1. DCT-Based Air Interface Design for Function Computation
- Author
-
Miguel Angel Lagunas Hernandez, Marc M. Gost, Ana Isabel Perez-Neira, Universitat Politècnica de Catalunya. Doctorat en Teoria del Senyal i Comunicacions, and Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
- Subjects
Signal Processing (eess.SP) ,Air interface ,Over-the-air computing ,Mean square error ,Over-the-air computing (AirComp) ,WSN ,Enginyeria de la telecomunicació::Processament del senyal [Àrees temàtiques de la UPC] ,Wireless sensor networks ,Discrete cosine transforms ,Receiver ,Cosine transforms ,Functions approximations ,Joint communication and computing ,Signal Processing ,FOS: Electrical engineering, electronic engineering, information engineering ,Frequency modulation ,Task-oriented ,Interface designs ,Electrical Engineering and Systems Science - Signal Processing ,Over the airs ,Task-oriented communication ,Xarxes de sensors sense fils - Abstract
With the integration of communication and computing, it is expected that part of the computing is transferred to the transmitter side. In this paper we address the general problem of Frequency Modulation (FM) for function approximation through a communication channel. We exploit the benefits of the Discrete Cosine Transform (DCT) to approximate the function and design the waveform. In front of other approximation schemes, the DCT uses basis of controlled dynamic, which is a desirable property for a practical implementation. Furthermore, the proposed modulation allows to recover both the measurement and the function in a single transmission. Our experiments show that this scheme outperforms the double side-band (DSB) modulation in terms of mean squared error (MSE). This can also be implemented with an agnostic receiver, in which the function is unknown to the receiver. Finally, the proposed modulation is compatible with some of the existing transmission technologies for sensor networks., Comment: Paper accepted in IEEE Open Journal of Signal Processing (2023)
- Published
- 2023