Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implementing a LoRa Software-Defined Radio on a General-Purpose ULP
  Microcontroller   Emerging Internet-of-Things sensing applications rely on ultra low-power
(ULP) microcontroller units (MCUs) that wirelessly transmit data to the cloud.
Typical MCUs nowadays consist of generic blocks, except for the
protocol-specific radios implemented in hardware. Hardware radios however slow
down the evolution of wireless protocols due to retrocompatiblity concerns. In
this work, we explore a software-defined radio architecture by demonstrating a
LoRa transceiver running on custom ULP MCU codenamed SleepRider with an ARM
Cortex-M4 CPU. In SleepRider MCU, we offload the generic baseband operations
(e.g., low-pass filtering) to a reconfigurable digital front-end block and use
the Cortex-M4 CPU to perform the protocol-specific computations. Our software
implementation of the LoRa physical layer only uses the native SIMD
instructions of the Cortex-M4 to achieve real-time transmission and reception
of LoRa packets. SleepRider MCU has been fabricated in a 28nm FDSOI CMOS
technology and is used in a testbed to experimentally validate the software
implementation. Experimental results show that the proposed software-defined
radio requires only a CPU frequency of 20 MHz to correctly receive a LoRa
packet, with an ultra-low power consumption of 0.42 mW on average.

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The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg