Abstract: According to one exemplary embodiment, a light communication system comprises a transmitting apparatus and a receiving apparatus. The transmitting apparatus generates one or more patterns of light to decide at least one reference area, and transmits signals by emitting light in the at least one reference area decided by the one or more patterns. The receiving apparatus takes measurements fewer than a total amount of pixels over a sensed image to detect the one or more patterns of light, and decides at least one ROI according to one or more detected one or more patterns; then takes all signals of light in the at least one ROI for processing of the light communication, and takes measurements fewer than a total amount of pixels over at least one tracking area for tracking the one or more patterns of light emitted by the transmitting apparatus.

Abstract: Communication methods for aggregation of heterogeneous component carriers and communication devices and wireless communication stations using the same methods are proposed. In one embodiment, the proposed communication method is adapted to a wireless communication station and includes aggregating physical channel resources respectively corresponding to heterogeneous access technologies in a Layer 2 or below the Layer 2 in a protocol stack; and communicating with at least one wireless terminal communication device through the physical channel resources respectively corresponding to the heterogeneous access technologies, wherein the physical channel resources respectively corresponding to heterogeneous access technologies are heterogeneous component carriers. The physical channel resources may be heterogeneous component carriers, such as radio component carrier(s), optical component carrier(s), and/or acoustic component carrier(s).

Abstract: A light communication system, a transmitter and a receiver are provided. The light communication system includes the transmitter and the receiver. The transmitter has a first processing unit and a light-emitting element. The first processing unit produces a transmission signal. The light-emitting element produces light to carry the transmission signal. The receiver has a first variable lens, a photosensitive element and a second processing unit. The first variable lens changes the propagation path of the light. The photosensitive element senses the light passed through the first variable lens to produce a receiving signal. The second processing unit controls the first variable lens based on the signal quality of the receiving signal to change the equivalent channel between the transmission signal and the receiving signal. Therefore, the transmission capability of the light communication system is enhanced.

Abstract: In a light communication system, a data embedding unit arranged between a transmitter-side communication data processing unit and a light emitting device driver embeds a communication processed data at a spatial domain of an original image according to a modulation scheme, and gets multiple RGB values for a communication data embedded image. A receiving apparatus detects a transmitter-side communication data embedded image, generates a receiver-side communication data embedded image, compensate a deformation of the receiver-side communication data embedded image, outputs a warped communication data embedded image, and extracts a communication processed data from the warped communication data embedded image.

Abstract: In a light communication system, a data embedding unit arranged between a transmitter-side communication data processing unit and a light emitting device driver embeds a communication processed data at a spatial domain of an original image according to a modulation scheme, and gets multiple RGB values for a communication data embedded image. A receiving apparatus detects a transmitter-side communication data embedded image, generates a receiver-side communication data embedded image, compensate a deformation of the receiver-side communication data embedded image, outputs a warped communication data embedded image, and extracts a communication processed data from the warped communication data embedded image.

Abstract: A method of performing a handover process in a wireless multi-hop communication network, the method comprising requesting neighborhood communication information regarding channel condition among access stations in the neighborhood of a mobile station, the neighborhood communication information including communication information related to a link between a first station and a second station in the wireless multi-hop communication network, obtaining the communication information related to the link between the first station and the second station, sending the communication information from the first station to a mobile station in the wireless multi-hop communication network, and configuring the mobile station based on the communication information so as to switch the mobile station to the second station.

Abstract: A method forms a preamble sequence in a wireless communication system.

Abstract: According to one exemplary embodiment, a light communication system comprises a transmitting apparatus and a receiving apparatus. The transmitting apparatus generates one or more patterns of light to decide at least one reference area, and transmits signals by emitting light in the at least one reference area decided by the one or more patterns. The receiving apparatus takes measurements fewer than a total amount of pixels over a sensed image to detect the one or more patterns of light, and decides at least one ROI according to one or more detected one or more patterns; then takes all signals of light in the at least one ROI for processing of the light communication, and takes measurements fewer than a total amount of pixels over at least one tracking area for tracking the one or more patterns of light emitted by the transmitting apparatus.

Abstract: Methods and apparatuses for reception of point-to-multipoint (PTM) transmissions in a wireless communication system including a set of receiving devices. The method includes receiving location information respectively associated with each of a plurality of PTM data versions, and retrieving the plurality of PTM data versions using the location information. The method also includes combining the retrieved plurality of PTM data versions to generate a combined PTM data version, and decoding the combined PTM data version.

Abstract: Communication methods for aggregation of heterogeneous component carriers and communication devices and wireless communication stations using the same methods are proposed. In one embodiment, the proposed communication method is adapted to a wireless communication station and includes aggregating physical channel resources respectively corresponding to heterogeneous access technologies in a Layer 2 or below the Layer 2 in a protocol stack; and communicating with at least one wireless terminal communication device through the physical channel resources respectively corresponding to the heterogeneous access technologies, wherein the physical channel resources respectively corresponding to heterogeneous access technologies are heterogeneous component carriers. The physical channel resources may be heterogeneous component carriers, such as radio component carrier(s), optical component carrier(s), and/or acoustic component carrier(s).

