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Energy and Spectrally Efficient Modulation Scheme for IoT Applications.

Hany S Hussein1,2, Mohamed Elsayed3, Mahmoud Fakhry4

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Summary
This summary is machine-generated.

We introduce Orthogonal Shaping Pulses Minimum Shift Keying (OSP-MSK), a new MIMO scheme for low-power Internet of Things (IoT) devices. OSP-MSK enhances spectral efficiency and reduces transceiver complexity for better IoT communication.

Keywords:
IoTMIMO-CEMOSP-MSKenergy efficiencyone-bit ADCspectral efficiency

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Area of Science:

  • Wireless communication
  • Signal processing
  • Internet of Things (IoT)

Background:

  • IoT demands high-density, low-power, and low-cost physical (PHY) layer designs for transceivers.
  • Classical transceivers use inefficient linear power amplifiers (PAs) and high-resolution analog-to-digital converters (ADCs), increasing power consumption and hardware complexity.
  • There is a need for transceiver architectures with nonlinear PAs and one-bit ADCs to meet IoT application requirements.

Purpose of the Study:

  • To propose Orthogonal Shaping Pulses Minimum Shift Keying (OSP-MSK) as a Multiple-Input Multiple-Output (MIMO) modulation/demodulation scheme.
  • To enable low-cost transceiver architectures for Internet of Things (IoT) devices.
  • To improve energy efficiency and reduce hardware complexity in IoT transceivers.

Main Methods:

  • Utilizing constant envelope modulation (CEM) techniques at the transmitter (TX) for a low-power budget.
  • Employing a low-resolution one-bit analog-to-digital converter (ADC) at the receiver (RX).
  • Exploiting orthogonality between in-phase and quadrature-phase components of OSP to increase bits per symbol (bps) without extra bandwidth.

Main Results:

  • OSP-MSK achieves a low-power budget through CEM and one-bit ADC.
  • The proposed OSP-MSK offers higher spectral efficiency compared to existing MIMO-CEM schemes with one-bit ADCs.
  • Derived closed-form expressions for Average Bit Error Rate (ABER) in Rayleigh and Nakagami-m fading channels.
  • Obtained a closed-form expression for Power Spectral Density (PSD).

Conclusions:

  • OSP-MSK is a viable modulation scheme for low-cost, low-power IoT transceiver design.
  • The scheme enhances spectral efficiency while maintaining low power consumption.
  • Analytical derivations for ABER and PSD are validated by Monte Carlo simulations, confirming the scheme's effectiveness.