A DSP Implementation of OFDM Acoustic Modem

By Hai Yan & Shengli Zhou & Zhijie Jerry Shi

Abstract:

The success of multicarrier modulation in the form of OFDM in
radio channels illuminates a path one could take towards high-rate
underwater acoustic communications, and recently there are intensive
investigations on underwater OFDM. In this paper, we implement
the acoustic OFDM transmitter and receiver design of [4, 5]
on a TMS320C6713 DSP board. We analyze the workload and
identify the most time-consuming operations. Based on the workload
analysis, we tune the algorithms and optimize the code to substantially
reduce the synchronization time to 0.2 seconds and the
processing time of one OFDM block to 1.7 seconds on a DSP processor
at 225 MHz. This experimentation provides guidelines on
our future work to reduce the per-block processing time to be less
than the block duration of 0.23 seconds for real time operations.

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this document is quiet good for understanding the dsp implementation

very good i need it badly