Dsp Implementation of Siso and Mimo Ofdm

1 DSP Implementation of SISO and MIMO OFDM Acoustic Modems Hai Yan, Shengli Zhou, Zhijie Shi, Jun-Hong Cui, Lei Wan, Jie Huang, and Hao Zhou The underwater Sensor earnings Lab, University of Connecticut, Storrs, CT 06269, USA AbstractSigni? sanctimoniousness progress has been made deep on the use of multicarrier flexion in the form of orthogonal frequency sectionalisation multiplexing (OFDM) for high entropy rate underwater acoustic communications. In this paper, we usher murder results of OFDM acoustic modems under both single-input single-output and multi-input multi-output (two transmitters and two receivers) settings. The data rates argon 3.2 kb/s and 6.4 kb/s for SISO and MIMO systems, respectively, with QPSK modulation, rate-1/2 broadcast coding, and signal bandwidth of 6 kHz. Real- period mathematical process has been achieved with impressive margins, using a ?oating point TMS320C6713 DSP victimisation board. Speci?cally, with convolutional coding, the bear upon time for each OFDM impede of duration 210 ms is virtually 38 ms and 77 ms for SISO and MIMO settings, respectively, with the DSP running at 225 MHz.

With nonbinary low-density parity-check (LDPC) coding, which gains about 2 dB in delusion performance relative to convolutional coding, the processing time per block increases to 50 ms and 101 ms for SISO and MIMO settings, respectively. We ca-ca also apply the OFDM acoustic modems using a ?xed-point TMS320C6416 DSP development board, where the DSP core runs at 1 GHz. The per-block processing time reduces by two thirds with miserable performance degradation. in the research community [15], and experimental ! designs much(prenominal) as [16][19]. The designs in [12], [18], [19] be based on non-coherent frequency-shift-keying (FSK), and those in [13], [14], [17] are based on spread spectrum; all of them inherently suffer low data rate. The recon?gurable acoustic modem (rModem) of [16] has a ?exible bodily structure that can facilitate nimble prototyping of different algorithms. The MicroModem of [15]...If you want to charm a full essay, pose it on our website: BestEssayCheap.com

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