Subscriber's-line communication system
专利汇可以提供Subscriber's-line communication system专利检索，专利查询，专利分析的服务。并且PURPOSE:To increase channel capacity by alloting codes to many terminals, equipped to a common transmission line individually, by diffusing the frequency spectra of information to be sent in a broad frequency band, and by sharing this band among different kinds of communication at the same time. CONSTITUTION:Common transmission lines 5 and 6 are up and down buses and to terminals EU-A, EU-B... connected to them, codes which are small in correlation and composed of a PN code or orthogonal code and constant weight code are allotted. For communication between terminals A and B, code pattern constitution unit 12 of terminal A generates the code pattern of terminal B and sends it to code generator 3. The party-side code pattern is generated by generator by a synchronizing signal from synchronizer 18 and by this code, the spectrum diffusing modulation of DS and FH as to a signal from A-D converter 2 is performed by modulator 4. Then, the signal transmitted from switch 17 to transmission line 5 is diffused in a broad band more than 10 times the band of information 1 and transmitted together with signals from many terminals. At the party-side terminal, correlation detector 7 receives them correlating.，下面是Subscriber's-line communication system专利的具体信息内容。
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