Abstract :
The adoption of asymmetrical digital subscriber lines (ADSL) technology in conjunction with the broadcast digital subscriber lines (BDSL) proposed in this paper could provide a cost effective solution for the introduction of digital video services in the near term. BDSL provides the same digital broadcast video programs to all subscribers through existing twisted pair telephone loops. In this paper, the basics of telephone loop-based digital subscriber lines are first discussed. Then the potential of BDSL is explored in the twisted pair loop plant near end crosstalk (NEXT), far end crosstalk (FEXT), and white noise environment. The capability of BDSL is examined with different serving areas and transmit power levels. The possibility of using orthogonal quadrature amplitude modulation (QAM) to implement a zero guard-band BDSL system is studied. Computer BDSL performance simulations are then presented. The combination of high-bit-rate digital subscriber lines (HDSL), ADSL, and BDSL can provide telephone subscribers many digital broadband services
Keywords :
cable television; crosstalk; digital television; quadrature amplitude modulation; subscriber loops; twisted pair cables; visual communication; white noise; ADSL; BDSL; QAM; broadcast digital subscriber lines; digital broadband services; digital video services; far end crosstalk; high-bit-rate digital subscriber lines; performance simulations; telephone loop-based digital subscriber lines; twisted pair loop plant near end crosstalk; twisted pair telephone loops; white noise; zero guard-band BDSL system; Broadcast technology; Computational modeling; Computer simulation; Costs; Crosstalk; DSL; Digital video broadcasting; Quadrature amplitude modulation; Telephony; White noise;
