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 subaquatic Sensor earnings Lab, University of Connecticut, Storrs, CT 06269, USA AbstractSigni? careen progress has been made deep on the use of multicarrier modulation in the form of orthogonal frequency sectionalisation multiplexing (OFDM) for high school selective information rate underwater acoustic communications. In this paper, we cede 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 deed has been achieved with impressive margins, using a ?oating point TMS320C6713 DSP victimisation board. Speci?cally, with convolutional coding, the impact time for each OFDM impede of duration 210 ms is just about 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 mistake 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 measly performance degradation. in the research community [15], and exper imental designs such(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 social structure that can facilitate nimble prototyping of different algorithms. The MicroModem of [15]...If you want to allow a full essay, pose it on our website: BestEssayCheap.com

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