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 semiaquatic Sensor earnings Lab, University of Connecticut, Storrs, CT 06269, USA AbstractSigni? sham progress has been made deep on the use of multicarrier modulation in the form of orthogonal frequency sectionalisation multiplexing (OFDM) for extravagantly entropy rate underwater acoustic communications. In this paper, we award 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 outgrowth has been achieved with impressive margins, using a ?oating point TMS320C6713 DSP victimisation board. Speci?cally, with convolutional coding, the bear upon time for eac h OFDM impede of duration 210 ms is some 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 error 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 utilize 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 minimal performance degradation. in the research community [15], and experimental designs much(prenom! inal) 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 building that can facilitate nimble prototyping of different algorithms. The MicroModem of [15]...If you want to impart a full essay, pose it on our website: BestEssayCheap.com

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