Title :
3-Level partial-response signalling for voice-grade circuits
Author :
Das, Joydeep ; Rakshit, Subrata
Author_Institution :
Indian Institute of Technology, Department of Electronics & Electrical Communication Engineering, Kharagpur, India
Abstract :
Contrary to present practice, data transmission through voice-grade circuits becomes more efficient when p.r.s. codes are used. It is shown that 3-level and higher-level p.r.s. codes can achieve data rates up to 7.2 kb.p.s. when suitable delay equalisation of the bandpass channel (300¿3400 Hz) is provided. Satisfactory eye pattern and error rates have been obtained.
Keywords :
data communication systems; encoding; bandpass channel; data transmission; delay equalisation; encoding; three level partial response signalling; voice grade circuits;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780389
