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Your search keyword '"Parra-Michel, Ramon"' showing total 26 results
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26 results on '"Parra-Michel, Ramon"'

3. Modular Arithmetic CPM for SDR Platforms

Author

Ramirez-Perez, Abisai, primary, Aldana-Lopez, Rodrigo, additional, Longoria-Gandara, Omar, additional, Valencia-Velasco, Jose, additional, Pizano-Escalante, Luis, additional, and Parra-Michel, Ramon, additional

Published
2022
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23. Multiuser MIMO Downlink Transmission using Spatial Modulation.

Author

Castillo Soria, Francisco Ruben, Sanchez Garcia, Jaime, Rodriguez Abdala, Viktor Ivan, and Parra Michel, Ramon

Abstract

This paper presents a novel scheme to transmit signals in a Multiuser Multiple-Input Multiple-Output (MU-MIMO) downlink scenario. The proposed scheme uses the recently introduced Spatial Modulation (SM) technique to transmit a broadcast signal for multiple users. It has the advantage of not requiring Channel State Information (CSI) at the transmitter side, while simultaneously it offers flexibility for transmitting different quantity of bits per user. Analytical and Monte Carlo Simulations results are reported. For the analyzed cases, the proposed scheme has performance gain of 10 dB for an Average Bit Error Probability (ABEP) of approximately 10e-3 when compared to the conventional Channel Inversion scheme based on precoding with knowledge of the CSI. [ABSTRACT FROM PUBLISHER]

Published
2015
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26. A New Single $h$ and Multi- $h$ CPM Transmitter.

Author

Ramirez-Perez, Abisai, Parra-Michel, Ramon, Rodriguez-Garcia, Alberto, and Gonzalez-Perez, Luis F.

Subjects
*CONTINUOUS phase modulation, *TRANSMITTERS (Communication), *SOFTWARE radio, *WIRELESS communications, *ELECTRONICS
Abstract

Continuous phase modulation (CPM) is widely employed in digital communication systems due to its high spectral efficiency. The main digital implementations originate in the well-known ROM-based approach. In this approach, the memory size may be very large and depends completely on the modulation parameters. This means that supporting several modulation types would require a proportional increase on the memory resources. In this paper, a new versatile single $h$ and multi- $h$ CPM transmitter is introduced, which can be reconfigured for handling any kind of CPM waveform without noticeable increase in memory. A complete digital architecture is also provided. This represents a truly reconfigurable CPM transmitter, which can be used for software defined radio platforms. Implementation results show that in data rates of more than 20 Mbps as required by the IRIG-106-15 standard, the proposed approach yields a savings of around 1.5 megabits of memory when compared to the ROM approach, at the expense of requiring 15 multipliers. Additionally, for medium-rate implementations as required in the Bluetooth standard, the proposed transmitter offers a savings of about 50 Kbits of memory while requiring only two multipliers. Simulation results confirm that the signals produced by this new approach match those expected from theoretical analysis. [ABSTRACT FROM AUTHOR]

Published
2016
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