Abstract: According to one exemplary embodiment of a universal modem system, multiple digital signal processors (DSPs) are configured to perform at least one streaming-based task, or at least one block-based task, or both of the tasks. At least one concatenate memory is configured to store data for the at least one streaming-based task At least one concatenate bus connects at least one concatenate memory and the plurality of DSPs serially for performing the at least one streaming-based task. At least one concatenate memory is configured to store the data for the at least one streaming-based task. At least one public bus connects the plurality of DSPs and the at least one shared memory for performing the at least one block-based tasks.

Abstract: A method forms a preamble sequence in a wireless communication system.

Abstract: A signal detecting method and a receiver using the same are provided. The method includes the following steps. A receiving signal vector y is received through a number of channels, wherein the receiving signal vector y corresponds to a transmitting signal vector x transmitted by at least one of the channels. A channel matrix H is determined, wherein the channel matrix H represents at least one of the channels. A factorization matrix D is chosen, wherein D is invertible to make the channel matrix H expressed as H={tilde over (H)}D, and {tilde over (H)} is a corresponding channel matrix. The factorization matrix D is determined to make an expected value of the signal estimate error become smaller. The receiving signal vector y is detected to estimate the transmitting signal vector x according to the corresponding channel matrix {tilde over (H)} and the factorization matrix D.

Abstract: A method of constructing a frame structure for data transmission, the method comprising generating a first section comprising data configured in a first format compatible with a first communication system, generating a second section following the first section, the second section comprising data configured in a second format compatible with a second communication system, wherein the second format is different from the first format, generating at least one non-data section containing information describing an aspect of data in at least one of the first section and the second section, and combining the first section, the second section and the at least one non-data section to form the frame structure.

Abstract: Methods for data transmission management used in a transmitter are provided. The method comprises the steps of: encoding M uncoded packets into N coded packets with Q-packet error correction capability using concatenated encoding, where M?N, and Q?1; sequentially transmitting a set or all of the N coded packets to the at least one receiver; receiving at least one feedback information from the at least one receiver, wherein the at least one feedback information comprises at least one ACK or NACK information for indicating decoding statuses of the transmitted coded packets, each of the transmitted coded packets having one of the decoding statuses corresponding thereto; and determining whether to perform a retransmission procedure to retransmit a dedicated packet to the at least one receiver according to collected ACK/NACK included in the feedback information.

Abstract: An apparatus for data processing in a multi-channel communication system is provided. The apparatus includes an encoder configured to encode a number of bits for transmission via channels in the multi-channel communication system into coded bits and split the coded bits into a number of first sets of bits at a first ratio, a number of first rate units coupled to the encoder, each of the first rate units being configured to adjust one set of the first sets of bits in size at at least one rate, and a controller configured to assign the first ratio to the encoder and the at least one rate to each of the first rate units based on conditions of the channels.

Abstract: A system and method for identifying a resource region including a plurality of symbols, allocating pilot signals to the resource region, identifying pilot-free symbols free of the pilot signals in the plurality of symbols, arranging sacrifice carriers for a first region of a group of symbols in the pilot-free symbols at a first density for a first communication station, and arranging sacrifice carriers for a second region of the group of symbols in the pilot-free symbols at a second density for a second communication station, the first communication station mobile with respect to an access communication station at a first relative speed and the second communication station is mobile with respect to the access communication station at a second relative speed, and wherein the first density of sacrifice carriers is greater than the second density of sacrifice carriers if the first relative speed is greater than the second relative speed.

Abstract: An orthogonal frequency division multiplexing (OFDM) system provided for communication includes an OFDM transmitter and an OFDM receiver. The OFDM transmitter may be configured to transmit OFDM signals through a communication channel and may include a channel encoder configured to encode a plurality of information bits and an interleaver configured to interleave the channel-encoded information bits. The OFDM transmitter may also include a mapper configured to map the interleaved channel-encoded information bits into mapped multi-level symbols. The OFDM transmitter may also include a dispersive encoder that is configured to dispersively encode the mapped symbols. The OFDM receiver may be configured to receive the transmitted OFDM signals and to decode the received OFDM signals iteratively based on soft decision methods.

Abstract: A method of providing a multi-resolution transmission with a MIMO scheme may include employing a selected modulation scheme to generate a first data stream including basic information and a second data stream including both enhanced information and the basic information, and employing a modulation and multiple input/multiple output (MIMO) scheme to generate data for transmission. The data for transmission may employ a combination of spatial multiplexing and transmit diversity techniques. A corresponding apparatus is also provided. Another method of providing selective recovery of received data at a mobile terminal may include receiving data at a mobile terminal including at least one antenna, receiving information indicative of a data reception condition at the mobile terminal, determining, between spatial multiplexing and transmit diversity mode options, a reception mode to be employed for decoding the data received based on the information indicative of the data reception condition.

Abstract: A method for a first user terminal to receive data from a second user terminal, wherein the first and second user terminals communicate with a transmitting terminal. The method includes: transmitting a first message to the transmitting terminal; receiving a signal from the transmitting terminal, the received signal including information regarding the first message and a second message transmitted from the second user terminal to the transmitting terminal; and decoding, based on the first message, the received signal to receive the second message.