符号間干渉を考慮した通信方式

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This paper relates to a new communication system considered under the effect of the intersymbol interference. We assume, at first, that the characteristics of a communication channel can be expressed as follows. A transmitted block signal of which length is N is correspond to a (1×N) vector s. The intersymbol interference is considered a linear operator to a vector s, and it is expressed by a (N×N+L) matrix C, where L is the length of residual response. After the matrix C operating to the vector s, the channel noise n adds to sC. Therefore, the received signal r is r=sC+n. The communication system is constituted as follows. We operate a cyclic orthogonal (N×N) matrix M to a block data which is shown in a vector d at the transmitting side an get a transmitted block signal s=dM. After the block signal transmitting with the communication channel, the received block signal r is r=sC+n=dMC+n. Operating (N+L×N) matrx M^* to r, where M^* is composed by the extended M, r^*=(dMc+n) M^*=dC^*+nM^*. Next, operating a (N×N) matrix (C^*)^<-1> to r^*, and we get d^*=d+nM^* (C^*)^<-1> We can estimate the transmitting block data d from the received blok data d^*.
山梨大学の論文