摘要:
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.
摘要:
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.
摘要:
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.
摘要:
An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.
摘要:
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.
摘要:
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. A corresponding apparatus is also provided.
摘要:
At the transmitter of a transmitter and receiver apparatus for Multiple Input/Multiple Output MultiCarrier-Code Division Multiple Access (MIMO MC-CDMA) systems, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. As a result, space, time, and frequency diversity can be explored.
摘要:
The invention relates to an apparatus of transmitter and receiver for MIMO MC-CDMA systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. Upon the invention, the space, time, and frequency diversity can be explored.
摘要:
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).
摘要:
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.