Digital portable telephone set

Details Digital portable telephone set Digital portable telephone set

2007-03-27

2007-03-27

Tran, Sinh (Department: 2615)

Telephonic communications

Substation or terminal circuitry

C329S304000

Reexamination Certificate

active

09595494

ABSTRACT:
Phase data129of received signal is fed through a one symbol delaying unit141and a second substracter1to a second decoder2for decoding to generate quality data133c. The quality data133cis computationally processed to detect frequency deviation. The quality data133bis obtained by decoding in a first decoder142through the one symbol delaying unit141, a correcting circuit144and a first decoder142. The quality data133bis used for line control.

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Sandeep Chennakeshu, et al. “Differential Detection of pi/4 Shifted-DQPSK for Digital Cellular Radio,” 1991 IEEE, pp. 186-191.

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