TY - JOUR AU - K.P.M. Bhat AU - Saurabh Jogdand AU - Salil Malshe AU - Vasundhara Kelkar PY - 2002/01/01 Y2 - 2024/03/28 TI - Hardware implementation of pi/4-DQPSK modem for mobile communication (Short Communication) JF - Defence Science Journal JA - DSJ VL - 51 IS - 3 SE - Electronics & Communication Systems DO - 10.14429/dsj.51.2245 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/2245 AB - Spectrally efficient digital modulation schemes for land mobile voice transmission applications highlighting advantages of a 7Pi/4-DQPSK modem are briefly reviewed, A procedure to generate 7Pi/4-DQPSK signal by directly mapping pairs of input bits through dibit transformation function and analog multiplexer is described. Details of modulator hardware for a standard data rate of 48 kbps are also incorporated, A promising all-digital receiver structure which lends itself for miniaturisation, is described. ER -