword.

Abstract: The present disclosure discloses a method and an apparatus for transmitting an overload message. By detecting, after determining a latest transmit slot for an overhead message to be transmitted, whether there is an idle paging slot between a current slot and the latest transmit slot, the method transmits the overhead message to be transmitted in the idle paging slot or in the latest transmit slot, such that, when scheduling overhead messages, a paging scheduling module of the base station system not only can meet the requirement of transmitting each overhead message at least once in one overhead message period as required in CDMA2000 protocol, but also automatically schedule the next overhead message when there is an idle slot in the paging channel, thus making the best use of the idle slots of the paging channel and shortening the actual transmission period for overhead messages, without affecting the transmission of other messages in the paging channel.

Abstract: A system and method to provide cross-paging between circuit and packet data networks includes providing a mobile station being on a circuit-switched communication in a first area while maintaining a packet data session on the packet data network. When the mobile station moves to a second location area served by the circuit-switched network while the mobile station is still idle with respect to packet communications on the packet data network the location of the mobile station with respect to the circuit-switched network becomes unknown by the packet data network. In this case, the circuit-switched network informs the packet data network of a change in the mobile switching center serving the mobile station.

Abstract: Examples are disclosed for transmitting and receiving schemes for multiuser single-carrier space time spreading (STS) with frequency domain equalization.

Abstract: In order to improve reception performance, while reducing the arithmetic amount of a receiver apparatus in a multi-carrier CDMA system, different weightings are performed for the respective spread codes (chips) included in subcarriers in addition to performing weightings for the respective subcarriers.

Abstract: Disclosed is a device and method for compensating for phase distortions in a base station of an OFDMA-based cellular system. The method comprises receiving OFDM symbols from a plurality of mobile stations, canceling a symbol guard interval using a reference timing signal, and performing an FFT (fast Fourier transform) process on the OFDM symbols; dividing the OFDM symbols that have undergone FFT processing into subchannel groups of the mobile stations; restoring phases of the OFDM symbols divided into subchannel groups; and performing channel estimation and equalization on the restored OFDM symbols for each mobile station to thereby perform a demodulation process.

Abstract: A method for duplex telecommunication connection in radio connections is based on a frame-structured interactive communication and a radio system where the frame-structured interactive communication is performed in the radio connections. A means is provided for improving the use of channel resources in implementation of interactive telecommunication connection by providing an FDD connection with one or more TDD dimensions. A full-duplex frequency band is time-duplexed into two or more sub-bands in which interactive communication takes place substantially independently. Transmissions in different transmission directions in each sub-band occur at different times, but simultaneous transmission can occur in different sub-bands in different transmission directions. The message is received entirely in one transmission direction before it needs to be responded to in another transmission direction in a particular sub-band.