On preambles with low out of band radiation for channel estimation

Gourab Ghatak (1, 2) , Maximilian Matthe (3) , Adrish Banerjee (4) , Gerhard P. Fettweis (3)

1 Télécom ParisTech
2 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
3 TU Dresden - Technische Universität Dresden = Dresden University of Technology
4 IIT Kanpur - Indian Institute of Technology Kanpur

We investigate preamble designs for channel estimation that jointly address the estimation efficiency and the out of band (OOB) radiation of the transmit preambles. Accordingly, we provide two novel techniques for obtaining preambles for a single carrier system. Furthermore, we give a juxtaposition based method to extend their application to multi-carrier systems. The obtained preambles have 10 dB to 35 dB lower OOB radiation than the existing preamble based estimation techniques in literature. We also bring out the fundamental trade-off that exists between the estimation efficiency and the OOB radiation power, and highlight that the improved OOB performance comes at a cost of increased estimation error. Finally, as a case study, we study the performance of the obtained preambles in a multiple input multiple output (MIMO) Generalized Frequency Division Multiplexing ( GFDM) system, aimed for transmit diversity.

Keywords: Channel estimation; Preambles; Out-of-band radiation; MIMO-GFDM

Domains: Engineering Sciences [physics]

Gourab Ghatak, Maximilian Matthe, Adrish Banerjee, Gerhard P. Fettweis. On preambles with low out of band radiation for channel estimation. Physical Communication, 2019, 32, pp.252-260. ⟨10.1016/j.phycom.2018.12.006⟩. ⟨cea-02186467⟩