National Chi Nan University

Industrial Technology Research Institute

Shyue-Win Wei

Hsin-An Hou

Chao-Wei Chen

Ting-Ru Yan

Harmoko Habibi Roni

Hung-Jen Tsai

Yih-Haw Jan

Tung-Chou Chen

A method of multi-symbol channel estimation for estimating channel response to a plurality of transmission symbols within an observation window transmitted through a time-varying channel in a multi-carrier modulation system is provided. The method is to be implemented using a channel estimation device, and includes the steps of: obtaining a window pilot receive vector according to a part of elements of each of receive symbols corresponding to pilots in a corresponding one of the transmission symbols; computing a window pilot channel trans form matrix based upon the pilots in the transmission symbols; computing an estimated value of a polynomial coefficient vector based upon the window pilot receive vector and the window pilot channel transform matrix; and for each of the transmission symbols, computing a plurality of estimated values of channel response associated with possible transmission paths in the time-varying channel according to the estimated value of the polynomial coefficient vector.

Multi-symbol channel estimation method for estimating channel response in a multi-carrier modulation system

A signal transmitting method, a signal receiving method, and a signal receiving device are adapted to an OFDM system. In the signal transmitting method and signal receiving method, double asymmetric training symbols are used for performing time-varying channel response estimation. In the transmitting method, asymmetric pilot sub-carriers are added in data sub-carriers to form a plurality of first and second training symbols. The pilot symbols in the first and second training symbols are asymmetrically configured. In the receiving method, a channel response corresponding to each pilot sub-carrier is estimated by using two adjacent asymmetric pilot symbols. The received data sub-carrier is then restored through the channel response. Through the signal transmitting method and signal receiving method, even in a transmitter or a receiver moving at a high speed, more bandwidths can be used to transfer data, and contents of the transferred data can be correctly estimated.

Signal transmitting method, signal receiving method and signal receiving device in OFDM system

An arithmetic unit which performs all basic arithmetic operations in a finite field GF(2 ) and includes an arithmetic processor, an arithmetic logic unit and a control unit is disclosed. The arithmetic unit of the present invention is structured with a low circuit complexity, so that an error-correcting decoder applying this calculating processor can be greatly simplified.

Arithmetic circuit for finite field GF (2m)

Growing community of inventors

Hsinchu, Taiwan

Shyue-Win Wei