Chung-Shan Institute of Science and Technology, Armaments Bureau, M.n.d

Mediatek Corporation

National Yang Ming Chiao Tung University

Qisda Corporation

Chung Shan Institute of Science and Technology

Juinn-Horng Deng

Ta-Sung Lee

Po-Tien Lee

Jeng-Kuang Hwang

Fu-Chin Shau

Fu-Yen Kuo

Kuang-Shyr Wu

Yu-Min Chuang

Jwo-Yuh Wu

The present invention relates to a transmission system with interference avoidance capability, which includes a transmission apparatus and a receiving apparatus. The transmission method thereof receives first data by means of an interference-processing module of the transmission apparatus and adds a plurality of extension data to the first data to produce second data for replacing a plurality of data corresponding to an interfered band in the second data with zero data, and then producing transmission data. The transmission data is converted to a radio-frequency signal by a transmission-processing module and transmitted to the receiving apparatus. Thereby, signal interference can be prevented by avoiding spectrum overlap regions.

Transmission system with interference avoidance capability and method thereof

A multiple-input multiple-output code division multiple access (MIMO-CDMA) wireless communication equipment has a transmitter and a receiver. The transmitter has an encoder for receiving and encoding a plurality of data, and sending the data to a quadrature phase-shift keying (QPSK) unit. The QPSK unit conducts QPSK modulating to an output of the encoder and sends it to a space-time block coding (STBC) unit or a space multiplexer to process space-time coding or space coding. A plurality of data frame generating modules generate a data frame respectively based on the output of the STBC unit, a plurality of preamble codes generated by a preamble code spreading unit, a pilot code and a cyclic prefix. The data frame is sent to the receiver via a plurality of transmitting antennas.

Multiple-input multiple-output code division multiple access (MIMO-CDMA) wireless communication equipment

The present invention discloses a MIMO system and method, which is suitable for MC-CDMA communication system with multiple paths to obtain the spectrum efficiency and gain simultaneously. The transceiver performs steps of simultaneously transferring transmitting data to a plurality of parallel data streams, and space time block encoding each data, followed by spreading the encoded data streams with a pre-designed space-path spreading code, and transmitting data with the transmit antennas through multiple paths. Finally, at each receiver, despreading received data by the matched filters, and separating mutually interfering signals with a linear combiner and a BLAST detector to obtain the diversity gain.

Structure of a multi-input multi-output multicarrier code division multiple access communication system and communication method thereof

The present invention provides a communication system, signal pre-processing apparatus and signal receiving apparatus thereof. The signal pre-processing apparatus is used for pre-processing signals before they are transmitted by a plurality of antennas. The apparatus includes a serial-to-parallel converter, L compensation processors and L beam formation processors. First of all, the serial-to-parallel converter converts a digital signal into N divided signals. Each of the compensation processors pre-compensates the N divided signals and outputs a compensated signal. Each of the beam formation processors intensifies the compensated signal and outputs an intensified signal. Each of the antennas combines L intensified signals into a particular signal, and meanwhile, upconverts the particular signal into a RF (radio-frequency) signal for transmission.

Communication system, signal pre-processing apparatus and signal receiving apparatus thereof

A time domain spreading method and apparatus for a UWB receiver are provided. Wherein, a series of received symbol signals are received by the UWB receiver, and transformed by the fast Fourier transform to obtain a series of transformed signals Y(m) according to one of the received symbol signals. Y(m)=Y(m)+jY(m), and m is a positive integer more than zero. The real part and imaginary part of the transferred signals are exchanged and the exchanged signals are inversely outputted to obtain a plurality of despreading received data signals X(m), and X(m)=Y(&#x2212;m)+jY(&#x2212;m).

Time domain spreading method and apparatus for a UWB receiver comprising fast fourier transform and exchange of real and imaginary complex signal components

A method and apparatus for estimation of frequency offset in wireless communications. Symbols to be transmitted are arranged in blocks of K symbols. The symbol blocks and their replicas are interleaved and then encoded into K sequences of coded symbols in space and time domains. The K coded symbol sequences are transmitted from K transmit antennas, while baseband signals carrying the coded symbols are received via J receive antennas and converted into J groups of intermediate signals. Thereafter, an interlaced operation and coherent combination is performed on each of the J intermediate signal groups. J sets of computed signals are thus generated and then combined in the space and time domains to develop a set of combined signals. Consequently, a frequency offset is estimated on the basis of this combined signal set.

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Pingjhen, Taiwan

Juinn-Horng Deng