论文信息 - Implementation of Novel Bit Loading Algorithm with Power Cut-Back in ADSL Transmitter on DSP

Implementation of Novel Bit Loading Algorithm with Power Cut-Back in ADSL Transmitter on DSP

ADSL (Asymmetric Digital Subscriber Line) adopts modulation scheme called DMT (Discrete multi tone), a multi carrier system. The process of allocating bits into various sub-channels is called bit-loading. In this paper, a new bit-loading algorithm that reduces the power required to transmit data is proposed. Comparison on power cut back with other algorithms is presented. Also the implementation of the algorithm in the transmitter is discussed. A Matlab simulation model has been developed to simulate ADSL transmitter (with bit-loading), channel and receiver. The ADSL system with bit-loading algorithm is also implemented in hardware using TT's DSK6713 kit and comparison of software and hardware results are tabulated.

S. Ravishankar | K.V. Padmaja | B.V. Uma

[1] John M. Cioffi,et al. Understanding Digital Subscriber Line Technology , 1999 .

[2] Anil K. Jain,et al. Feature extraction methods for character recognition-A survey , 1996, Pattern Recognit..

[4] K. V. Padmaja,et al. Simulation and Implementation of a Practical ADSL Environment on DSP Kit , 2006 .

[5] S. Kourtis. Optimum bit allocation algorithm for DMT-based systems under minimum transmitted power constraint , 1999 .

[6] Theodore Antonakopoulos,et al. A new computationally efficient discrete bit-loading algorithm for DMT applications , 2005, IEEE Transactions on Communications.

[7] P. K. Chaturvedi,et al. Communication Systems , 2002, IFIP — The International Federation for Information Processing.