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A differential QPSK modem using the TMS320C6711 DSK

Weiss, S. and Bennett, Matthew and Gibson, E. and Tisdale, N. (2004) A differential QPSK modem using the TMS320C6711 DSK. In: European DSP Education and Research Symposium, 2004-11-16.

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Abstract

We report on a student project implementing a D-QPSK modem on a TI C6711 DSK. The modem incorporates functionalities such as QPSK symbol generation, differential encoding and decoding, transmit- and receive filtering, quadrature modulation, timing synchronisation, and bit error detection. Both transmitter and receiver have to be operated concurrently and in real time. The DSK's on-board digital to analogue and analogue to digital converters were employed to interface the transmitted and received signals of the modem. Based on a set of specifications, the various solutions implemented by the students had to be compatible and be able to synchronise with each other.